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Improve handling of the debug log file. Fix handling of empty strings in uci options and reassigning of the log file Fixes https://github.com/official-stockfish/Stockfish/issues/3650 Closes https://github.com/official-stockfish/Stockfish/pull/3655 No functional change
2021-08-13 14:20:11 -06:00
# List of authors for Stockfish
Add AUTHORS
2014-06-20 19:35:09 -06:00
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
# Founders of the Stockfish project and fishtest infrastructure
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Tord Romstad (romstad)
Update AUTHORS for SF8 And format top contriutor (space instead of tabs, proper Unix line endings).
2016-11-04 07:39:24 -06:00
Marco Costalba (mcostalba)
Joona Kiiski (zamar)
Gary Linscott (glinscott)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
# Authors and inventors of NNUE, training, NNUE port
Yu Nasu (ynasu87)
Motohiro Isozaki (yaneurao)
Hisayori Noda (nodchip)
# all other authors of the code in alphabetical order
Update list of authors No functional change
2018-11-29 07:15:43 -07:00
Aditya (absimaldata)
Improve the Readme I tried to improve the Readme because many people in my local chess club do not understand some of the UCO options properly. Starting point of this was Cfish's Readme by Ronald de Man, some internet resources and the Stockfish code itself. Closes https://github.com/official-stockfish/Stockfish/pull/1898 Initial commit by user @erbsenzaehler, with help from users Adrian Petrescu, @alayan-stk-2 and Elvin Liu. No functional change Co-Authored-By: Alayan-stk-2 <alayan-stk-2@users.noreply.github.com> Co-Authored-By: Adrian Petrescu <apetresc@gmail.com> Co-Authored-By: Elvin Liu <solarlight2@users.noreply.github.com>
2018-12-29 03:49:10 -07:00
Adrian Petrescu (apetresc)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ajith Chandy Jose (ajithcj)
Alain Savard (Rocky640)
Adjust aspiration window with eval This patch changes the base aspiration window size depending on the absolute value of the previous iteration score, increasing it away from zero. This stems from the observation that the further away from zero, the more likely the evaluation is to change significantly with more depth. Conversely, a tighter aspiration window is more efficient when close to zero. A beneficial side-effect is that analysis of won positions without a quick mate is less prone to waste nodes in repeated fail-high that change the eval by tiny steps. STC: LLR: 2.96 (-2.94,2.94) [0.50,4.50] Total: 60102 W: 13327 L: 12868 D: 33907 http://tests.stockfishchess.org/tests/view/5d9a70d40ebc5902b6cf39ba LTC: LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 155553 W: 25745 L: 25141 D: 104667 http://tests.stockfishchess.org/tests/view/5d9a7ca30ebc5902b6cf4028 Future work : the values used in this patch were only a reasonable guess. Further testing should unveil more optimal values. However, the aspiration window is rather tight with a minimum of 21 internal units, so discrete integers put a practical limitation to such tweaking. More exotic experiments around the aspiration window parameters could also be tried, but efficient conditions to adjust the base aspiration window size or allow it to not be centered on the current evaluation are not obvious. The aspiration window increases after a fail-high or a fail-low is another avenue to explore for potential enhancements. Bench: 4043748
2019-10-07 11:02:33 -06:00
Alayan Feh (Alayan-stk-2)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Alexander Kure
Assorted trivial cleanups (July 2019) No functional change
2019-08-14 14:15:41 -06:00
Alexander Pagel (Lolligerhans)
Increase reduction based on the number of best move changes. Thanks to Vizvezdenec for the PvNode idea and also to vondele the !PvNode idea. Passed STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 19120 W: 1998 L: 1839 D: 15283 Ptnml(0-2): 76, 1445, 6375, 1572, 92 https://tests.stockfishchess.org/tests/view/5fa8af3e67cbf42301d6a6c9 Passed LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 75584 W: 3454 L: 3205 D: 68925 Ptnml(0-2): 54, 2832, 31771, 3081, 54 closes https://github.com/official-stockfish/Stockfish/pull/3224 Bench: 3595418
2020-11-08 19:43:32 -07:00
Alfredo Menezes (lonfom169)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ali AlZhrani (Cooffe)
Small clean-up, Sept 2021 Closes https://github.com/official-stockfish/Stockfish/pull/3485 No functional change
2021-05-27 09:04:47 -06:00
Andrei Vetrov (proukornew)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Andrew Grant (AndyGrant)
Andrey Neporada (nepal)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Andy Duplain
Clean functions returning by const values The codebase contains multiple functions returning by const-value. This patch is a small cleanup making those function returns by value instead, removing the const specifier. closes https://github.com/official-stockfish/Stockfish/pull/3328 No functional change
2021-01-30 01:50:04 -07:00
Antoine Champion (antoinechampion)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Aram Tumanian (atumanian)
Arjun Temurnikar
E2K: added support for MCST Elbrus 2000 CPU architecture e2k (Elbrus 2000) - this is a VLIW/EPIC architecture, the like Intel Itanium (IA-64) architecture. The architecture has half native / half software support for most Intel/AMD SIMD (e.g. MMX/SSE/SSE2/SSE3/SSSE3/SSE4.1/SSE4.2/AES/AVX/AVX2 & 3DNow!/SSE4a/XOP/FMA4) via intrinsics. https://en.wikipedia.org/wiki/Elbrus_2000 closes https://github.com/official-stockfish/Stockfish/pull/3425 No functional change
2021-04-12 04:42:35 -06:00
Artem Solopiy (EntityFX)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Auguste Pop
Balint Pfliegel
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ben Koshy (BKSpurgeon)
Bill Henry (VoyagerOne)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Bojun Guo (noobpwnftw, Nooby)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
braich
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Brian Sheppard (SapphireBrand, briansheppard-toast)
Remove Condition from Generate_Move Loop it seems it's faster to handle blockers_for_king(~Us) outside loops Passed STC: LLR: 2.96 (-2.94,2.94) {-0.25,1.25} Total: 22184 W: 2063 L: 1919 D: 18202 Ptnml(0-2): 63, 1485, 7855, 1623, 66 https://tests.stockfishchess.org/tests/view/5ffbee2f6019e097de3ef18d closes https://github.com/official-stockfish/Stockfish/pull/3299 No functional change
2021-01-09 23:30:40 -07:00
Bruno de Melo Costa (BM123499)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Bryan Cross (crossbr)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
candirufish
Chess13234
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Chris Cain (ceebo)
Embed default net, and simplify using non-default nets covers the most important cases from the user perspective: It embeds the default net in the binary, so a download of that binary will result in a working engine with the default net. The engine will be functional in the default mode without any additional user action. It allows non-default nets to be used, which will be looked for in up to three directories (working directory, location of the binary, and optionally a specific default directory). This mechanism is also kept for those developers that use MSVC, the one compiler that doesn't have an easy mechanism for embedding data. It is possible to disable embedding, and instead specify a specific directory, e.g. linux distros might want to use CXXFLAGS="-DNNUE_EMBEDDING_OFF -DDEFAULT_NNUE_DIRECTORY=/usr/share/games/stockfish/" make -j ARCH=x86-64 profile-build passed STC non-regression: https://tests.stockfishchess.org/tests/view/5f4a581c150f0aef5f8ae03a LLR: 2.95 (-2.94,2.94) {-1.25,-0.25} Total: 66928 W: 7202 L: 7147 D: 52579 Ptnml(0-2): 291, 5309, 22211, 5360, 293 closes https://github.com/official-stockfish/Stockfish/pull/3070 fixes https://github.com/official-stockfish/Stockfish/issues/3030 No functional change.
