search(): Move nullValue variable into local scope

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index b75870ff5021968f66d0e0a0aa02271a310cec00..1572333b9c35085734c06646001b707657d7bb88 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -505,7 +505,7 @@ void Thread::search() {
 
               bool doEasyMove =   rootMoves[0].pv[0] == easyMove
                                && mainThread->bestMoveChanges < 0.03
-                               && Time.elapsed() > Time.optimum() * 5 / 42;
+                               && Time.elapsed() > Time.optimum() * 5 / 44;
 
               if (   rootMoves.size() == 1
                   || Time.elapsed() > Time.optimum() * unstablePvFactor * improvingFactor / 628
@@ -564,7 +564,7 @@ namespace {
     Key posKey;
     Move ttMove, move, excludedMove, bestMove;
     Depth extension, newDepth;
-    Value bestValue, value, ttValue, eval, nullValue;
+    Value bestValue, value, ttValue, eval;
     bool ttHit, inCheck, givesCheck, singularExtensionNode, improving;
     bool captureOrPromotion, doFullDepthSearch, moveCountPruning;
     Piece moved_piece;
@@ -657,7 +657,7 @@ namespace {
                     update_cm_stats(ss-1, pos.piece_on(prevSq), prevSq, -stat_bonus(depth + ONE_PLY));
             }
             // Penalty for a quiet ttMove that fails low
-            else if (ttValue < alpha && !pos.capture_or_promotion(ttMove))
+            else if (!pos.capture_or_promotion(ttMove))
             {
                 Value penalty = -stat_bonus(depth + ONE_PLY);
                 thisThread->history.update(pos.side_to_move(), ttMove, penalty);
@@ -768,8 +768,8 @@ namespace {
         Depth R = ((823 + 67 * depth / ONE_PLY) / 256 + std::min((eval - beta) / PawnValueMg, 3)) * ONE_PLY;
 
         pos.do_null_move(st);
-        nullValue = depth-R < ONE_PLY ? -qsearch<NonPV, false>(pos, ss+1, -beta, -beta+1)
-                                      : - search<NonPV>(pos, ss+1, -beta, -beta+1, depth-R, !cutNode, true);
+        Value nullValue = depth-R < ONE_PLY ? -qsearch<NonPV, false>(pos, ss+1, -beta, -beta+1)
+                                            : - search<NonPV>(pos, ss+1, -beta, -beta+1, depth-R, !cutNode, true);
         pos.undo_null_move();
 
         if (nullValue >= beta)