diff --git a/src/search.cpp b/src/search.cpp index 6ec4d803..91ac60ad 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -1167,6 +1167,13 @@ moves_loop: // When in check, search starts from here { Depth r = reduction(improving, depth, moveCount); + // Decrease reduction at non-check cut nodes for second move at low depths + if ( cutNode + && depth <= 10 + && moveCount <= 2 + && !ss->inCheck) + r--; + // Decrease reduction if the ttHit running average is large if (thisThread->ttHitAverage > 473 * TtHitAverageResolution * TtHitAverageWindow / 1024) r--;