2020-08-23 05:43:38 -06:00
Dale Weiler (graphitemaster)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Dan Schmidt (dfannius)
Daniel Axtens (daxtens)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Daniel Dugovic (ddugovic)
Embed default net, and simplify using non-default nets covers the most important cases from the user perspective: It embeds the default net in the binary, so a download of that binary will result in a working engine with the default net. The engine will be functional in the default mode without any additional user action. It allows non-default nets to be used, which will be looked for in up to three directories (working directory, location of the binary, and optionally a specific default directory). This mechanism is also kept for those developers that use MSVC, the one compiler that doesn't have an easy mechanism for embedding data. It is possible to disable embedding, and instead specify a specific directory, e.g. linux distros might want to use CXXFLAGS="-DNNUE_EMBEDDING_OFF -DDEFAULT_NNUE_DIRECTORY=/usr/share/games/stockfish/" make -j ARCH=x86-64 profile-build passed STC non-regression: https://tests.stockfishchess.org/tests/view/5f4a581c150f0aef5f8ae03a LLR: 2.95 (-2.94,2.94) {-1.25,-0.25} Total: 66928 W: 7202 L: 7147 D: 52579 Ptnml(0-2): 291, 5309, 22211, 5360, 293 closes https://github.com/official-stockfish/Stockfish/pull/3070 fixes https://github.com/official-stockfish/Stockfish/issues/3030 No functional change.
2020-08-23 05:43:38 -06:00
Dariusz Orzechowski (dorzechowski)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
David Zar
Daylen Yang (daylen)
Small cleanups 13 No functional change
2020-11-12 06:05:28 -07:00
Deshawn Mohan-Smith (GoldenRare)
Use correct chess terms + fix spelling. - "discovered check" (instead of "discovery check") - "en passant" (instead of "en-passant") - "pseudo-legal" before a noun (instead of "pseudo legal") - "3-fold" (instead of "3fold") closes https://github.com/official-stockfish/Stockfish/pull/3294 No functional change.
2021-01-09 08:46:06 -07:00
Dieter Dobbelaere (ddobbelaere)
Update AUTHORS and copyright notice No functional change Resolves #555
2016-01-02 02:43:25 -07:00
DiscanX
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
Dominik Schlösser (domschl)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
double-beep
Small clean-ups - Comment for Countemove pruning -> Continuation history - Fix comment in input_slice.h - Shorter lines in Makefile - Comment for scale factor - Fix comment for pinners in see_ge() - Change Thread.id() signature to size_t - Trailing space in reprosearch.sh - Add Douglas Matos Gomes to the AUTHORS file - Introduce comment for undo_null_move() - Use Stockfish coding style for export_net() - Change date in AUTHORS file closes https://github.com/official-stockfish/Stockfish/pull/3416 No functional change
2021-05-17 01:13:34 -06:00
Douglas Matos Gomes (dsmsgms)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Eduardo Cáceres (eduherminio)
Eelco de Groot (KingDefender)
Improve the Readme I tried to improve the Readme because many people in my local chess club do not understand some of the UCO options properly. Starting point of this was Cfish's Readme by Ronald de Man, some internet resources and the Stockfish code itself. Closes https://github.com/official-stockfish/Stockfish/pull/1898 Initial commit by user @erbsenzaehler, with help from users Adrian Petrescu, @alayan-stk-2 and Elvin Liu. No functional change Co-Authored-By: Alayan-stk-2 <alayan-stk-2@users.noreply.github.com> Co-Authored-By: Adrian Petrescu <apetresc@gmail.com> Co-Authored-By: Elvin Liu <solarlight2@users.noreply.github.com>
2018-12-29 03:49:10 -07:00
Elvin Liu (solarlight2)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
erbsenzaehler
Update AUTHORS and copyright notice No functional change Resolves #555
2016-01-02 02:43:25 -07:00
Ernesto Gatti
Tuned safe checks and minor piece king protectors A combination of terms related to king safety one tuned safe check weights, the other tuned knight and bishop king protector weights separately with some compensation in the high outpost bonuses given to the minor pieces. passed STC LLR: 2.95 (-2.94,2.94) {-0.50,1.50} Total: 39892 W: 7594 L: 7350 D: 24948 Ptnml(0-2): 643, 4559, 9314, 4771, 659 https://tests.stockfishchess.org/tests/view/5ea49635b908f6dd28f34b82 passed LTC LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 104934 W: 13300 L: 12834 D: 78800 Ptnml(0-2): 697, 9571, 31514, 9939, 746 https://tests.stockfishchess.org/tests/view/5ea4abf6b908f6dd28f34bcb closes https://github.com/official-stockfish/Stockfish/pull/2649 Bench 4800754
2020-04-25 13:55:35 -06:00
Linmiao Xu (linrock)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Fabian Beuke (madnight)
Fabian Fichter (ianfab)
Provide vectorized NNUE code for SSE2 and MMX targets This patch allows old x86 CPUs, from AMD K8 (which the x86-64 baseline targets) all the way down to the Pentium MMX, to benefit from NNUE with comparable performance hit versus hand-written eval as on more modern processors. NPS of the bench with NNUE enabled on a Pentium III 1.13 GHz (using the MMX code): master: 38951 this patch: 80586 NPS of the bench with NNUE enabled using baseline x86-64 arch, which is how linux distros are likely to package stockfish, on a modern CPU (using the SSE2 code): master: 882584 this patch: 1203945 closes https://github.com/official-stockfish/Stockfish/pull/2956 No functional change.
2020-08-09 08:20:45 -06:00
Fanael Linithien (Fanael)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
fanon
Fauzi Akram Dabat (FauziAkram)
Felix Wittmann
gamander
Fix ambiguity between clamp implementations There is an ambiguity between global and std clamp implementations when compiling in c++17, and on certain toolchains that are not strictly conforming to c++11. This is solved by putting our clamp implementation in a namespace. closes https://github.com/official-stockfish/Stockfish/pull/2572 No functional change.
