Reduce increase progression of aspiration window

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 1eddff5813f2d5afc45f106f53dd8c1278b4b7a2..02fc41be309d85f3f654d19b200a635bfa55c24f 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -931,8 +931,8 @@ namespace {
                 print_pv_info(pos, ss, alpha, beta, value);
 
                 // Prepare for a research after a fail high, each time with a wider window
                 print_pv_info(pos, ss, alpha, beta, value);
 
                 // Prepare for a research after a fail high, each time with a wider window

-                researchCountFH++;

                 *betaPtr = beta = Min(beta + AspirationDelta * (1 << researchCountFH), VALUE_INFINITE);
                 *betaPtr = beta = Min(beta + AspirationDelta * (1 << researchCountFH), VALUE_INFINITE);

+                researchCountFH++;

 
             } // End of fail high loop
 
 
             } // End of fail high loop
 


@@ -1017,8 +1017,8 @@ namespace {
             break;
 
         // Prepare for a research after a fail low, each time with a wider window
             break;
 
         // Prepare for a research after a fail low, each time with a wider window

-        researchCountFL++;

         *alphaPtr = alpha = Max(alpha - AspirationDelta * (1 << researchCountFL), -VALUE_INFINITE);
         *alphaPtr = alpha = Max(alpha - AspirationDelta * (1 << researchCountFL), -VALUE_INFINITE);

+        researchCountFL++;

 
     } // Fail low loop
 
 
     } // Fail low loop