Simplify futility pruning parent node

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index f9910fb72087dae7f4c2750fd748978d09c7f61d..70520ac9ff74049b534cbf720abd857bd3ac3b40 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1024,10 +1024,9 @@ moves_loop: // When in check, search starts from here
               if (   lmrDepth < 6
                   && !inCheck
                   && ss->staticEval + 235 + 172 * lmrDepth <= alpha
               if (   lmrDepth < 6
                   && !inCheck
                   && ss->staticEval + 235 + 172 * lmrDepth <= alpha

-                  &&  thisThread->mainHistory[us][from_to(move)]
-                    + (*contHist[0])[movedPiece][to_sq(move)]
+                  &&  (*contHist[0])[movedPiece][to_sq(move)]

                     + (*contHist[1])[movedPiece][to_sq(move)]
                     + (*contHist[1])[movedPiece][to_sq(move)]

-                    + (*contHist[3])[movedPiece][to_sq(move)] < 25000)
+                    + (*contHist[3])[movedPiece][to_sq(move)] < 27400)

                   continue;
 
               // Prune moves with negative SEE (~20 Elo)
                   continue;
 
               // Prune moves with negative SEE (~20 Elo)