2020-03-05 10:37:08 -07:00
Gary Heckman (gheckman)
Update Makefile for macOS Changes to deal with compilation (particularly profile-build) on macOS. (1) The default toolchain has gcc masquerading as clang, the previous Makefile was not picking up the required changes to the different profiling tools. (2) The previous Makefile test for gccisclang occurred before a potential overwrite of CXX by COMPCXX (3) llvm-profdata no longer runs as a command on macOS and instead is invoked by ``xcrun llvm-profdata`` (4) Needs to support use of true gcc using e.g. ``make build ... COMPCXX=g++-10`` (5) enable profile-build in travis for macOS closes https://github.com/official-stockfish/Stockfish/pull/3043 No functional change
2020-08-21 04:28:53 -06:00
George Sobala (gsobala)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
gguliash
Apply good/bad history reduction also when inCheck Main idea is that, in some cases, 'in check' situations are not so different from 'not in check' ones. Trying to use piece count in order to select only a few 'in check' situations have failed LTC testing. It could be interesting to apply one of those ideas in other parts of the search function. passed STC: https://tests.stockfishchess.org/tests/view/60f1b68dd1189bed71812d40 LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 53472 W: 4078 L: 4008 D: 45386 Ptnml(0-2): 127, 3297, 19795, 3413, 104 passed LTC: https://tests.stockfishchess.org/tests/view/60f291e6d1189bed71812de3 LLR: 2.92 (-2.94,2.94) <-2.50,0.50> Total: 89712 W: 2651 L: 2632 D: 84429 Ptnml(0-2): 60, 2261, 40188, 2294, 53 closes https://github.com/official-stockfish/Stockfish/pull/3619 Bench: 5185789
2021-07-18 12:14:11 -06:00
Giacomo Lorenzetti (G-Lorenz)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Gian-Carlo Pascutto (gcp)
Gontran Lemaire (gonlem)
Goodkov Vasiliy Aleksandrovich (goodkov)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Gregor Cramer
Non-linear bonus for pawn count This patch introduces a non-linear bonus for pawns, along with some (linear) corrections for the other pieces types. The original values were obtained by a massive non-linear tuning of both pawns and other pieces by GuardianRM, while Alain Savard and Chris Cain later simplified the patch by observing that, apart from the pawn case, the tuned corrections were in fact almost affine and could be incorporated in our current code base via the piece values in types.h (offset) and the diagonal of the quadratic matrix (slope). See discussion in PR#1725 : https://github.com/official-stockfish/Stockfish/pull/1725 STC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 42948 W: 9662 L: 9317 D: 23969 http://tests.stockfishchess.org/tests/view/5b6ff6e60ebc5902bdba1d87 LTC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 19683 W: 3409 L: 3206 D: 13068 http://tests.stockfishchess.org/tests/view/5b702dbd0ebc5902bdba216b How to continue from there? - Maybe the non-linearity for the pawn value could be somewhat tempered again and a simpler linear correction for pawns would work? Closes https://github.com/official-stockfish/Stockfish/pull/1734 Bench: 4681496
2018-08-12 10:40:03 -06:00
GuardianRM
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Günther Demetz (pb00067, pb00068)
Guy Vreuls (gvreuls)
Henri Wiechers
Update AUTHORS for SF8 And format top contriutor (space instead of tabs, proper Unix line endings).
2016-11-04 07:39:24 -06:00
Hiraoka Takuya (HiraokaTakuya)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
homoSapiensSapiens
Add AUTHORS
2014-06-20 19:35:09 -06:00
Hongzhi Cheng
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ivan Ivec (IIvec)
Jacques B. (Timshel)
Jan Ondruš (hxim)
Update list of authors No functional change
2018-11-29 07:15:43 -07:00
Jared Kish (Kurtbusch)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Jarrod Torriero (DU-jdto)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Jean Gauthier (OuaisBla)
Update list of authors And also fix some spaces and formatting oddities in the code. No functional change
2018-09-03 04:46:05 -06:00
Jean-Francois Romang (jromang)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Jekaa
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Jerry Donald Watson (jerrydonaldwatson)
Remove unnecessay legality check Possible after the recent reording pos.legal(move) check https://github.com/official-stockfish/Stockfish/pull/2941 No functional change.
2020-08-08 04:07:07 -06:00
jjoshua2
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Jonathan Calovski (Mysseno)
Increase reduction at root when the best move does not change frequently STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 51320 W: 5159 L: 4956 D: 41205 Ptnml(0-2): 215, 3897, 17242, 4082, 224 https://tests.stockfishchess.org/tests/view/5faa072367cbf42301d6a767 LTC: LLR: 2.98 (-2.94,2.94) {0.25,1.25} Total: 15952 W: 762 L: 642 D: 14548 Ptnml(0-2): 8, 561, 6725, 667, 15 https://tests.stockfishchess.org/tests/view/5faa4c3567cbf42301d6a794 closes https://github.com/official-stockfish/Stockfish/pull/3225 Bench: 3954692
2020-11-10 10:28:43 -07:00
Jonathan Buladas Dumale (SFisGOD)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Joost VandeVondele (vondele)
Jörg Oster (joergoster)
Using a S-curve for the optimism measure Add a logarithmic term in the optimism computation, increase the maximal optimism and lower the contempt offset. This increases the dynamics of the optimism aspects, giving a boost for balanced positions without skewing too much on unbalanced positions (but this version will enter panic mode faster than previous master when behind, trying to draw faster when slightly behind). This helps, since optimism is in general a good thing, for instance at LTC, but too high optimism rapidly contaminates play. passed STC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 159343 W: 34489 L: 33588 D: 91266 http://tests.stockfishchess.org/tests/view/5a8db9340ebc590297cc85b6 passed LTC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 47491 W: 7825 L: 7517 D: 32149 http://tests.stockfishchess.org/tests/view/5a9456a80ebc590297cc8a89 It must be mentioned that a version of the PR with contempt 0 did not pass STC [0,5]. The version in the patch, which uses default contempt 12, was found to be as strong as current master on different matches against SF7 and SF8, both at STC and LTC. One drawback maybe is that it raises the draw rate in self-play from 56% to 59%, giving a little bit less sensitivity for SF developpers to find evaluation improvements by selfplay tests in fishtest. Possible further work: • tune the values accurately, while keeping in mind the drawrate issue • check whether it is possible to remove linear and offset term • try to simplify the S-shape curve Bench: 5934644
2018-03-04 08:50:19 -07:00
Joseph Ellis (jhellis3)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Joseph R. Prostko
