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Remove passed pawn condition.

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This will help scale down relatively high eval in drawish rook endgames with passed pawn like in TCEC S18 Superfinal Game 90.

Passed STC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 50456 W: 9644 L: 9540 D: 31272
Ptnml(0-2): 760, 5637, 12332, 5737, 762
https://tests.stockfishchess.org/tests/view/5efcb76e59f6f035328940ed

Passed LTC
LLR: 2.94 (-2.94,2.94) {-1.50,0.50}
Total: 77264 W: 9518 L: 9518 D: 58228
Ptnml(0-2): 402, 6766, 24321, 6716, 427
https://tests.stockfishchess.org/tests/view/5efd2ad759f6f03532894143

closes https://github.com/official-stockfish/Stockfish/pull/2792

Bench: 4431626
This commit is contained in:
SFisGOD 2020-07-02 00:11:23 +08:00 • committed by Joost VandeVondele
parent fb83da0892
commit 67818ee948
1 changed files with 0 additions and 1 deletions
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src/evaluate.cpp
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@ -777,7 +777,6 @@ namespace {
} }
else if ( pos.non_pawn_material(WHITE) == RookValueMg else if ( pos.non_pawn_material(WHITE) == RookValueMg
&& pos.non_pawn_material(BLACK) == RookValueMg && pos.non_pawn_material(BLACK) == RookValueMg
&& !pe->passed_pawns(strongSide)
&& pos.count<PAWN>(strongSide) - pos.count<PAWN>(~strongSide) <= 1 && pos.count<PAWN>(strongSide) - pos.count<PAWN>(~strongSide) <= 1
&& bool(KingSide & pos.pieces(strongSide, PAWN)) != bool(QueenSide & pos.pieces(strongSide, PAWN)) && bool(KingSide & pos.pieces(strongSide, PAWN)) != bool(QueenSide & pos.pieces(strongSide, PAWN))
&& (attacks_bb<KING>(pos.square<KING>(~strongSide)) & pos.pieces(~strongSide, PAWN))) && (attacks_bb<KING>(pos.square<KING>(~strongSide)) & pos.pieces(~strongSide, PAWN)))