bruno/brchess
1
0
Fork 0
Code Issues 9 Projects Releases Wiki Activity

move: exclusive M_CAPTURE / M_EN_PASSANT

Browse Source
This commit is contained in:
Bruno Raoult
2024-03-20 09:58:42 +01:00
parent ae6328ce26
commit 3a06407d5a
3 changed files with 12 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/move-gen.c
View File

@@ -157,8 +157,8 @@ movelist_t *pos_all_legal(const pos_t *pos, movelist_t *dest)
* - castling, if king passes an enemy-controlled square (not final square).
* When immediately known, a few move flags are also applied in these cases:
* - castling: M_CASTLE_{K,Q}
* - pawn capture (incl. en-passant): M_CAPTURE
* en-passant: M_EN_PASSANT
* - pawn capture (excl. en-passant): M_CAPTURE
* - en-passant: M_EN_PASSANT
* - pawn double push: M_DPUSH
* - promotion: M_PROMOTION
* - promotion and capture
@@ -311,18 +311,18 @@ int pos_gen_pseudomoves(pos_t *pos)
bitboard_t rel_rank1 = bb_rel_rank(RANK_1, us);
from = pos->king[us];
square_t from_square[2] = { E1, E8 }; /* verify king is on E1/E8 */
bug_on(CAN_CASTLE(pos->castle, us) && from != from_square[us]);
bug_on(can_castle(pos->castle, us) && from != from_square[us]);
/* For castle, we check the opponent attacks on squares between from and to.
* To square attack check will be done in gen_is_legal.
*/
if (CAN_OO(pos->castle, us)) {
if (can_oo(pos->castle, us)) {
bitboard_t occmask = rel_rank1 & (FILE_Fbb | FILE_Gbb);
if (!(occ & occmask) &&
!sq_attackers(pos, occ, from+1, them)) { /* f1/f8 */
moves[nmoves++] = move_make_flags(from, from + 2, M_CASTLE_K);
}
}
if (CAN_OOO(pos->castle, us)) {
if (can_ooo(pos->castle, us)) {
bitboard_t occmask = rel_rank1 & (FILE_Bbb | FILE_Cbb | FILE_Dbb);
if (!(occ & occmask) &&
!sq_attackers(pos, occ, from-1, them)) { /* d1/d8 */