Introduce separate counter-move tables for captures

[stockfish] / src / thread.cpp

diff --git a/src/thread.cpp b/src/thread.cpp
index 90ec274d82052827dda6bd891534bd69e523b4f5..3c9473c283f249415e85427b7379574d6f556780 100644 (file)
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -70,11 +70,13 @@ void Thread::clear() {
   mainHistory.fill(0);
   captureHistory.fill(0);
 
-  for (auto& to : continuationHistory)
-      for (auto& h : to)
-          h->fill(0);
+  for (StatsType c : { NoCaptures, Captures })
+      for (auto& to : continuationHistory[c])
+          for (auto& h : to)
+              h->fill(0);
 
-  continuationHistory[NO_PIECE][0]->fill(Search::CounterMovePruneThreshold - 1);
+  for (StatsType c : { NoCaptures, Captures })
+      continuationHistory[c][NO_PIECE][0]->fill(Search::CounterMovePruneThreshold - 1);
 }
 
 /// Thread::start_searching() wakes up the thread that will start the search
@@ -204,7 +206,7 @@ void ThreadPool::start_thinking(Position& pos, StateListPtr& states,
   for (Thread* th : *this)
   {
       th->shuffleExts = th->nodes = th->tbHits = th->nmpMinPly = 0;
-      th->rootDepth = th->completedDepth = DEPTH_ZERO;
+      th->rootDepth = th->completedDepth = 0;
       th->rootMoves = rootMoves;
       th->rootPos.set(pos.fen(), pos.is_chess960(), &setupStates->back(), th);
   }