X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=4a993b017542cd84b6cd159f4a5f64e0feee9dd4;hp=886ed52ca0bbf65f3fca476d4bffe12a650f44d2;hb=23ecf3d5c6ffbcfbe45acd2afcf503929474a4db;hpb=dc5af66eadf3cbe3c3ef106657e561c1aa8ac97f

diff --git a/src/search.cpp b/src/search.cpp
index 886ed52c..4a993b01 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1028,7 +1028,7 @@ moves_loop: // When in check, search starts from here
                   continue;
 
               // Futility pruning: parent node (~5 Elo)
-              if (   lmrDepth < 6
+              if (   lmrDepth < 8
                   && !ss->inCheck
                   && ss->staticEval + 284 + 188 * lmrDepth <= alpha
                   &&  (*contHist[0])[movedPiece][to_sq(move)]
@@ -1135,6 +1135,12 @@ moves_loop: // When in check, search starts from here
       if (type_of(move) == CASTLING)
           extension = 1;
 
+      // Late irreversible move extension
+      if (   move == ttMove
+          && pos.rule50_count() > 80
+          && (captureOrPromotion || type_of(movedPiece) == PAWN))
+          extension = 2;
+
       // Add extension to new depth
       newDepth += extension;