X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsearch.cpp;h=51d3ae8cba3910b48301adab0507316e09acb850;hp=aafbf80f94aef804009883e41bbfc8d28b96c3b6;hb=27ba611a3da37423a3502e49beeebe11c9a11d8e;hpb=ecd3218b6b24bb54509dbe6e9b24517b7df7390d

diff --git a/src/search.cpp b/src/search.cpp
index aafbf80f..51d3ae8c 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -244,6 +244,7 @@ void MainThread::search() {
 
   Color us = rootPos.side_to_move();
   Time.init(Limits, us, rootPos.game_ply());
+  TT.new_search();
 
   int contempt = Options["Contempt"] * PawnValueEg / 100; // From centipawns
   DrawValue[ us] = VALUE_DRAW - Value(contempt);
@@ -334,7 +335,7 @@ void Thread::search() {
   MainThread* mainThread = (this == Threads.main() ? Threads.main() : nullptr);
 
   std::memset(ss-4, 0, 7 * sizeof(Stack));
-  for(int i = 4; i > 0; i--)
+  for (int i = 4; i > 0; i--)
      (ss-i)->history = &this->counterMoveHistory[NO_PIECE][0]; // Use as sentinel
 
   bestValue = delta = alpha = -VALUE_INFINITE;
@@ -347,7 +348,6 @@ void Thread::search() {
       EasyMove.clear();
       mainThread->easyMovePlayed = mainThread->failedLow = false;
       mainThread->bestMoveChanges = 0;
-      TT.new_search();
   }
 
   size_t multiPV = Options["MultiPV"];
@@ -784,9 +784,7 @@ namespace {
         &&  abs(beta) < VALUE_MATE_IN_MAX_PLY)
     {
         Value rbeta = std::min(beta + 200, VALUE_INFINITE);
-        Depth rdepth = depth - 4 * ONE_PLY;
 
-        assert(rdepth >= ONE_PLY);
         assert(is_ok((ss-1)->currentMove));
 
         MovePicker mp(pos, ttMove, rbeta - ss->staticEval);
@@ -797,8 +795,9 @@ namespace {
                 ss->currentMove = move;
                 ss->history = &thisThread->counterMoveHistory[pos.moved_piece(move)][to_sq(move)];
 
+                assert(depth >= 5 * ONE_PLY);
                 pos.do_move(move, st);
-                value = -search<NonPV>(pos, ss+1, -rbeta, -rbeta+1, rdepth, !cutNode, false);
+                value = -search<NonPV>(pos, ss+1, -rbeta, -rbeta+1, depth - 4 * ONE_PLY, !cutNode, false);
                 pos.undo_move(move);
                 if (value >= rbeta)
                     return value;