Simplify TT cutoff

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index db9a5a8d01d2a0d729f7e6d390e8995f502b9ffa..c2d35796231b0b9ebcb4a5645553e343a28d46b5 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -616,7 +616,7 @@ namespace {
     // At non-PV nodes we check for an early TT cutoff
     if (  !PvNode
         && !excludedMove
-        && tte->depth() > depth - (tte->bound() == BOUND_EXACT)
+        && tte->depth() > depth
         && ttValue != VALUE_NONE // Possible in case of TT access race or if !ttHit
         && (tte->bound() & (ttValue >= beta ? BOUND_LOWER : BOUND_UPPER)))
     {
@@ -1496,7 +1496,7 @@ moves_loop: // When in check, search starts here
             return bestValue;
         }
 
-        if (PvNode && bestValue > alpha)
+        if (bestValue > alpha)
             alpha = bestValue;
 
         futilityBase = bestValue + 200;
@@ -1608,7 +1608,7 @@ moves_loop: // When in check, search starts here
                 if (PvNode) // Update pv even in fail-high case
                     update_pv(ss->pv, move, (ss+1)->pv);
 
-                if (PvNode && value < beta) // Update alpha here!
+                if (value < beta) // Update alpha here!
                     alpha = value;
                 else
                     break; // Fail high