Update default net to nn-8e47cf062333.nnue This net is the result of training on data used by the Leela project. More precisely, we shuffled T60 and T74 data kindly provided by borg (for different Tnn, the data is a result of Leela selfplay with differently sized Leela nets). The data is available at vondele's google drive: https://drive.google.com/drive/folders/1mftuzYdl9o6tBaceR3d_VBQIrgKJsFpl. The Leela data comes in small chunks of .binpack files. To shuffle them, we simply used a small python script to randomly rename the files, and then concatenated them using `cat`. As validation data we picked a file of T60 data. We will further investigate T74 data. The training for the NNUE architecture used 200 epochs with the Python trainer from the Stockfish project. Unlike the previous run we tried with this data, this run does not have adjusted scaling — not because we didn't want to, but because we forgot. However, this training randomly skips 40% more positions than previous run. The loss was very spiky and decreased slower than it does usually. Training loss: https://github.com/official-stockfish/images/blob/main/training-loss-8e47cf062333.png Validation loss: https://github.com/official-stockfish/images/blob/main/validation-loss-8e47cf062333.png This is the exact training command: python train.py --smart-fen-skipping --random-fen-skipping 14 --batch-size 16384 --threads 4 --num-workers 4 --gpus 1 trainingdata\training_data.binpack validationdata\val.binpack --- 10k STC result: ELO: 3.61 +-3.3 (95%) LOS: 98.4% Total: 10000 W: 1241 L: 1137 D: 7622 Ptnml(0-2): 68, 841, 3086, 929, 76 https://tests.stockfishchess.org/tests/view/60c67e50457376eb8bcaae70 10k LTC result: ELO: 2.71 +-2.4 (95%) LOS: 98.8% Total: 10000 W: 659 L: 581 D: 8760 Ptnml(0-2): 22, 485, 3900, 579, 14 https://tests.stockfishchess.org/tests/view/60c69deb457376eb8bcaae98 Passed LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 9648 W: 685 L: 545 D: 8418 Ptnml(0-2): 22, 448, 3740, 596, 18 https://tests.stockfishchess.org/tests/view/60c6d41c457376eb8bcaaecf --- closes https://github.com/official-stockfish/Stockfish/pull/3550 Bench: 4877339
2021-06-13 15:48:32 -06:00
Julian Willemer (NightlyKing)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
jundery
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Justin Blanchard (UncombedCoconut)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Kelly Wilson
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ken Takusagawa
kinderchocolate
Kiran Panditrao (Krgp)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Kojirion
Change lock type No additional features of std::unique_lock has been previously used so it's better to use a lighter lock. closes https://github.com/official-stockfish/Stockfish/pull/3284 No functional change.
2020-12-31 09:00:39 -07:00
Krystian Kuzniarek (kuzkry)
Update list of authors No functional change
2018-11-29 07:15:43 -07:00
Leonardo Ljubičić (ICCF World Champion)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Leonid Pechenik (lp--)
Add macOS and windows to CI - macOS - system clang - gcc - windows / msys2 - mingw 64-bit gcc - mingw 32-bit gcc - minor code fixes to get new CI jobs to pass - code: suppress unused-parameter warning on 32-bit windows - Makefile: if arch=any on macos, don't specify arch at all fixes https://github.com/official-stockfish/Stockfish/issues/2958 closes https://github.com/official-stockfish/Stockfish/pull/3623 No functional change
2021-07-21 01:33:13 -06:00
Liam Keegan (lkeegan)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Linus Arver (listx)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
loco-loco
Remove Overload bonus Compensate by giving the Hanging bonus to weak doubly-attacked non pawn enemies pieces. STC: http://tests.stockfishchess.org/tests/view/5bfd53c40ebc5902bced9237 LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 62107 W: 13664 L: 13622 D: 34821 LTC: http://tests.stockfishchess.org/tests/view/5bfd74700ebc5902bced9618 LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 86406 W: 14381 L: 14365 D: 57660 A possible follow up would be to tune the hanging bonus and/or try to simplify the hanging bonus condition. Bench: 3810849
2018-12-01 02:28:10 -07:00
Lub van den Berg (ElbertoOne)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Luca Brivio (lucabrivio)
Lucas Braesch (lucasart)
Lyudmil Antonov (lantonov)
Assorted trivial cleanups (July 2019) No functional change
2019-08-14 14:15:41 -06:00
Maciej Żenczykowski (zenczykowski)
Smarter time management near stop limit This patch makes Stockfish search same depth again if > 60% of optimum time is already used, instead of trying the next iteration. The idea is that the next iteration will generally take about the same amount of time as has already been used in total. When we are likely to begin the last iteration, as judged by total time taken so far > 0.6 * optimum time, searching the last depth again instead of increasing the depth still helps the other threads in lazy SMP and prepares better move ordering for the next moves. STC : LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 13436 W: 2695 L: 2558 D: 8183 Ptnml(0-2): 222, 1538, 3087, 1611, 253 https://tests.stockfishchess.org/tests/view/5e1618a761fe5f83a67dd964 LTC : LLR: 2.94 (-2.94,2.94) {0.00,2.00} Total: 32160 W: 4261 L: 4047 D: 23852 Ptnml(0-2): 211, 2988, 9448, 3135, 247 https://tests.stockfishchess.org/tests/view/5e162ca061fe5f83a67dd96d The code was revised as suggested by @vondele for multithreading: STC (8 threads): LLR: 2.95 (-2.94,2.94) {0.00,2.00} Total: 16640 W: 2049 L: 1885 D: 12706 Ptnml(0-2): 119, 1369, 5158, 1557, 108 https://tests.stockfishchess.org/tests/view/5e19826a2cc590e03c3c2f52 LTC (8 threads): LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 16536 W: 2758 L: 2629 D: 11149 Ptnml(0-2): 182, 1758, 4296, 1802, 224 https://tests.stockfishchess.org/tests/view/5e18b91a27dab692fcf9a140 Thanks to those discussing Stockfish lazy SMP on fishcooking which made me try this, and to @vondele for suggestions and doing related tests. See full discussion in the pull request thread: https://github.com/official-stockfish/Stockfish/pull/2482 Bench: 4586187
2020-01-11 15:10:22 -07:00
Malcolm Campbell (xoto10)
Introduce Overload This patch applies a S(10, 5) bonus for every square that is: - Occupied by an enemy piece which is not a pawn - Attacked exactly once by our pieces - Defended exactly once by enemy pieces The idea is that these pieces must be defended. Their defenders have dramatically limited mobility, and they are vulnerable to our future attack. As with connectivity, there are probably many more tests to be run in this area. In particular: - I believe @snicolet's queen overload tests have demonstrated a potential need for a queen overload bonus above and beyond this one; however, the conditions for "overload" in this patch are different (excluding pieces we attack twice). My next test after this is (hopefully) merged will be to intersect the Bitboard I define here with the enemy's queen attacks and attempt to give additional bonus. - Perhaps we should exclude pieces attacked by pawns--can pawns really be overloaded? Should they have the same weight, or less? This didn't work with a previous version, but it could work with this one. - More generally, different pieces may need more or less bonus. We could change bonuses based on what type of enemy piece is being overloaded, what type of friendly piece is attacking, and/or what type of piece is being defended by the overloaded piece and attacked by us, or any intersection of these three. For example, here attacked/defended pawns are excluded, but they're not totally worthless targets, and could be added again with a smaller bonus. - This list is by no means exhaustive. STC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 17439 W: 3599 L: 3390 D: 10450 http://tests.stockfishchess.org/tests/view/5ac78a2e0ebc59435923735e LTC: LLR: 2.95 (-2.94,2.94) [0.00,5.00] Total: 43304 W: 6533 L: 6256 D: 30515 http://tests.stockfishchess.org/tests/view/5ac7a1d80ebc59435923736f Closes https://github.com/official-stockfish/Stockfish/pull/1533 Bench: 5248871 ---------------- This is my first time opening a PR, so I apologize if there are errors. There are too many people to thank since I submitted my first test just over a month ago. Thank you all for the warm welcome and here is to more green patches! In particular, I would like to thank: - @crossbr, whose comment in a FishCooking thread first inspired me to consider the overloading of pieces other than queens, - @snicolet, whose queen overload tests inspired this one and served as the base of my first overload attempts, - @protonspring, whose connectivity tests inspired this one and who provided much of the feedback needed to take this from red to green, - @vondele, who kindly corrected me when I submitted a bad LTC test, - @Rocky640, who has helped me over and over again in the past month. Thank you all!
