- Simplify Away TT Cutoff Return Value Adjustments : official-stockfi…

…sh/Stockfish@5e98a4e engine1 = YaneuraOuNNUE_V830_1024b.exe , eval = tanuki20240131 engine2 = YaneuraOuNNUE_V830_1024c.exe , eval = tanuki20240131 T2,b1000,1430 - 188 - 1382(50.85% R5.93[-4.85,16.71]) winrate black , white = 53.88% , 46.12% ⇨ 強くなってない？ b2000でも計測する。 T2,b2000,1380 - 218 - 1402(49.6% R-2.75[-13.58,8.09]) winrate black , white = 50.75% , 49.25% ⇨ 誤差なので採用する。
yaneurao · Jun 1, 2024 · 135e5b6 · 135e5b6
1 parent bdffdf6
commit 135e5b6
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/source/engine/yaneuraou-engine/yaneuraou-search.cpp b/source/engine/yaneuraou-engine/yaneuraou-search.cpp
@@ -1775,9 +1775,7 @@ Value search(Position& pos, Stack* ss, Value alpha, Value beta, Depth depth, boo
  // if成立時のreturnはしなければならない。
 
  //if (pos.rule50_count() < 90)
- return ttValue >= beta && std::abs(ttValue) < VALUE_TB_WIN_IN_MAX_PLY
- ? (ttValue * 3 + beta) / 4
- : ttValue;
+ return ttValue;
  }
 
  // -----------------------