From: Marco Costalba <mcostalba@gmail.com>
Date: Sun, 10 Oct 2010 08:04:09 +0000 (+0100)
Subject: Use VALUE_DRAW instead of VALUE_ZERO where better
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=2feeb206ff3dfa2a8419c4541383afd7eee2e5ed

Use VALUE_DRAW instead of VALUE_ZERO where better

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
---

diff --git a/src/endgame.cpp b/src/endgame.cpp
index abf27d52..f9feb00e 100644
--- a/src/endgame.cpp
+++ b/src/endgame.cpp
@@ -367,12 +367,12 @@ Value EvaluationFunction<KBBKN>::apply(const Position& pos) const {
 /// king alone are always draw.
 template<>
 Value EvaluationFunction<KmmKm>::apply(const Position&) const {
-  return VALUE_ZERO;
+  return VALUE_DRAW;
 }
 
 template<>
 Value EvaluationFunction<KNNK>::apply(const Position&) const {
-  return VALUE_ZERO;
+  return VALUE_DRAW;
 }
 
 /// KBPKScalingFunction scales endgames where the stronger side has king,
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 132b8c1b..0f0034b2 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -334,7 +334,7 @@ Value do_evaluate(const Position& pos, Value& margin) {
   }
 
   // Scale winning side if position is more drawish that what it appears
-  ScaleFactor sf = eg_value(bonus) > VALUE_ZERO ? mi->scale_factor(pos, WHITE)
+  ScaleFactor sf = eg_value(bonus) > VALUE_DRAW ? mi->scale_factor(pos, WHITE)
                                                 : mi->scale_factor(pos, BLACK);
   Phase phase = mi->game_phase();
 
diff --git a/src/search.cpp b/src/search.cpp
index d54794bb..fca542e0 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -994,7 +994,7 @@ namespace {
 
     // Step 2. Check for aborted search and immediate draw
     if (AbortSearch || ThreadsMgr.thread_should_stop(threadID))
-        return VALUE_ZERO;
+        return VALUE_DRAW;
 
     if (pos.is_draw() || ply >= PLY_MAX - 1)
         return VALUE_DRAW;