X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fthread.cpp;h=2b09a69fad957307932a7ed427ea66d285e95c52;hp=782cf1acc0dd5153fb8ba3bebad8cf69bc35da12;hb=3b8f66f8accefe86db9296fa276e4b33cdc450e2;hpb=d3608c4e79a29110f4c4a369d7207c6dd8e01f34

diff --git a/src/thread.cpp b/src/thread.cpp
index 782cf1ac..2b09a69f 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -252,7 +252,7 @@ Thread* ThreadPool::available_slave(Thread* master) const {
 template <bool Fake>
 void Thread::split(Position& pos, Stack* ss, Value alpha, Value beta, Value* bestValue,
                    Move* bestMove, Depth depth, Move threatMove, int moveCount,
-                   MovePicker* movePicker, int nodeType) {
+                   MovePicker* movePicker, int nodeType, bool cutNode) {
 
   assert(pos.pos_is_ok());
   assert(*bestValue <= alpha && alpha < beta && beta <= VALUE_INFINITE);
@@ -274,6 +274,7 @@ void Thread::split(Position& pos, Stack* ss, Value alpha, Value beta, Value* bes
   sp.alpha = alpha;
   sp.beta = beta;
   sp.nodeType = nodeType;
+  sp.cutNode = cutNode;
   sp.movePicker = movePicker;
   sp.moveCount = moveCount;
   sp.pos = &pos;
@@ -339,8 +340,8 @@ void Thread::split(Position& pos, Stack* ss, Value alpha, Value beta, Value* bes
 }
 
 // Explicit template instantiations
-template void Thread::split<false>(Position&, Stack*, Value, Value, Value*, Move*, Depth, Move, int, MovePicker*, int);
-template void Thread::split< true>(Position&, Stack*, Value, Value, Value*, Move*, Depth, Move, int, MovePicker*, int);
+template void Thread::split<false>(Position&, Stack*, Value, Value, Value*, Move*, Depth, Move, int, MovePicker*, int, bool);
+template void Thread::split< true>(Position&, Stack*, Value, Value, Value*, Move*, Depth, Move, int, MovePicker*, int, bool);
 
 
 // wait_for_think_finished() waits for main thread to go to sleep then returns
@@ -366,10 +367,14 @@ void ThreadPool::start_thinking(const Position& pos, const LimitsType& limits,
   Signals.stopOnPonderhit = Signals.firstRootMove = false;
   Signals.stop = Signals.failedLowAtRoot = false;
 
+  RootMoves.clear();
   RootPos = pos;
   Limits = limits;
-  SetupStates = states; // Ownership transfer here
-  RootMoves.clear();
+  if (states.get()) // If we don't set a new position, preserve current state
+  {
+      SetupStates = states; // Ownership transfer here
+      assert(!states.get());
+  }
 
   for (MoveList<LEGAL> it(pos); *it; ++it)
       if (   searchMoves.empty()