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Change advanced pawn push threshold

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A pawn push is now considered to be "advanced" if the relative destination
rank is > 6 (previously it was > 5). This affects the search heuristic.

Also remove an assert concerning en passant moves in qsearch().

STC:
LLR: 2.97 (-2.94,2.94) {-0.25,1.25}
Total: 46744 W: 4224 L: 4040 D: 38480
Ptnml(0-2): 165, 3206, 16451, 3380, 170
https://tests.stockfishchess.org/tests/view/604746082433018de7a3872e

LTC:
LLR: 2.94 (-2.94,2.94) {0.25,1.25}
Total: 107840 W: 4198 L: 3892 D: 99750
Ptnml(0-2): 58, 3472, 46557, 3772, 61
https://tests.stockfishchess.org/tests/view/60475eae2433018de7a38737

Closes https://github.com/official-stockfish/Stockfish/pull/3389

Bench: 4796780
This commit is contained in:
Topologist
2021-03-08 19:46:41 +01:00
committed by Stéphane Nicolet
parent b74274628c
commit f3b296c2e2
3 changed files with 3 additions and 4 deletions
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2
src/position.h
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@@ -312,7 +312,7 @@ inline bool Position::pawn_passed(Color c, Square s) const {
inline bool Position::advanced_pawn_push(Move m) const {
return type_of(moved_piece(m)) == PAWN
&& relative_rank(sideToMove, to_sq(m)) > RANK_5;
&& relative_rank(sideToMove, to_sq(m)) > RANK_6;
}
inline int Position::pawns_on_same_color_squares(Color c, Square s) const {