Double Impact of Gain tables

Very unorthodox idea. After 16000 games at 60"+0.05 ELO: 3.14 +-3.4 (95%) LOS: 96.6% Total: 13407 W: 2278 L: 2157 D: 8972 bench: 4705335
official-stockfish · Apr 3, 2013 · 36c82b7 · 36c82b7
1 parent 7d42d02
commit 36c82b7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -875,7 +875,7 @@ namespace {
           // but fixing this made program slightly weaker.
           Depth predictedDepth = newDepth - reduction<PvNode>(depth, moveCount);
           futilityValue =  ss->staticEval + ss->evalMargin + futility_margin(predictedDepth, moveCount)
-                         + Gain[pos.piece_moved(move)][to_sq(move)];
+                         + 2 * Gain[pos.piece_moved(move)][to_sq(move)];
 
           if (futilityValue < beta)
           {