diff --git a/src/search.cpp b/src/search.cpp index cbc5038a..727990dc 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -959,7 +959,10 @@ moves_loop: // When in check and at SpNode search starts from here [pos.piece_on(to_sq(move))][to_sq(move)] <= VALUE_ZERO)) ss->reduction += ONE_PLY; - if (move == countermove) + if ( move == countermove + || ( 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)) ss->reduction = std::max(DEPTH_ZERO, ss->reduction - ONE_PLY); // Decrease reduction for moves that escape a capture