Remove reduction for moving threatened piece

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index ac74cdaf885e5574b0ccf8c2030934e4cad14f48..2fcbc7df2a524d1e33617814f45bbc75696c957b 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1005,7 +1005,6 @@ moves_loop: // When in check, search starts here
           {
               // Futility pruning for captures (~2 Elo)
               if (   !givesCheck
-                  && !PvNode
                   && lmrDepth < 6
                   && !ss->inCheck
                   && ss->staticEval + 182 + 230 * lmrDepth + PieceValue[EG][pos.piece_on(to_sq(move))]
@@ -1182,11 +1181,6 @@ moves_loop: // When in check, search starts here
       if (singularQuietLMR)
           r--;
 
-      // Decrease reduction if we move a threatened piece (~1 Elo)
-      if (   depth > 9
-          && (mp.threatenedPieces & from_sq(move)))
-          r--;
-
       // Increase reduction if next ply has a lot of fail high (~5 Elo)
       if ((ss+1)->cutoffCnt > 3)
           r++;