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Remove one division. (#2158) 

Can be included in the earlier calculation, with a small rounding difference.

passed STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 17912 W: 4044 L: 3915 D: 9953
http://tests.stockfishchess.org/tests/view/5ce711f90ebc5925cf070d0e

passed LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 56061 W: 9579 L: 9516 D: 36966
http://tests.stockfishchess.org/tests/view/5ce716820ebc5925cf070e37

Bench: 3817662
pull/2160/head
Joost VandeVondele 2019-05-25 09:43:52 +02:00 committed by Marco Costalba
parent bf6b647a1a
commit 190f38a7c2
1 changed files with 2 additions and 2 deletions
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4
src/search.cpp
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@ -71,7 +71,7 @@ namespace {
int Reductions[MAX_MOVES]; // [depth or moveNumber]
Depth reduction(bool i, Depth d, int mn) {
int r = Reductions[d / ONE_PLY] * Reductions[mn] / 1024;
int r = Reductions[d / ONE_PLY] * Reductions[mn];
return ((r + 512) / 1024 + (!i && r > 1024)) * ONE_PLY;
}
@ -149,7 +149,7 @@ namespace {
void Search::init() {
for (int i = 1; i < MAX_MOVES; ++i)
Reductions[i] = int(733.3 * std::log(i));
Reductions[i] = int(22.9 * std::log(i));
}