X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fsearch.cpp;h=1e9c5010c97df7c56f2221b6b96081bdd49dc466;hb=5339ab57d80b19de3cb664b62fd40b626bc1634b;hp=13fb4b300936492657ee375d0d14c3e9bf460e46;hpb=76ed0ab5015f41715453a7efcedd57a7a5c962da;p=stockfish

diff --git a/src/search.cpp b/src/search.cpp
index 13fb4b30..1e9c5010 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -290,12 +290,11 @@ void MainThread::search() {
       {
           th->maxPly = 0;
           th->rootDepth = DEPTH_ZERO;
-          th->searching = true;
           if (th != this)
           {
               th->rootPos = Position(rootPos, th);
               th->rootMoves = rootMoves;
-              th->notify_one(); // Wake up the thread and start searching
+              th->start_searching();
           }
       }
 
@@ -324,7 +323,7 @@ void MainThread::search() {
   // Wait until all threads have finished
   for (Thread* th : Threads)
       if (th != this)
-          th->join();
+          th->wait_for_search_finished();
 
   // Check if there are threads with a better score than main thread.
   Thread* bestThread = this;
@@ -921,7 +920,8 @@ moves_loop: // When in check search starts from here
               continue;
 
           // History based pruning
-          if (   depth <= 3 * ONE_PLY
+          if (   depth <= 4 * ONE_PLY
+              && move != ss->killers[0]
               && thisThread->history[pos.moved_piece(move)][to_sq(move)] < VALUE_ZERO
               && cmh[pos.moved_piece(move)][to_sq(move)] < VALUE_ZERO)
               continue;