X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fsearch.cpp;h=807d261472fc091b96f7aaf71ec46c784a1f810a;hb=e4a0c6c75950bf27b6dc32490a1102499643126b;hp=92ec9eca77dae75a800adf0f719c753288a233a4;hpb=092b27a6d0174f619fff9a53099ac9fdc5c2cb4e;p=stockfish

diff --git a/src/search.cpp b/src/search.cpp
index 92ec9eca..807d2614 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1054,17 +1054,21 @@ moves_loop: // When in check, search starts here
           }
           else
           {
+              int history =   (*contHist[0])[movedPiece][to_sq(move)]
+                            + (*contHist[1])[movedPiece][to_sq(move)]
+                            + (*contHist[3])[movedPiece][to_sq(move)];
+
               // Continuation history based pruning (~20 Elo)
-              if (lmrDepth < 5
-                  && (*contHist[0])[movedPiece][to_sq(move)]
-                  + (*contHist[1])[movedPiece][to_sq(move)]
-                  + (*contHist[3])[movedPiece][to_sq(move)] < -3000 * depth + 3000)
+              if (   lmrDepth < 5
+                  && history < -3000 * depth + 3000)
                   continue;
 
+              history += thisThread->mainHistory[us][from_to(move)];                  
+
               // Futility pruning: parent node (~5 Elo)
               if (   !ss->inCheck
                   && lmrDepth < 8
-                  && ss->staticEval + 172 + 145 * lmrDepth <= alpha)
+                  && ss->staticEval + 142 + 139 * lmrDepth + history / 64 <= alpha)
                   continue;
 
               // Prune moves with negative SEE (~20 Elo)