2018-04-06 17:20:48 -06:00
Mark Tenzer (31m059)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
marotear
Better code for hash table generation This patch removes some magic numbers in TT bit management and introduce proper constants in the code, to improve documentation and ease further modifications. No function change
2021-02-11 14:29:28 -07:00
Matt Ginsberg (mattginsberg)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Matthew Lai (matthewlai)
Matthew Sullivan (Matt14916)
Calculate sum from first elements in affine transform for AVX512/AVX2/SSSE3 The idea is to initialize sum with the first element instead of zero. Reduce one add_epi32 and one set_zero SIMD instructions for each output dimension. sum = 0; for i = 1 to n sum += a[i] -> sum = a[1]; for i = 2 to n sum += a[i] STC: LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 69048 W: 7024 L: 6799 D: 55225 Ptnml(0-2): 260, 5175, 23458, 5342, 289 https://tests.stockfishchess.org/tests/view/5faf2cf467cbf42301d6aa06 closes https://github.com/official-stockfish/Stockfish/pull/3227 No functional change.
2020-11-13 17:55:29 -07:00
Maxim Molchanov (Maxim)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Michael An (man)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Michael Byrne (MichaelB7)
Update list of authors And also fix some spaces and formatting oddities in the code. No functional change
2018-09-03 04:46:05 -06:00
Michael Chaly (Vizvezdenec)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Michael Stembera (mstembera)
Michael Whiteley (protonspring)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Michel Van den Bergh (vdbergh)
Use single value for KingProtector. After some recent big tuning session, the values for King Protector were simplified to only be used on minor pieces. This patch tries to further simplify by just using a single value, since current S(6,5) and S(5,6) are close to each other. The value S(6,6) ended up passing, although S(5,5) was also tried and failed STC. STC LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 14261 W: 3288 L: 3151 D: 7822 http://tests.stockfishchess.org/tests/view/5b4ccdf50ebc5902bdb77f65 LTC LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 19606 W: 3396 L: 3273 D: 12937 http://tests.stockfishchess.org/tests/view/5b4ce4280ebc5902bdb7803b Bench: 5448998
2018-07-16 10:51:43 -06:00
Miguel Lahoz (miguel-l)
qsearch(): remove inCheck as a template parameter Simplifies a bit, and avoids bugs as in #1478 Passed STC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 104862 W: 21302 L: 21337 D: 62223 http://tests.stockfishchess.org/tests/view/5aa6de1b0ebc590297810097 Closes https://github.com/official-stockfish/Stockfish/pull/1484 No functional change
2018-03-13 01:10:59 -06:00
Mikael Bäckman (mbootsector)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Mira
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Miroslav Fontán (Hexik)
Penalty for bad bishop with blocked central files We increase the penalty for bad bishops by a factor proportional to the number of our blocked pawns in the center files C, D, E or F. STC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 8868 W: 1870 L: 1700 D: 5298 http://tests.stockfishchess.org/html/live_elo.html?5ae7674f0ebc590e39268b34 LTC: LLR: 2.95 (-2.94,2.94) [0.00,5.00] Total: 5813 W: 950 L: 808 D: 4055 http://tests.stockfishchess.org/html/live_elo.html?5ae77bae0ebc5926dba90dd9 Closes https://github.com/official-stockfish/Stockfish/pull/1573 Bench: 5364190
2018-04-30 23:12:17 -06:00
Moez Jellouli (MJZ1977)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Mohammed Li (tthsqe12)
Nathan Rugg (nmrugg)
Clarify the mapping of files to queenside This patch replaces the obscure expressions mapping files ABCDEFGH to ABCDDCBA by explicite calls to an auxiliary function: old: f = min(f, ~f) new: f = map_to_queenside(f) We used the Golbolt web site (https://godbolt.org) to check that the current code for the auxiliary function is optimal. STC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 30292 W: 6756 L: 6651 D: 16885 http://tests.stockfishchess.org/tests/view/5d8676720ebc5971531d6aa1 Achieved with a bit of help from Sopel97, snicolet and vondele, thanks everyone! Closes https://github.com/official-stockfish/Stockfish/pull/2325 No functional change
2019-09-21 01:59:32 -06:00
Nick Pelling (nickpelling)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Nicklas Persson (NicklasPersson)
Niklas Fiekas (niklasf)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Nikolay Kostov (NikolayIT)
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
Nguyen Pham (nguyenpham)
Norman Schmidt (FireFather)
Support building for Android using NDK The easiest way to use the NDK in conjunction with this Makefile (tested on linux-x86_64): 1. Download the latest NDK (r21d) from Google from https://developer.android.com/ndk/downloads 2. Place and unzip the NDK in $HOME/ndk folder 3. Export the path variable e.g., `export PATH=$PATH:$HOME/ndk/android-ndk-r21d/toolchains/llvm/prebuilt/linux-x86_64/bin` 4. cd to your Stockfish/src dir 5. Issue `make -j ARCH=armv8 COMP=ndk build` (use `ARCH=armv7` or `ARCH=armv7-neon` for older CPUs) 6. Optionally `make -j ARCH=armv8 COMP=ndk strip` 7. That's all. Enjoy! Improves support from Raspberry Pi (incomplete?) and compiling on arm in general closes https://github.com/official-stockfish/Stockfish/pull/3015 fixes https://github.com/official-stockfish/Stockfish/issues/2860 fixes https://github.com/official-stockfish/Stockfish/issues/2641 Support is still fragile as we're missing CI on these targets. Nevertheless tested with: ```bash # build crosses from ubuntu 20.04 on x86 to various arch/OS combos # tested with suitable packages installed # (build-essentials, mingw-w64, g++-arm-linux-gnueabihf, NDK (r21d) from google) # cross to Android export PATH=$HOME/ndk/android-ndk-r21d/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH make clean && make -j build ARCH=armv7 COMP=ndk && make -j build ARCH=armv7 COMP=ndk strip make clean && make -j build ARCH=armv7-neon COMP=ndk && make -j build ARCH=armv7-neon COMP=ndk strip make clean && make -j build ARCH=armv8 COMP=ndk && make -j build ARCH=armv8 COMP=ndk strip # cross to Raspberry Pi make clean && make -j build ARCH=armv7 COMP=gcc COMPILER=arm-linux-gnueabihf-g++ make clean && make -j build ARCH=armv7-neon COMP=gcc COMPILER=arm-linux-gnueabihf-g++ # cross to Windows make clean && make -j build ARCH=x86-64-modern COMP=mingw ``` No functional change
2020-08-16 09:59:13 -06:00
notruck
