[pos.piece_on(to_sq(move))][to_sq(move)] <= VALUE_ZERO))
ss->reduction += ONE_PLY;
- if ( move == countermove
- || ( History[pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO
+ if ( History[pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO
&& CounterMovesHistory[pos.piece_on(prevMoveSq)][prevMoveSq]
- [pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO))
+ [pos.piece_on(to_sq(move))][to_sq(move)] > VALUE_ZERO)
ss->reduction = std::max(DEPTH_ZERO, ss->reduction - ONE_PLY);
// Decrease reduction for moves that escape a capture