Remove razoring history update.

locutus2 · vondele · commit 1cb9afbdc04f · 2023-11-03T22:47:31.000+01:00
The recently commit 'Rewarding Quiet Moves that Enable Razoring' add a history update if razoring. But its contains also many tuned values all over the search. Following tests shows that the tuned values and not the added history update is responsible for the elo gain. So remove later. Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 29376 W: 7641 L: 7410 D: 14325 Ptnml(0-2): 100, 3411, 7451, 3610, 116 https://tests.stockfishchess.org/tests/view/653c9fe1cc309ae839562070 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 242922 W: 59879 L: 59885 D: 123158 Ptnml(0-2): 129, 27764, 65688, 27744, 136 https://tests.stockfishchess.org/tests/view/653d06cbcc309ae839562735 closes #4858 Bench: 1286104
diff --git a/src/search.cpp b/src/search.cpp
@@ -764,18 +764,7 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo
     {
         value = qsearch<NonPV>(pos, ss, alpha - 1, alpha);
         if (value < alpha)
-        {
-            if (!priorCapture && prevSq != SQ_NONE)
-            {
-                int bonus = (depth > 6) + (PvNode || cutNode) + (value < alpha - 658)
-                          + ((ss - 1)->moveCount > 11);
-                update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
-                                              stat_bonus(depth) * bonus);
-                thisThread->mainHistory[~us][from_to((ss - 1)->currentMove)]
-                  << stat_bonus(depth) * bonus / 2;
-            }
             return value;
-        }
     }
 
     // Step 8. Futility pruning: child node (~40 Elo)
