X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=2828ccda35bebb57397034894ce8e434e8de784c;hp=6b8949569f753b38f1f9ee98960d1a8fba7bdaf9;hb=0784bd542bf17679febd9d9d87858fd0fd0424f9;hpb=dc0030de4fdece2851dd0072c9aea53695ed90ce

diff --git a/src/search.cpp b/src/search.cpp
index 6b894956..2828ccda 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -507,7 +507,7 @@ void Thread::search() {
           std::stable_sort(rootMoves.begin(), rootMoves.begin() + PVIdx + 1);
 
           if (!mainThread)
-              break;
+              continue;
 
           if (Signals.stop)
               sync_cout << "info nodes " << Threads.nodes_searched()
@@ -1013,13 +1013,12 @@ moves_loop: // When in check search starts from here
           Value fmValue = (fm ? (*fm)[pos.piece_on(to_sq(move))][to_sq(move)] : VALUE_ZERO);
           Value fm2Value = (fm2 ? (*fm2)[pos.piece_on(to_sq(move))][to_sq(move)] : VALUE_ZERO);
 
-          // Increase reduction for cut nodes and moves with a bad history
-          if (   (!PvNode && cutNode)
-              || (hValue < VALUE_ZERO && cmhValue <= VALUE_ZERO))
+          // Increase reduction for cut nodes
+          if (!PvNode && cutNode)
               r += ONE_PLY;
 
           // Decrease/increase reduction for moves with a good/bad history
-          int rHist = (hValue + cmhValue + fmValue + fm2Value) / 20000;
+          int rHist = (hValue + cmhValue + fmValue + fm2Value - 10000) / 20000;
           r = std::max(DEPTH_ZERO, r - rHist * ONE_PLY);
 
           // Decrease reduction for moves that escape a capture. Filter out