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update move generation for pinned pieces

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This commit is contained in:
Paul-Nicolas Madelaine 2025-10-22 22:59:53 +02:00
parent c71bbc216f
commit 752150107e
1 changed files with 19 additions and 18 deletions
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37
src/position.rs
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@ -1054,10 +1054,13 @@ impl Position {
} }
let blockers_x_ray = blockers & !(x | y); let blockers_x_ray = blockers & !(x | y);
let pinned = (d.bishop(king_square, blockers_x_ray) & theirs.bishop() let pinned_diagonally = (d.bishop(king_square, blockers_x_ray) & theirs.bishop())
| d.rook(king_square, blockers_x_ray) & theirs.rook()) .map(|sq| d.segment(king_square, sq))
.map(|sq| d.segment(king_square, sq)) .reduce_or();
.reduce_or(); let pinned_horizontally = (d.rook(king_square, blockers_x_ray) & theirs.rook())
.map(|sq| d.segment(king_square, sq))
.reduce_or();
let pinned = pinned_diagonally | pinned_horizontally;
let checker = checkers.first(); let checker = checkers.first();
let block_check = checker let block_check = checker
@ -1223,30 +1226,28 @@ impl Position {
// pinned pieces // pinned pieces
{ {
let aux = |visitor: &mut T, role| { let aux = |visitor: &mut T, role, mask| {
for from in global_mask_from & *ours.get(role) & pinned { for from in global_mask_from & *ours.get(role) & mask {
visitor.moves( visitor.moves(
(global_mask_to (global_mask_to & !us & pinned & d.line(king_square, from)).map(|to| {
& d.targets(role, from, blockers) RawMove {
& !us kind: MoveType::PieceMove,
& d.line(king_square, from)) from,
.map(|to| RawMove { to,
kind: MoveType::PieceMove, role,
from, }
to,
role,
}), }),
) )
} }
}; };
if visitor.roles(Role::Bishop) { if visitor.roles(Role::Bishop) {
aux(visitor, Role::Bishop) aux(visitor, Role::Bishop, pinned_diagonally);
} }
if visitor.roles(Role::Rook) { if visitor.roles(Role::Rook) {
aux(visitor, Role::Rook) aux(visitor, Role::Rook, pinned_horizontally);
} }
if visitor.roles(Role::Queen) { if visitor.roles(Role::Queen) {
aux(visitor, Role::Queen) aux(visitor, Role::Queen, pinned);
} }
} }
} }