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simplify pos_set_checkers_pinners_blockers() (cont'd)

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Bruno Raoult
2024-04-10 15:59:24 +02:00
parent 9b5c2253b1
commit 374116b1e7
2 changed files with 5 additions and 6 deletions
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9
src/position.c
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@@ -201,9 +201,8 @@ void pos_set_checkers_pinners_blockers(pos_t *pos)
bitboard_t occ = pos_occ(pos);
bitboard_t attackers;
bitboard_t checkers = 0, blockers = 0, pinners = 0;
bitboard_t targets, tmpcheckers, maybeblockers, tmppinners, tmpbb;
bitboard_t targets, tmpcheckers, maybeblockers, tmppinners;
square_t king = pos->king[us];
bitboard_t king_bb = mask(king);
int pinner;
/* bishop type - we attack with a bishop from king position */
@@ -216,7 +215,7 @@ void pos_set_checkers_pinners_blockers(pos_t *pos)
tmpcheckers = targets & attackers;
checkers |= tmpcheckers;
/* maybe blockers = not checkers */
/* maybe blockers = we remove checkers, to look "behind" */
maybeblockers = targets & ~tmpcheckers;
/* we find second targets, by removing first ones (excl. checkers) */
@@ -256,9 +255,7 @@ void pos_set_checkers_pinners_blockers(pos_t *pos)
checkers |= bb_pawn_attacks[us][king] & pos->bb[them][PAWN];
/* knight */
attackers = pos->bb[them][KNIGHT];
targets = bb_knight[king] & attackers;
checkers |= targets;
checkers |= bb_knight[king] & pos->bb[them][KNIGHT];
pos->checkers = checkers;
pos->pinners = pinners;

2
test/perft-test.c
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@@ -299,6 +299,8 @@ int main(int __unused ac, __unused char**av)
pos_del(savepos);
pos_del(pos);
i++;
/* to run first test only */
// exit(0);
}
if (run & 1)
printf("total perft %'ldms\n", ms1_total);