564c319fbc
loading machine state, few opts needed
2021-11-16 20:54:18 -07:00
c27b3a4829
check
2021-11-16 20:38:45 -07:00
9906cc4d2c
run fast
2021-11-16 20:37:49 -07:00
122e1226e9
Load/store machine cycles
2021-11-16 20:24:04 -07:00
ebec9825c7
ignore ram files
2021-11-16 20:20:11 -07:00
7686146253
is 50m
2021-11-16 20:07:01 -07:00
7577e70a4e
set date inside machine
2021-11-16 20:03:10 -07:00
9a51c05385
Store machine state
2021-11-16 20:02:53 -07:00
62ba4a4524
less ram, smaller disk
2021-11-16 19:17:02 -07:00
98b2d14488
it.is.alive.
2021-11-16 18:46:12 -07:00
8ada4f0c16
build & run cartesi machine
2021-11-16 18:38:37 -07:00
c5c4c696dc
riscv64 build, disables many tests XXX
2021-11-16 18:21:37 -07:00
c3f8cf021e
Stockfish Cartesi README
2021-11-16 18:18:52 -07:00
bbeed09ac5
fork
2021-11-16 18:06:36 -07:00
f5df517145
Simplify Pv nodes related logic in LMR
...
Instead of having 2 separate conditions for Pv nodes reductions we can actually write them together. Despite it's not being strictly logically the same bench actually doesn't change up to depth 20, so them interacting is really rare and thus it's just a removal of extra PvNode check most of the time.
passed STC:
https://tests.stockfishchess.org/tests/view/618ce27cd7a085ad008ef4e9
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 37488 W: 9424 L: 9279 D: 18785
Ptnml(0-2): 90, 3903, 10634, 4006, 111
passed LTC:
https://tests.stockfishchess.org/tests/view/618d2585d7a085ad008ef527
LLR: 2.95 (-2.94,2.94) <-2.25,0.25>
Total: 49968 W: 12449 L: 12331 D: 25188
Ptnml(0-2): 27, 4745, 15309, 4889, 14
closes https://github.com/official-stockfish/Stockfish/pull/3792
Bench: 6339548
2021-11-15 18:20:10 +01:00
9048ac00db
Fix processor group binding under Windows.
...
Starting with Windows Build 20348 the behavior of the numa API has been changed:
https://docs.microsoft.com/en-us/windows/win32/procthread/numa-support
Old code only worked because there was probably a limit on how many
cores/threads can reside within one NUMA node, and the OS creates extra NUMA
nodes when necessary, however the actual mechanism of core binding is
done by "Processor Groups"(https://docs.microsoft.com/en-us/windows/win32/procthread/processor-groups ). With a newer OS, one NUMA node can have many
such "Processor Groups" and we should just consistently use the number
of groups to bind the threads instead of deriving the topology from
the number of NUMA nodes.
This change is required to spread threads on all cores on Windows 11 with
a 3990X CPU. It has only 1 NUMA node with 2 groups of 64 threads each.
closes https://github.com/official-stockfish/Stockfish/pull/3787
No functional change.
2021-11-15 18:19:53 +01:00
1a5c21dc56
Tune a few NNUE related scaling parameters
...
passed STC
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 102480 W: 26099 L: 25708 D: 50673
Ptnml(0-2): 282, 11637, 27003, 12044, 274
https://tests.stockfishchess.org/tests/view/618820e3d7a085ad008ef1dd
passed LTC
LLR: 2.93 (-2.94,2.94) <0.50,3.00>
Total: 165512 W: 41689 L: 41112 D: 82711
Ptnml(0-2): 82, 17255, 47510, 17822, 87
https://tests.stockfishchess.org/tests/view/6188b470d7a085ad008ef239
closes https://github.com/official-stockfish/Stockfish/pull/3784
Bench: 6339548
2021-11-11 00:56:57 +01:00
c4a1390f4e
Simplify away the Reverse Move penalty
...
This simplifies the penalty for reverse move introduced in
https://github.com/official-stockfish/Stockfish/pull/2294 .
