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Restrict mobility of pinned pieces

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Passed both short TC:
LLR: 3.00 (-2.94,2.94) [-1.50,4.50]
Total: 54342 W: 10950 L: 10692 D: 32700

And long TC:
LLR: 2.95 (-2.94,2.94) [0.00,6.00]
Total: 61976 W: 10654 L: 10251 D: 41071

This patch introduces a slowdown of 3.5 % !!!!!

bench: 7911558
This commit is contained in:
Gary Linscott
2013-11-07 13:59:11 -05:00
committed by Marco Costalba
parent ecd07e51d0
commit 13d1f0ae43
6 changed files with 19 additions and 12 deletions
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10
src/position.h
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@@ -108,7 +108,7 @@ public:
// Checking
Bitboard checkers() const;
Bitboard discovered_check_candidates() const;
Bitboard pinned_pieces() const;
Bitboard pinned_pieces(Color toMove) const;
// Attacks to/from a given square
Bitboard attackers_to(Square s) const;
@@ -175,7 +175,7 @@ private:
// Helper functions
void do_castle(Square kfrom, Square kto, Square rfrom, Square rto);
Bitboard hidden_checkers(Square ksq, Color c) const;
Bitboard hidden_checkers(Square ksq, Color c, Color toMove) const;
void put_piece(Square s, Color c, PieceType pt);
void remove_piece(Square s, Color c, PieceType pt);
void move_piece(Square from, Square to, Color c, PieceType pt);
@@ -316,11 +316,11 @@ inline Bitboard Position::checkers() const {
}
inline Bitboard Position::discovered_check_candidates() const {
return hidden_checkers(king_square(~sideToMove), sideToMove);
return hidden_checkers(king_square(~sideToMove), sideToMove, sideToMove);
}
inline Bitboard Position::pinned_pieces() const {
return hidden_checkers(king_square(sideToMove), ~sideToMove);
inline Bitboard Position::pinned_pieces(Color toMove) const {
return hidden_checkers(king_square(toMove), ~toMove, toMove);
}
inline bool Position::pawn_passed(Color c, Square s) const {