Range reductions adding reductions for when the delta between the static eval and the child's eval is consistently low. passed STC https://tests.stockfishchess.org/html/live_elo.html?614d7b3c7bdc23e77ceb8a5d LLR: 2.95 (-2.94,2.94) <-0.50,2.50> Total: 88872 W: 22672 L: 22366 D: 43834 Ptnml(0-2): 343, 10150, 23117, 10510, 316 passed LTC https://tests.stockfishchess.org/html/live_elo.html?614daf3e7bdc23e77ceb8a82 LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 24368 W: 6153 L: 5928 D: 12287 Ptnml(0-2): 13, 2503, 6937, 2708, 23 closes https://github.com/official-stockfish/Stockfish/pull/3717 Bench: 5443950
2021-09-23 14:16:17 -06:00
Ofek Shochat (OfekShochat, ghostway)
Update list of authors And also fix some spaces and formatting oddities in the code. No functional change
2018-09-03 04:46:05 -06:00
Ondrej Mosnáček (WOnder93)
Update AUTHORS and copyright notice No functional change Resolves #555
2016-01-02 02:43:25 -07:00
Oskar Werkelin Ahlin
Add AUTHORS
2014-06-20 19:35:09 -06:00
Pablo Vazquez
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Panthee
Update AUTHORS and copyright notice No functional change Resolves #555
2016-01-02 02:43:25 -07:00
Pascal Romaret
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Pasquale Pigazzini (ppigazzini)
Patrick Jansen (mibere)
pellanda
NUMA for 9 threads or more Enable numa machinery only for STRICTLY MORE than 8 threads. Reason for this change is that nowadays SMP tests are always done with 8 threads. That is a problem for multi-socket Windows machines running on fishtest. No functional change
2018-09-04 05:36:42 -06:00
Peter Zsifkovits (CoffeeOne)
Movecount pruning reduction logic This patch refines search reduction logic in case the position is not a former PV node and is pruned based on move count. passed STC https://tests.stockfishchess.org/tests/view/5e8092bde42a5c3b3ca2ed35 LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 78848 W: 15480 L: 15170 D: 48198 Ptnml(0-2): 1406, 9310, 17773, 9438, 1497 passed LTC https://tests.stockfishchess.org/tests/view/5e80bb13e42a5c3b3ca2ed4b LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 86596 W: 11451 L: 11033 D: 64112 Ptnml(0-2): 624, 7993, 25687, 8329, 665 closes https://github.com/official-stockfish/Stockfish/pull/2605 Bench: 5138771
2020-03-29 22:52:42 -06:00
Praveen Kumar Tummala (praveentml)
Remove set statScore to zero Simplification. Removes setting statScore to zero if negative. STC: LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 84820 W: 16100 L: 16033 D: 52687 Ptnml(0-2): 1442, 9865, 19723, 9944, 1436 https://tests.stockfishchess.org/tests/view/5e654fdae42a5c3b3ca2e2f8 LTC: LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 57658 W: 7435 L: 7391 D: 42832 Ptnml(0-2): 441, 5397, 17104, 5451, 436 https://tests.stockfishchess.org/tests/view/5e657ce9e42a5c3b3ca2e307 closes https://github.com/official-stockfish/Stockfish/pull/2578 Bench: 5168890
2020-03-08 13:52:05 -06:00
Rahul Dsilva (silversolver1)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ralph Stößer (Ralph Stoesser)
Add AUTHORS
2014-06-20 19:35:09 -06:00
Raminder Singh
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
renouve
Reuven Peleg
Add AUTHORS
2014-06-20 19:35:09 -06:00
Richard Lloyd
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Rodrigo Exterckötter Tjäder
Update list of authors And also fix some spaces and formatting oddities in the code. No functional change
2018-09-03 04:46:05 -06:00
Ron Britvich (Britvich)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Ronald de Man (syzygy1, syzygy)
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
rqs
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Ryan Schmitt
Add AUTHORS
2014-06-20 19:35:09 -06:00
Ryan Takker
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Sami Kiminki (skiminki)
Update list of authors No functional change
2018-11-29 07:15:43 -07:00
Sebastian Buchwald (UniQP)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Sergei Antonov (saproj)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Sergei Ivanov (svivanov72)
Update default net to nn-9931db908a9b.nnue Net created at 20200806-1802 passed STC: https://tests.stockfishchess.org/tests/view/5f2d00b461e3b6af64881f21 LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 6672 W: 1052 L: 898 D: 4722 Ptnml(0-2): 63, 600, 1868, 730, 75 passed LTC: https://tests.stockfishchess.org/tests/view/5f2d052a61e3b6af64881f29 LLR: 2.96 (-2.94,2.94) {0.25,1.75} Total: 7576 W: 573 L: 463 D: 6540 Ptnml(0-2): 8, 392, 2889, 480, 19 closes https://github.com/official-stockfish/Stockfish/pull/2923 Bench: 4390086
2020-08-07 01:15:04 -06:00
Sergio Vieri (sergiovieri)
Update AUTHORS and copyright notice No functional change Resolves #555
2016-01-02 02:43:25 -07:00
sf-x
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Shane Booth (shane31)
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
Shawn Varghese (xXH4CKST3RXx)
Change advanced pawn push threshold A pawn push is now considered to be "advanced" if the relative destination rank is > 6 (previously it was > 5). This affects the search heuristic. Also remove an assert concerning en passant moves in qsearch(). STC: LLR: 2.97 (-2.94,2.94) {-0.25,1.25} Total: 46744 W: 4224 L: 4040 D: 38480 Ptnml(0-2): 165, 3206, 16451, 3380, 170 https://tests.stockfishchess.org/tests/view/604746082433018de7a3872e LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 107840 W: 4198 L: 3892 D: 99750 Ptnml(0-2): 58, 3472, 46557, 3772, 61 https://tests.stockfishchess.org/tests/view/60475eae2433018de7a38737 Closes https://github.com/official-stockfish/Stockfish/pull/3389 Bench: 4796780
2021-03-08 11:46:41 -07:00
Siad Daboul (Topologist)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Stefan Geschwentner (locutus2)
Stefano Cardanobile (Stefano80)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Steinar Gunderson (sesse)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Stéphane Nicolet (snicolet)
Use if instead of goto This PR inverts the if and removes goto in the generate_all function. closes https://github.com/official-stockfish/Stockfish/pull/3461 No functional change
2021-05-12 12:15:21 -06:00
Prokop Randáček (ProkopRandacek)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Thanar2
Add AUTHORS
2014-06-20 19:35:09 -06:00
thaspel
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
theo77186
Tom Truscott
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Tom Vijlbrief (tomtor)
Use a trivially copyable struct for TBTables::Entry instead of a tuple. fixes https://github.com/official-stockfish/Stockfish/issues/2673 which is a warning issued by recent gcc (10.1) closes https://github.com/official-stockfish/Stockfish/pull/2674 No functional change
2020-05-12 13:41:55 -06:00
Tomasz Sobczyk (Sopel97)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Torsten Franz (torfranz, tfranzer)