STC:
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 81696 W: 20627 L: 20540 D: 40529
Ptnml(0-2): 221, 9390, 21559, 9437, 241
https://tests.stockfishchess.org/tests/view/618810acd7a085ad008ef1cc
LTC:
LLR: 2.95 (-2.94,2.94) <-2.25,0.25>
Total: 44136 W: 11021 L: 10890 D: 22225
Ptnml(0-2): 28, 4570, 12746, 4691, 33
https://tests.stockfishchess.org/tests/view/61885686d7a085ad008ef20b
closes https://github.com/official-stockfish/Stockfish/pull/3781
bench: 6547978
2021-11-08 13:14:18 +01:00
7b278aab9f
Reduce use of lazyEval
...
In case the evaluation at root is large, discourage the use of lazyEval.
This fixes https://github.com/official-stockfish/Stockfish/issues/3772
or at least improves it significantly. In this case, poor play with large
odds can be observed, in extreme cases leading to a loss despite large
advantage:
r1bq1b1r/ppp3p1/3p1nkp/n3p3/2B1P2N/2NPB3/PPP2PPP/R3K2R b KQ - 5 9
With this patch the poor move is only considered up to depth 13, in master
up to depth 28.
The patch did not pass at LTC with Elo gainer bounds, but with slightly
positive Elo nevertheless (95% LOS).
STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 40368 W: 10318 L: 10041 D: 20009
Ptnml(0-2): 103, 4493, 10725, 4750, 113
https://tests.stockfishchess.org/tests/view/61800ad259e71df00dcc420d
LTC:
LLR: -2.94 (-2.94,2.94) <0.50,3.00>
Total: 212288 W: 52997 L: 52692 D: 106599
Ptnml(0-2): 112, 22038, 61549, 22323, 122
https://tests.stockfishchess.org/tests/view/618050d959e71df00dcc426d
closes https://github.com/official-stockfish/Stockfish/pull/3780
Bench: 7127040
2021-11-08 13:03:52 +01:00
a0259d8ab9
Tweak initial aspiration window.
...
Maintain for each root move an exponential average of the search value with a weight ratio of 2:1 (new value vs old values). Then the average score is used as the center of the initial aspiration window instead of the previous score.
Stats indicate (see PR) that the deviation for previous score is in general greater than using average score, so later seems a better estimation of the next search value. This is probably the reason this patch succeded besides smoothing the sometimes wild swings in search score. An additional observation is that at higher depth previous score is above but average score below zero. So for average score more/less fail/low highs should be occur than previous score.
STC:
LLR: 2.97 (-2.94,2.94) <0.00,2.50>
Total: 59792 W: 15106 L: 14792 D: 29894
Ptnml(0-2): 144, 6718, 15869, 7010, 155
https://tests.stockfishchess.org/tests/view/61841612d7a085ad008eef06
LTC:
LLR: 2.94 (-2.94,2.94) <0.50,3.00>
Total: 46448 W: 11835 L: 11537 D: 23076
Ptnml(0-2): 21, 4756, 13374, 5050, 23
https://tests.stockfishchess.org/tests/view/618463abd7a085ad008eef3e
closes https://github.com/official-stockfish/Stockfish/pull/3776
Bench: 6719976
2021-11-05 22:22:30 +01:00
45e5e65a28
do not store qsearch positions in TT as exact.
...
in qsearch don't store positions in TT with the exact flag.
passed STC:
https://tests.stockfishchess.org/tests/view/617f9a29af49befdeee40231
LLR: 2.95 (-2.94,2.94) <-2.25,0.25>
Total: 155568 W: 39003 L: 39022 D: 77543
Ptnml(0-2): 403, 17854, 41305, 17803, 419
passed LTC:
https://tests.stockfishchess.org/tests/view/6180d47259e71df00dcc42a5
LLR: 2.94 (-2.94,2.94) <-2.25,0.25>
Total: 79640 W: 19993 L: 19910 D: 39737
Ptnml(0-2): 37, 8356, 22957, 8427, 43
closes https://github.com/official-stockfish/Stockfish/pull/3775
Bench: 7531210
2021-11-05 22:20:37 +01:00
c2b9134c6e
Do more reductions at Pv nodes with low delta
...
