if ( !PruneBlockingMoves
&& threat != MOVE_NONE
&& piece_is_slider(pos.piece_on(tfrom))
- && bit_is_set(squares_between(tfrom, tto), mto) && pos.see(m) >= 0)
+ && bit_is_set(squares_between(tfrom, tto), mto)
+ && pos.see(m) >= 0)
return false;
return true;