Remove bonus for killers.

lonfom169 · vondele · commit 66da1e802c22 · 2020-11-29T16:40:06.000+01:00
Passed non-regression STC: LLR: 2.94 (-2.94,2.94) {-1.25,0.25} Total: 14712 W: 1416 L: 1315 D: 11981 Ptnml(0-2): 59, 1029, 5082, 1124, 62 https://tests.stockfishchess.org/tests/view/5fbfa31f67cbf42301d6b36e Passed non-regression LTC: LLR: 2.95 (-2.94,2.94) {-0.75,0.25} Total: 27536 W: 1099 L: 1044 D: 25393 Ptnml(0-2): 11, 929, 11838, 974, 16 https://tests.stockfishchess.org/tests/view/5fbfac9167cbf42301d6b371 closes official-stockfish/Stockfish#3241 Bench: 3887644
diff --git a/src/search.cpp b/src/search.cpp
@@ -1257,9 +1257,6 @@ namespace {
               int bonus = value > alpha ?  stat_bonus(newDepth)
                                         : -stat_bonus(newDepth);
 
-              if (move == ss->killers[0])
-                  bonus += bonus / 4;
-
               update_continuation_histories(ss, movedPiece, to_sq(move), bonus);
           }
       }

Original file line number	Diff line number	Diff line change
`@@ -1257,9 +1257,6 @@ namespace {`
`1257`	`1257`	`int bonus = value > alpha ? stat_bonus(newDepth)`
`1258`	`1258`	`: -stat_bonus(newDepth);`
`1259`	`1259`
`1260`		`- if (move == ss->killers[0])`
`1261`		`- bonus += bonus / 4;`
`1262`		`-`
`1263`	`1260`	`update_continuation_histories(ss, movedPiece, to_sq(move), bonus);`
`1264`	`1261`	`}`
`1265`	`1262`	`}`