This patch increases reduction for PvNodes that have their delta (difference between beta and alpha) significantly reduced compared to what it was at root.
passed STC
https://tests.stockfishchess.org/tests/view/617f9063af49befdeee40226
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 220840 W: 55752 L: 55150 D: 109938
Ptnml(0-2): 583, 24982, 58712, 25536, 607
passed LTC
https://tests.stockfishchess.org/tests/view/61815de959e71df00dcc42ed
LLR: 2.95 (-2.94,2.94) <0.50,3.00>
Total: 79000 W: 19937 L: 19562 D: 39501
Ptnml(0-2): 36, 8190, 22674, 8563, 37
closes https://github.com/official-stockfish/Stockfish/pull/3774
bench: 6717808
2021-11-05 22:18:59 +01:00
11c6cf720d
More futility pruning
...
Expand maximum allowed eval by 50% in futility pruning, above the VALUE_KNOWN_WIN.
STC:
LLR: 2.95 (-2.94,2.94) <-0.50,2.50>
Total: 128208 W: 32534 L: 32192 D: 63482
Ptnml(0-2): 298, 13484, 36216, 13790, 316
https://tests.stockfishchess.org/tests/view/6179c069a9b1d8fbcc4ee716
LTC:
LLR: 2.96 (-2.94,2.94) <0.50,3.50>
Total: 89816 W: 22645 L: 22265 D: 44906
Ptnml(0-2): 41, 8404, 27650, 8760, 53
https://tests.stockfishchess.org/tests/view/617ad728f411ea45cc39f895
closes https://github.com/official-stockfish/Stockfish/pull/3767
bench: 6804175
2021-11-05 22:15:53 +01:00
5a223afe4c
Restore development version
...
No functional change
2021-11-01 06:28:37 +01:00
ef4822aa8d
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.
2021-10-31 22:43:38 +01:00
0e89d6e754
Do not output to stderr during the build.
...
To help with debugging, the worker sends the output of
stderr (suitable truncated) to the action log on the
server, in case a build fails. For this to work it is
important that there is no spurious output to stderr.
closes https://github.com/official-stockfish/Stockfish/pull/3773
No functional change
2021-10-31 22:40:41 +01:00
a8330d5c3b
Do more deeper LMR searches.
...
At expected cut nodes allow at least one ply deeper LMR search for the first seventh moves.
STC:
LLR: 2.93 (-2.94,2.94) <-0.50,2.50>
Total: 42880 W: 10964 L: 10738 D: 21178
Ptnml(0-2): 105, 4565, 11883, 4773, 114
https://tests.stockfishchess.org/tests/view/6179abd7a9b1d8fbcc4ee6f4
LTC:
LLR: 2.93 (-2.94,2.94) <0.50,3.50>
Total: 66872 W: 16930 L: 16603 D: 33339
Ptnml(0-2): 36, 6509, 20024, 6826, 41
https://tests.stockfishchess.org/tests/view/617a30fb2fbca9ca65972b5e
closes https://github.com/official-stockfish/Stockfish/pull/3770
Bench: 6295536
2021-10-31 22:31:55 +01:00
717d6c5ed5
Widen the aspiration window for larger evals
...
passed STC
LLR: 2.93 (-2.94,2.94) <-0.50,2.50>
Total: 36840 W: 9359 L: 9134 D: 18347
Ptnml(0-2): 111, 4130, 9722, 4337, 120
https://tests.stockfishchess.org/tests/view/617c601301c6d0988731d10a
passed LTC
LLR: 2.98 (-2.94,2.94) <0.50,3.50>
Total: 64824 W: 16377 L: 16043 D: 32404
Ptnml(0-2): 27, 6712, 18618, 7010, 45
https://tests.stockfishchess.org/tests/view/617c720d01c6d0988731d114
closes https://github.com/official-stockfish/Stockfish/pull/3768
Bench: 7683058
2021-10-31 22:30:01 +01:00
7262fd5d14
Stockfish 14.1
...
Official release version of Stockfish 14.1
Bench: 6334068
---
Today, we have the pleasure to announce Stockfish 14.1.
As usual, downloads will be freely available at stockfishchess.org/download [1].
With Stockfish 14.1 our users get access to the strongest chess engine
available today. In the period leading up to this release, Stockfish
convincingly won several chess engine tournaments, including the TCEC 21
superfinal, the TCEC Cup 9, and the Computer Chess Championship for
Fischer Random Chess (Chess960). In the latter tournament, Stockfish
was undefeated in 599 out of 600 games played.
