Remove early return in Probcut code

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index d16d9cad897add4d463bbb8263fa9fee5c44b6e6..788be984d13ab69c1445e1797ff467666a2cfeef 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -847,7 +847,7 @@ namespace {
 
     probCutBeta = beta + 209 - 44 * improving;
 
-    // Step 9. ProbCut (~10 Elo)
+    // Step 9. ProbCut (~4 Elo)
     // If we have a good enough capture and a reduced search returns a value
     // much above beta, we can (almost) safely prune the previous move.
     if (   !PvNode
@@ -862,15 +862,6 @@ namespace {
              && ttValue != VALUE_NONE
              && ttValue < probCutBeta))
     {
-        // if ttMove is a capture and value from transposition table is good enough produce probCut
-        // cutoff without digging into actual probCut search
-        if (   ss->ttHit
-            && tte->depth() >= depth - 3
-            && ttValue != VALUE_NONE
-            && ttValue >= probCutBeta
-            && ttMove
-            && pos.capture_or_promotion(ttMove))
-            return probCutBeta;
 
         assert(probCutBeta < VALUE_INFINITE);