Rule says should be reset only after a capture and/or
a pawn move.
This incredible bug was here since Glaurung times !
Spotted by Kiriakos.
No functional change in the test bench because we
don't reach the 50 moves limits.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
k ^= zobSideToMove;
// Increment the 50 moves rule draw counter. Resetting it to zero in the
- // case of non-reversible moves is taken care of later.
+ // case of a capture or a pawn move is taken care of later.
st->rule50++;
st->pliesFromNull++;
st->castleRights &= castleRightsMask[kfrom];
st->key ^= zobCastle[st->castleRights];
- // Reset rule 50 counter
- st->rule50 = 0;
-
// Update checkers BB
st->checkersBB = attackers_to(king_square(~us)) & pieces(us);