Compared to Stockfish 14, this release introduces a more advanced NNUE
architecture and various search improvements. In self play testing, using
a book of balanced openings, Stockfish 14.1 wins three times more game
pairs than it loses [2]. At this high level, draws are very common, so the
Elo difference to Stockfish 14 is about 17 Elo. The NNUE evaluation method,
introduced to top level chess with Stockfish 12 about one year ago [3],
has now been adopted by several other strong CPU based chess engines.
The Stockfish project builds on a thriving community of enthusiasts
(thanks everybody!) that contribute their expertise, time, and resources
to build a free and open-source chess engine that is robust,
widely available, and very strong. We invite our chess fans to join the
fishtest testing framework and programmers to contribute to the project [4].
Stay safe and enjoy chess!
The Stockfish team
[1] https://stockfishchess.org/download/
[2] https://tests.stockfishchess.org/tests/view/6175c320af70c2be1788fa2b
[3] https://github.com/official-stockfish/Stockfish/discussions/3628
[4] https://stockfishchess.org/get-involved/
2021-10-28 07:38:19 +02:00
385deefd80
Fix sometimes incorrect key for prefetches
...
STC
https://tests.stockfishchess.org/tests/view/61737b4f6ce927be32558401
LLR: 2.95 (-2.94,2.94) <-2.50,0.50>
Total: 138712 W: 34914 L: 34942 D: 68856
Ptnml(0-2): 421, 14817, 38894, 14817, 407
Very minor tweak since Position::key() depends on the 50 move rule counter.
Comments: cddde31eedhttps://github.com/official-stockfish/Stockfish/pull/3759
No functional change
2021-10-25 12:26:44 +02:00
2c86ae196d
Adjust ButterflyHistory decay parameter
...
passed STC:
LLR: 2.98 (-2.94,2.94) <-0.50,2.50>
Total: 26680 W: 6807 L: 6593 D: 13280
Ptnml(0-2): 73, 3007, 6989, 3175, 96
https://tests.stockfishchess.org/tests/view/6174094e6ce927be32558441
passed LTC:
LLR: 2.98 (-2.94,2.94) <0.50,3.50>
Total: 21104 W: 5403 L: 5185 D: 10516
Ptnml(0-2): 8, 2160, 6001, 2372, 11
https://tests.stockfishchess.org/tests/view/61744927351812fe5f969864
closes https://github.com/official-stockfish/Stockfish/pull/3761
Bench: 6334068
2021-10-24 22:17:55 +02:00
8557f35aa5
Double extend search even more via LMR
...
Allow now for the first five moves a two plies deeper LMR search.
STC:
LLR: 2.96 (-2.94,2.94) <-2.50,0.50>
Total: 99608 W: 25143 L: 25115 D: 49350
Ptnml(0-2): 291, 11444, 26328, 11428, 313
https://tests.stockfishchess.org/tests/view/61718c9438cb9784038af8d7
LTC:
LLR: 2.95 (-2.94,2.94) <-2.50,0.50>
Total: 52064 W: 13234 L: 13145 D: 25685
Ptnml(0-2): 35, 5431, 15014, 5514, 38
https://tests.stockfishchess.org/tests/view/6171e13e38cb9784038af928
closes https://github.com/official-stockfish/Stockfish/pull/3760
Bench: 7222293
2021-10-24 22:13:47 +02:00
1163d972a9
Simplify LMR multiThread condition
...
STC (8 threads):
LLR: 2.95 (-2.94,2.94) <-2.50,0.50>
Total: 110584 W: 27818 L: 27807 D: 54959
Ptnml(0-2): 156, 12089, 30791, 12100, 156
https://tests.stockfishchess.org/tests/view/6172ef436ce927be325583a9
LTC (8 threads):
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 23632 W: 6025 L: 5903 D: 11704
Ptnml(0-2): 5, 2292, 7100, 2414, 5
https://tests.stockfishchess.org/tests/view/6173cf096ce927be32558412
closes https://github.com/official-stockfish/Stockfish/pull/3757
No functional change (in the single-threaded case)
Bench: 6689428
2021-10-24 22:08:28 +02:00
fc8213c7df
Tuning of a Null Move Parameter
...
