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Remove history bonus from Eval

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STC:
LLR: 2.92 (-2.94,2.94) {-1.50,0.50}
Total: 26776 W: 2787 L: 2725 D: 21264
https://tests.stockfishchess.org/tests/view/5f39d6beb38d442594aabd9b

LTC:
LLR: 2.93 (-2.94,2.94) {-1.50,0.50}
Total: 12968 W: 635 L: 608 D: 11725
https://tests.stockfishchess.org/tests/view/5f39decfb38d442594aabda7

closes https://github.com/official-stockfish/Stockfish/pull/3019

Bench:  4335100
This commit is contained in:
VoyagerOne
2020-08-17 08:58:03 -04:00
committed by Joost VandeVondele
parent 65b976439f
commit 1c0b7bdf4f
1 changed files with 1 additions and 5 deletions
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src/search.cpp
+1 -5
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@@ -794,11 +794,7 @@ namespace {
else else
{ {
if ((ss-1)->currentMove != MOVE_NULL) if ((ss-1)->currentMove != MOVE_NULL)
{ ss->staticEval = eval = evaluate(pos);
int bonus = -(ss-1)->statScore / 512;
ss->staticEval = eval = evaluate(pos) + bonus;
}
else else
ss->staticEval = eval = -(ss-1)->staticEval + 2 * Tempo; ss->staticEval = eval = -(ss-1)->staticEval + 2 * Tempo;