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Don't account for Tempo in specialized endgames

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The evaluation is already done by the specialized
function, don't need to add something elese later.

With this patch following positions are evaluated
correctly as draws:

8/6p1/1Pkp1p1p/2nNn2P/2P1K1P1/8/8/3B4 w - - 7
8/1k4p1/1P1p1p1p/3NnK1P/2P3P1/1n6/4B3/8 w - -

Verified it not regress with an STC test:
LLR: 3.15 (-2.94,2.94) [-3.00,1.00]
Total: 49812 W: 10095 L: 10016 D: 29701

Reported by Arjun Temurnikar.

bench: 8289983
This commit is contained in:
Marco Costalba
2014-12-16 08:25:54 +01:00
parent 46d5fff01f
commit 9cae6e66ce
1 changed files with 1 additions and 1 deletions
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2
src/evaluate.cpp
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@@ -702,7 +702,7 @@ namespace {
// If we have a specialized evaluation function for the current material // If we have a specialized evaluation function for the current material
// configuration, call it and return. // configuration, call it and return.
if (ei.mi->specialized_eval_exists()) if (ei.mi->specialized_eval_exists())
return ei.mi->evaluate(pos) + Eval::Tempo; return ei.mi->evaluate(pos);
// Probe the pawn hash table // Probe the pawn hash table
ei.pi = Pawns::probe(pos, thisThread->pawnsTable); ei.pi = Pawns::probe(pos, thisThread->pawnsTable);