STC:
LLR: 2.99 (-2.94,2.94) <-0.50,2.50>
Total: 78744 W: 19956 L: 19664 D: 39124
Ptnml(0-2): 259, 9005, 20573, 9255, 280
https://tests.stockfishchess.org/tests/view/6172017a38cb9784038af947
LTC:
LLR: 2.95 (-2.94,2.94) <0.50,3.50>
Total: 68528 W: 17309 L: 16964 D: 34255
Ptnml(0-2): 41, 7194, 19455, 7527, 47
https://tests.stockfishchess.org/tests/view/6172994d38cb9784038af983
closes https://github.com/official-stockfish/Stockfish/pull/3756
bench: 6689428
2021-10-23 12:27:32 +02:00
927a84d310
Increase TTdepth acceptance some Threads
...
Increase TTdepth acceptance only on half of the Threads
STC:
LLR: 2.96 (-2.94,2.94) <-0.50,2.50>
Total: 19272 W: 4956 L: 4766 D: 9550
Ptnml(0-2): 25, 1989, 5423, 2169, 30
https://tests.stockfishchess.org/tests/view/6172be6238cb9784038af9a7
LTC:
LLR: 2.93 (-2.94,2.94) <0.50,3.50>
Total: 23688 W: 6111 L: 5897 D: 11680
Ptnml(0-2): 2, 2275, 7081, 2479, 7
https://tests.stockfishchess.org/tests/view/6172e32938cb9784038af9c7
closes https://github.com/official-stockfish/Stockfish/pull/3754
No functional change in the single-threaded case
2021-10-23 12:23:29 +02:00
2214fcecf7
Rewrite NNUE evaluation adjustments
...
Make the eval code in the evaluate_nnue.cpp more similar to the rest of the codebase:
* remove multiple variable assignment
* make if conditions explicit and indent on multiple lines
passed STC
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 59032 W: 14834 L: 14751 D: 29447
Ptnml(0-2): 176, 6310, 16459, 6397, 174
https://tests.stockfishchess.org/tests/view/616f250540f619782fd4f76d
closes https://github.com/official-stockfish/Stockfish/pull/3753
No functional change
2021-10-23 12:22:02 +02:00
644f6d4790
Simplify away ValueListInserter
...
plus minor cleanups
STC: https://tests.stockfishchess.org/tests/view/616f059b40f619782fd4f73f
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 84992 W: 21244 L: 21197 D: 42551
Ptnml(0-2): 279, 9005, 23868, 9078, 266
closes https://github.com/official-stockfish/Stockfish/pull/3749
No functional change
2021-10-23 12:21:17 +02:00
8a8640a761
Double extend more often via LMR
...
Allow for first three moves always a two plies deeper LMR search.
STC:
LLR: 2.96 (-2.94,2.94) <-2.50,0.50>
Total: 206096 W: 51966 L: 52093 D: 102037
Ptnml(0-2): 664, 23817, 54293, 23530, 744
https://tests.stockfishchess.org/tests/view/616f197d40f619782fd4f75a
LTC:
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 62384 W: 15567 L: 15492 D: 31325
Ptnml(0-2): 40, 6633, 17777, 6696, 46
https://tests.stockfishchess.org/tests/view/616ffa1b4f0b65a0e231e682
closes https://github.com/official-stockfish/Stockfish/pull/3752
Bench: 6154836
2021-10-21 12:42:30 +02:00
42a895d9c9
Simplify null move search condition
...
Remove `ss->ttPv` condition on null move search condition
STC:
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 80832 W: 20276 L: 20221 D: 40335
Ptnml(0-2): 267, 9335, 21168, 9368, 278
https://tests.stockfishchess.org/tests/view/616ed4a0942d40685e3237c6
LTC:
LLR: 2.95 (-2.94,2.94) <-2.50,0.50>
Total: 54184 W: 13464 L: 13377 D: 27343
Ptnml(0-2): 37, 5758, 15435, 5805, 57
https://tests.stockfishchess.org/tests/view/616ef71f40f619782fd4f72d
closes https://github.com/official-stockfish/Stockfish/pull/3750
bench: 6201607
2021-10-21 08:43:43 +02:00
4af1ae82c6
Adjust TTdepth acceptance on early cutoff
...
STC:
LLR: 2.94 (-2.94,2.94) <-0.50,2.50>
Total: 63784 W: 16185 L: 15917 D: 31682
Ptnml(0-2): 231, 7309, 16531, 7603, 218
https://tests.stockfishchess.org/tests/view/616ed03a942d40685e3237c0
LTC:
LLR: 2.93 (-2.94,2.94) <0.50,3.50>
Total: 12728 W: 3268 L: 3072 D: 6388
Ptnml(0-2): 8, 1298, 3563, 1480, 15
https://tests.stockfishchess.org/tests/view/616ef156942d40685e32380a
closes https://github.com/official-stockfish/Stockfish/pull/3748
bench: 7050445
2021-10-19 22:14:39 +02:00
b37054c310
Simplify evaluate condition on search
...
