Extra bonus for capture creating a huge fail high

STC: http://tests.stockfishchess.org/tests/view/5b114f3d0ebc596e9e0881f6 LLR: 2.95 (-2.94,2.94) [0.00,5.00] Total: 13007 W: 2730 L: 2541 D: 7736 LTC: http://tests.stockfishchess.org/tests/view/5b1176740ebc59033d2d52c6 LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 15594 W: 2417 L: 2239 D: 10938 See #1627 Bench: 4790240
official-stockfish · Jun 2, 2018 · c5d6ae8 · c5d6ae8 · DU-jdto · Jun 3, 2018
1 parent a0486ec
commit c5d6ae8
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/search.cpp b/src/search.cpp
@@ -1166,7 +1166,8 @@ namespace {
         if (!pos.capture_or_promotion(bestMove))
             update_quiet_stats(pos, ss, bestMove, quietsSearched, quietCount, stat_bonus(depth));
         else
-            update_capture_stats(pos, bestMove, capturesSearched, captureCount, stat_bonus(depth));
+            update_capture_stats(pos, bestMove, capturesSearched, captureCount,
+                                 stat_bonus(depth + bool(bestValue > beta + KnightValueMg) * ONE_PLY));
 
         // Extra penalty for a quiet TT move in previous ply when it gets refuted
         if ((ss-1)->moveCount == 1 && !pos.captured_piece())