ablation: no singular response extension for opponent B4 attack

test r15
dhbloo · Jul 26, 2024 · f980f47 · f980f47
1 parent 49a8c22
commit f980f47
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/Rapfi/search/ab/search.cpp b/Rapfi/search/ab/search.cpp
@@ -1024,12 +1024,12 @@ Value search(Board &board, SearchStack *ss, Value alpha, Value beta, Depth depth
         Depth extension = 0;
 
         // Singular response extension for opponent B4 attack
-        if (oppo5)
-            extension = OPPO5_EXT;
+        //if (oppo5)
+        //    extension = OPPO5_EXT;
 
         // Singular extension: only one move fails high while other moves fails low on a search of
         // (alpha-s, beta-s), then this move is singular and should be extended.
-        else if (!RootNode && depth >= SE_DEPTH && move == ttMove
+        /*else*/ if (!RootNode && depth >= SE_DEPTH && move == ttMove
                  && !skipMove                                  // No recursive singular search
                  && std::abs(ttValue) < VALUE_MATE_IN_MAX_PLY  // ttmove value is not a mate
                  && (ttBound & BOUND_LOWER)                    // ttMove failed high last time