Remove condition for MOVE_NULL on search.
STC:
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 47544 W: 11968 L: 11864 D: 23712
Ptnml(0-2): 150, 5535, 12318, 5599, 170
https://tests.stockfishchess.org/tests/view/616e37143799eb91f1f071ee
LTC:
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 67472 W: 16938 L: 16870 D: 33664
Ptnml(0-2): 49, 7119, 19331, 7189, 48
https://tests.stockfishchess.org/tests/view/616e3fab3799eb91f1f071f1
closes https://github.com/official-stockfish/Stockfish/pull/3746
bench: 5255771
2021-10-19 22:09:47 +02:00
67d0616483
Simplify probCutCount away
...
Simplify away the limitation in number of moves in probCut.
STC:
LLR: 2.96 (-2.94,2.94) <-2.50,0.50>
Total: 286768 W: 71888 L: 72133 D: 142747
Ptnml(0-2): 983, 33084, 75471, 32887, 959
https://tests.stockfishchess.org/tests/view/616c9b9b90e1312a3cd0ef0a
LTC:
LLR: 2.95 (-2.94,2.94) <-2.50,0.50>
Total: 69312 W: 17243 L: 17176 D: 34893
Ptnml(0-2): 42, 7452, 19614, 7493, 55
https://tests.stockfishchess.org/tests/view/616cebbf4f95b438f7a85f93
closes https://github.com/official-stockfish/Stockfish/pull/3745
bench: 5005810
2021-10-18 21:00:08 +02:00
f7494961de
Reformat Eval::evaluate()
...
Non functional simplification: the goal of this patch is to make
the style in the evaluate() function similar to the rest of the code.
passed STC:
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 95608 W: 24058 L: 24026 D: 47524
Ptnml(0-2): 292, 10379, 26396, 10479, 258
https://tests.stockfishchess.org/tests/view/616c64fd99b580bf37797e4f
closes https://github.com/official-stockfish/Stockfish/pull/3744
Non-functional change
2021-10-18 20:45:47 +02:00
8a74c08928
Remove noLMRExtension flag
...
This simplification patch removes the noLMRExtension flag. It was introduced in June
(see following link for that commit), but does not seem to be necessary anymore.
Link: e1f181ee64https://tests.stockfishchess.org/tests/view/616c03d299b580bf37797dcb
LTC:
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 37536 W: 9387 L: 9278 D: 18871
Ptnml(0-2): 23, 3988, 10643, 4085, 29
https://tests.stockfishchess.org/tests/view/616c10f499b580bf37797ddd
closes https://github.com/official-stockfish/Stockfish/pull/3743
Bench: 4792969
2021-10-17 17:54:39 +02:00
6847be2c75
Allow some LMR double extensions
...
Allow some LMR double extensions for the second and third sons of each node.
STC:
LLR: 2.94 (-2.94,2.94) <-0.50,2.50>
Total: 170320 W: 42608 L: 42187 D: 85525
Ptnml(0-2): 516, 19635, 44422, 20086, 501
https://tests.stockfishchess.org/tests/view/616a9e3899b580bf37797cf4
LTC:
LLR: 2.93 (-2.94,2.94) <0.50,3.50>
Total: 74400 W: 18783 L: 18423 D: 37194
Ptnml(0-2): 46, 7812, 21129, 8162, 51
https://tests.stockfishchess.org/tests/view/616b378499b580bf37797d61
closes https://github.com/official-stockfish/Stockfish/pull/3742
Bench: 4877152
2021-10-17 12:29:11 +02:00
4231d99ab4
Smooth improving
...
Smooth dependency on improvement margin in null move search.
