// Case 4: The destination square for m2 is attacked by the moving piece in m1
p = pos.piece_on(t1);
- if (bit_is_set(pos.piece_attacks(p, t1), t2))
+ if (bit_is_set(pos.attacks_from(p, t1), t2))
return true;
// Case 5: Discovered check, checking piece is the piece moved in m1