Update default net to nn-ac5605a608d6.nnue This net was created with the nnue-pytorch trainer, it used the previous master net as a starting point. The training data includes all T60 data (https://drive.google.com/drive/folders/1rzZkgIgw7G5vQMLr2hZNiUXOp7z80613), all T74 data (https://drive.google.com/drive/folders/1aFUv3Ih3-A8Vxw9064Kw_FU4sNhMHZU-) and the wrongNNUE_02_d9.binpack (https://drive.google.com/file/d/1seGNOqcVdvK_vPNq98j-zV3XPE5zWAeq). The Leela data were randomly named and then concatenated. All data was merged into one binpack using interleave_binpacks.py. python3 train.py \ ../data/t60_t74_wrong.binpack \ ../data/t60_t74_wrong.binpack \ --resume-from-model ../data/nn-e8321e467bf6.pt \ --gpus 1 \ --threads 4 \ --num-workers 1 \ --batch-size 16384 \ --progress_bar_refresh_rate 300 \ --random-fen-skipping 3 \ --features=HalfKAv2_hm^ \ --lambda=1.0 \ --max_epochs=600 \ --seed $RANDOM \ --default_root_dir ../output/exp_24 STC: LLR: 2.95 (-2.94,2.94) <-0.50,2.50> Total: 15320 W: 1415 L: 1257 D: 12648 Ptnml(0-2): 50, 1002, 5402, 1152, 54 https://tests.stockfishchess.org/tests/view/611c404a4977aa1525c9c97f LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 9440 W: 345 L: 248 D: 8847 Ptnml(0-2): 3, 222, 4175, 315, 5 https://tests.stockfishchess.org/tests/view/611c6c7d4977aa1525c9c996 LTC with UHO_XXL_+0.90_+1.19.epd: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 6232 W: 1638 L: 1459 D: 3135 Ptnml(0-2): 5, 592, 1744, 769, 6 https://tests.stockfishchess.org/tests/view/611c9b214977aa1525c9c9cb closes https://github.com/official-stockfish/Stockfish/pull/3664 Bench: 5375286
2021-08-18 01:12:14 -06:00
Torsten Hellwig (Torom)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Tracey Emery (basepr1me)
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
tttak
Makefile: support lto on mingw, default to 64bits Clean and organize uppercase and spaces fixes https://github.com/official-stockfish/Stockfish/issues/2731 closes https://github.com/official-stockfish/Stockfish/pull/2763 No functional change
2020-06-23 09:56:38 -06:00
Unai Corzo (unaiic)
Update list of authors after Stockfish 9 No functional change.
2018-02-17 17:51:35 -07:00
Uri Blass (uriblass)
Update lists of authors and contributors Preparing for version 11 of Stockfish: update lists of authors, contributors giving CPU time to the fishtest framework, etc. No functional change
2020-01-07 13:35:47 -07:00
Vince Negri (cuddlestmonkey)
Simplify Skill implementation Currently we handle the UCI_Elo with a double randomization. This seems not necessary and a bit involuted. This patch removes the first randomization and unifies the 2 cases. closes https://github.com/official-stockfish/Stockfish/pull/3769 No functional change.
2021-10-10 06:03:51 -06:00
xefoci7612
Add NNUE evaluation This patch ports the efficiently updatable neural network (NNUE) evaluation to Stockfish. Both the NNUE and the classical evaluations are available, and can be used to assign a value to a position that is later used in alpha-beta (PVS) search to find the best move. The classical evaluation computes this value as a function of various chess concepts, handcrafted by experts, tested and tuned using fishtest. The NNUE evaluation computes this value with a neural network based on basic inputs. The network is optimized and trained on the evalutions of millions of positions at moderate search depth. The NNUE evaluation was first introduced in shogi, and ported to Stockfish afterward. It can be evaluated efficiently on CPUs, and exploits the fact that only parts of the neural network need to be updated after a typical chess move. [The nodchip repository](https://github.com/nodchip/Stockfish) provides additional tools to train and develop the NNUE networks. This patch is the result of contributions of various authors, from various communities, including: nodchip, ynasu87, yaneurao (initial port and NNUE authors), domschl, FireFather, rqs, xXH4CKST3RXx, tttak, zz4032, joergoster, mstembera, nguyenpham, erbsenzaehler, dorzechowski, and vondele. This new evaluation needed various changes to fishtest and the corresponding infrastructure, for which tomtor, ppigazzini, noobpwnftw, daylen, and vondele are gratefully acknowledged. The first networks have been provided by gekkehenker and sergiovieri, with the latter net (nn-97f742aaefcd.nnue) being the current default. The evaluation function can be selected at run time with the `Use NNUE` (true/false) UCI option, provided the `EvalFile` option points the the network file (depending on the GUI, with full path). The performance of the NNUE evaluation relative to the classical evaluation depends somewhat on the hardware, and is expected to improve quickly, but is currently on > 80 Elo on fishtest: 60000 @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f28fe6ea5abc164f05e4c4c ELO: 92.77 +-2.1 (95%) LOS: 100.0% Total: 60000 W: 24193 L: 8543 D: 27264 Ptnml(0-2): 609, 3850, 9708, 10948, 4885 40000 @ 20+0.2 th 8 https://tests.stockfishchess.org/tests/view/5f290229a5abc164f05e4c58 ELO: 89.47 +-2.0 (95%) LOS: 100.0% Total: 40000 W: 12756 L: 2677 D: 24567 Ptnml(0-2): 74, 1583, 8550, 7776, 2017 At the same time, the impact on the classical evaluation remains minimal, causing no significant regression: sprt @ 10+0.1 th 1 https://tests.stockfishchess.org/tests/view/5f2906a2a5abc164f05e4c5b LLR: 2.94 (-2.94,2.94) {-6.00,-4.00} Total: 34936 W: 6502 L: 6825 D: 21609 Ptnml(0-2): 571, 4082, 8434, 3861, 520 sprt @ 60+0.6 th 1 https://tests.stockfishchess.org/tests/view/5f2906cfa5abc164f05e4c5d LLR: 2.93 (-2.94,2.94) {-6.00,-4.00} Total: 10088 W: 1232 L: 1265 D: 7591 Ptnml(0-2): 49, 914, 3170, 843, 68 The needed networks can be found at https://tests.stockfishchess.org/nns It is recommended to use the default one as indicated by the `EvalFile` UCI option. Guidelines for testing new nets can be found at https://github.com/glinscott/fishtest/wiki/Creating-my-first-test#nnue-net-tests Integration has been discussed in various issues: https://github.com/official-stockfish/Stockfish/issues/2823 https://github.com/official-stockfish/Stockfish/issues/2728 The integration branch will be closed after the merge: https://github.com/official-stockfish/Stockfish/pull/2825 https://github.com/official-stockfish/Stockfish/tree/nnue-player-wip closes https://github.com/official-stockfish/Stockfish/pull/2912 This will be an exciting time for computer chess, looking forward to seeing the evolution of this approach. Bench: 4746616
2020-08-05 09:11:15 -06:00
zz4032
Acknowledge fishtest authors Explicitly acknowledge fishtest authors. Their efforts are almost invisible, but essential for the project. Many thanks to https://github.com/glinscott/fishtest/blob/master/AUTHORS ! No functional change.