STC
LLR: 2.93 (-2.94,2.94) <-0.50,2.50>
Total: 17384 W: 4468 L: 4272 D: 8644
Ptnml(0-2): 42, 1919, 4592, 2079, 60
https://tests.stockfishchess.org/tests/view/61689b8a1e5f6627cc1c0fdc
LTC
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 45648 W: 11525 L: 11243 D: 22880
Ptnml(0-2): 26, 4731, 13036, 4997, 34
https://tests.stockfishchess.org/tests/view/6168a12c1e5f6627cc1c0fe3
It would be interesting to test if the other pruning/reduction heuristics
in master which are using the improving variable (ie the sign of improvement)
could benefit from a smooth function of the improvement value (or maybe a
Relu of the improvement value).
closes https://github.com/official-stockfish/Stockfish/pull/3740
Bench: 4916775
2021-10-15 14:57:01 +02:00
580698e5e5
Compute ttCapture earlier
...
Compute ttCapture earlier, and reuse.
passed STC:
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 74128 W: 18640 L: 18578 D: 36910
Ptnml(0-2): 224, 7970, 20649, 7962, 259
https://tests.stockfishchess.org/tests/view/615dd9fa1a32f4036ac7fc4d
closes https://github.com/official-stockfish/Stockfish/pull/3734
No functional change
2021-10-14 09:58:03 +02:00
0bddd942b4
Simplify ttHitAverage away
...
Simplify ttHitAverage away, which was introduced in the following commit:
[here](fe124896b2https://tests.stockfishchess.org/tests/view/61656f7683dd501a05b0b292
https://tests.stockfishchess.org/tests/view/6165c0ca83dd501a05b0b2ca
https://tests.stockfishchess.org/tests/view/6165bf9683dd501a05b0b2c8
https://tests.stockfishchess.org/tests/view/6165719483dd501a05b0b29b
https://tests.stockfishchess.org/tests/view/6166c7fd83dd501a05b0b353
https://tests.stockfishchess.org/tests/view/6166c63b83dd501a05b0b350
STC:
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 58504 W: 14781 L: 14694 D: 29029
Ptnml(0-2): 175, 6718, 15426, 6711, 222
https://tests.stockfishchess.org/tests/view/6165112c83dd501a05b0b257
LTC:
LLR: 2.96 (-2.94,2.94) <-2.50,0.50>
Total: 33480 W: 8448 L: 8332 D: 16700
Ptnml(0-2): 21, 3569, 9447, 3679, 24
https://tests.stockfishchess.org/tests/view/61656fcf83dd501a05b0b294
change https://github.com/official-stockfish/Stockfish/pull/3739
bench: 4540339
2021-10-14 09:47:20 +02:00
673841301b
Simplify multi-cut condition
...
Now that the multi-cut condition is safer, we can avoid the cost of the sub-search.
STC:
https://tests.stockfishchess.org/tests/view/6165fd9283dd501a05b0b2fe
LLR: 2.93 (-2.94,2.94) <-2.50,0.50>
Total: 18648 W: 4745 L: 4600 D: 9303
Ptnml(0-2): 47, 2111, 4887, 2208, 71
LTC:
https://tests.stockfishchess.org/tests/view/616629ea83dd501a05b0b320
LLR: 2.96 (-2.94,2.94) <-2.50,0.50>
Total: 41704 W: 10407 L: 10302 D: 20995
Ptnml(0-2): 35, 4425, 11823, 4538, 31
closes https://github.com/official-stockfish/Stockfish/pull/3738
Bench: 5905086
2021-10-13 23:34:23 +02:00
c8459b18ba
Reduce more if multiple moves exceed alpha
...
Idea of this patch is the following: in case we already have four moves that
exceeded alpha in the current node, the probability of finding fifth should
be reasonably low. Note that four is completely arbitrary - there could and
probably should be some tweaks, both in tweaking best move count threshold
for more reductions and tweaking how they work - for example making more
reductions with best move count linearly.
passed STC:
https://tests.stockfishchess.org/tests/view/615f614783dd501a05b0aee2
LLR: 2.94 (-2.94,2.94) <-0.50,2.50>
Total: 141816 W: 36056 L: 35686 D: 70074
Ptnml(0-2): 499, 15131, 39273, 15511, 494
passed LTC:
https://tests.stockfishchess.org/tests/view/615fdff683dd501a05b0af35
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 68536 W: 17221 L: 16891 D: 34424
Ptnml(0-2): 38, 6573, 20725, 6885, 47
closes https://github.com/official-stockfish/Stockfish/pull/3736
Bench: 6131513
2021-10-09 09:59:33 +02:00
server