X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=4b90ab1c973fc7fd60fdca3da67c4bada26648d8;hp=086761a3561b879227231d72279b5c191f015a31;hb=9f312c80d918c6f669dcf83df3d4332e02bfa1d9;hpb=648c7ec25db2040c0af34dd846dfa3f57af5ad0a

diff --git a/src/search.cpp b/src/search.cpp
index 086761a3..4b90ab1c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -418,7 +418,7 @@ void Thread::search() {
               beta  = std::min(previousScore + delta, VALUE_INFINITE);
 
               // Adjust contempt based on root move's previousScore (dynamic contempt)
-              int dct = ct + 86 * previousScore / (abs(previousScore) + 176);
+              int dct = ct + (111 - ct / 2) * previousScore / (abs(previousScore) + 176);
 
               contempt = (us == WHITE ?  make_score(dct, dct / 2)
                                       : -make_score(dct, dct / 2));
@@ -999,13 +999,6 @@ moves_loop: // When in check, search starts from here
                && (pos.is_discovery_check_on_king(~us, move) || pos.see_ge(move)))
           extension = 1;
 
-      // Shuffle extension
-      else if (   PvNode
-               && pos.rule50_count() > 18
-               && depth < 3
-               && ++thisThread->shuffleExts < thisThread->nodes.load(std::memory_order_relaxed) / 4)  // To avoid too many extensions
-          extension = 1;
-
       // Passed pawn extension
       else if (   move == ss->killers[0]
                && pos.advanced_pawn_push(move)