2019-09-22 08:56:36 -06:00
Smarter time management near stop limit This patch makes Stockfish search same depth again if > 60% of optimum time is already used, instead of trying the next iteration. The idea is that the next iteration will generally take about the same amount of time as has already been used in total. When we are likely to begin the last iteration, as judged by total time taken so far > 0.6 * optimum time, searching the last depth again instead of increasing the depth still helps the other threads in lazy SMP and prepares better move ordering for the next moves. STC : LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 13436 W: 2695 L: 2558 D: 8183 Ptnml(0-2): 222, 1538, 3087, 1611, 253 https://tests.stockfishchess.org/tests/view/5e1618a761fe5f83a67dd964 LTC : LLR: 2.94 (-2.94,2.94) {0.00,2.00} Total: 32160 W: 4261 L: 4047 D: 23852 Ptnml(0-2): 211, 2988, 9448, 3135, 247 https://tests.stockfishchess.org/tests/view/5e162ca061fe5f83a67dd96d The code was revised as suggested by @vondele for multithreading: STC (8 threads): LLR: 2.95 (-2.94,2.94) {0.00,2.00} Total: 16640 W: 2049 L: 1885 D: 12706 Ptnml(0-2): 119, 1369, 5158, 1557, 108 https://tests.stockfishchess.org/tests/view/5e19826a2cc590e03c3c2f52 LTC (8 threads): LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 16536 W: 2758 L: 2629 D: 11149 Ptnml(0-2): 182, 1758, 4296, 1802, 224 https://tests.stockfishchess.org/tests/view/5e18b91a27dab692fcf9a140 Thanks to those discussing Stockfish lazy SMP on fishcooking which made me try this, and to @vondele for suggestions and doing related tests. See full discussion in the pull request thread: https://github.com/official-stockfish/Stockfish/pull/2482 Bench: 4586187
2020-01-11 15:10:22 -07:00
Tweak futility pruning constants Based on recent improvement of futility pruning by @locutus2 : we lower the futility margin to apply it for more nodes but as a compensation we also lower the history threshold to apply it to less nodes. Further work in tweaking constants can always be done - numbers are guessed "by hand" and are not results of some tuning, maybe there is some more Elo to squeeze from this part of code. Passed STC LLR: 2.98 (-2.94,2.94) {-1.00,3.00} Total: 15300 W: 3081 L: 2936 D: 9283 Ptnml(0-2): 260, 1816, 3382, 1900, 290 http://tests.stockfishchess.org/tests/view/5e18da3b27dab692fcf9a158 Passed LTC LLR: 2.94 (-2.94,2.94) {0.00,2.00} Total: 108670 W: 14509 L: 14070 D: 80091 Ptnml(0-2): 813, 10259, 31736, 10665, 831 http://tests.stockfishchess.org/tests/view/5e18fc9627dab692fcf9a180 Bench: 4643972
2020-01-12 16:59:06 -07:00
# Additionally, we acknowledge the authors and maintainers of fishtest,
Smarter time management near stop limit This patch makes Stockfish search same depth again if > 60% of optimum time is already used, instead of trying the next iteration. The idea is that the next iteration will generally take about the same amount of time as has already been used in total. When we are likely to begin the last iteration, as judged by total time taken so far > 0.6 * optimum time, searching the last depth again instead of increasing the depth still helps the other threads in lazy SMP and prepares better move ordering for the next moves. STC : LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 13436 W: 2695 L: 2558 D: 8183 Ptnml(0-2): 222, 1538, 3087, 1611, 253 https://tests.stockfishchess.org/tests/view/5e1618a761fe5f83a67dd964 LTC : LLR: 2.94 (-2.94,2.94) {0.00,2.00} Total: 32160 W: 4261 L: 4047 D: 23852 Ptnml(0-2): 211, 2988, 9448, 3135, 247 https://tests.stockfishchess.org/tests/view/5e162ca061fe5f83a67dd96d The code was revised as suggested by @vondele for multithreading: STC (8 threads): LLR: 2.95 (-2.94,2.94) {0.00,2.00} Total: 16640 W: 2049 L: 1885 D: 12706 Ptnml(0-2): 119, 1369, 5158, 1557, 108 https://tests.stockfishchess.org/tests/view/5e19826a2cc590e03c3c2f52 LTC (8 threads): LLR: 2.95 (-2.94,2.94) {-1.00,3.00} Total: 16536 W: 2758 L: 2629 D: 11149 Ptnml(0-2): 182, 1758, 4296, 1802, 224 https://tests.stockfishchess.org/tests/view/5e18b91a27dab692fcf9a140 Thanks to those discussing Stockfish lazy SMP on fishcooking which made me try this, and to @vondele for suggestions and doing related tests. See full discussion in the pull request thread: https://github.com/official-stockfish/Stockfish/pull/2482 Bench: 4586187
2020-01-11 15:10:22 -07:00
# an amazing and essential framework for the development of Stockfish!
#
Acknowledge fishtest authors Explicitly acknowledge fishtest authors. Their efforts are almost invisible, but essential for the project. Many thanks to https://github.com/glinscott/fishtest/blob/master/AUTHORS ! No functional change.
2019-09-22 08:56:36 -06:00
# https://github.com/glinscott/fishtest/blob/master/AUTHORS