Remove VALUE_KNOWN_WIN.

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 936aa0db77fefa712ebc6012ff184eb7d571ff10..3e19000a5d6d72c1f1986e70e7981d3df4c2dc86 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -778,7 +778,7 @@ namespace {
         &&  depth < 9
         &&  eval - futility_margin(depth, cutNode && !ss->ttHit, improving) - (ss-1)->statScore / 306 >= beta
         &&  eval >= beta
-        &&  eval < 24923) // larger than VALUE_KNOWN_WIN, but smaller than TB wins
+        &&  eval < 24923) // smaller than TB wins
         return eval;
 
     // Step 9. Null move search with verification search (~35 Elo)
@@ -908,8 +908,8 @@ moves_loop: // When in check, search starts here
         && (tte->bound() & BOUND_LOWER)
         && tte->depth() >= depth - 4
         && ttValue >= probCutBeta
-        && abs(ttValue) <= VALUE_KNOWN_WIN
-        && abs(beta) <= VALUE_KNOWN_WIN)
+        && abs(ttValue) < VALUE_TB_WIN_IN_MAX_PLY
+        && abs(beta) < VALUE_TB_WIN_IN_MAX_PLY)
         return probCutBeta;
 
     const PieceToHistory* contHist[] = { (ss-1)->continuationHistory, (ss-2)->continuationHistory,
@@ -1050,7 +1050,7 @@ moves_loop: // When in check, search starts here
               &&  move == ttMove
               && !excludedMove // Avoid recursive singular search
            /* &&  ttValue != VALUE_NONE Already implicit in the next condition */
-              &&  abs(ttValue) < VALUE_KNOWN_WIN
+              &&  abs(ttValue) < VALUE_TB_WIN_IN_MAX_PLY
               && (tte->bound() & BOUND_LOWER)
               &&  tte->depth() >= depth - 3)
           {
@@ -1541,7 +1541,7 @@ moves_loop: // When in check, search starts here
             // Futility pruning and moveCount pruning (~10 Elo)
             if (   !givesCheck
                 &&  to_sq(move) != prevSq
-                &&  futilityBase > -VALUE_KNOWN_WIN
+                &&  futilityBase > VALUE_TB_LOSS_IN_MAX_PLY
                 &&  type_of(move) != PROMOTION)
             {
                 if (moveCount > 2)