Tune FRC trapped Bishop patch

now that fishtest can deal with FRC, retune this correction. Add an additional fen to bench with cornered B and N. passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.50> Total: 49672 W: 7358 L: 7082 D: 35232 Ptnml(0-2): 241, 4329, 15458, 4529, 279 https://tests.stockfishchess.org/tests/view/61d8b7bf9fea7913d9c63cb7 passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 86688 W: 8308 L: 8007 D: 70373 Ptnml(0-2): 92, 4943, 32989, 5212, 108 https://tests.stockfishchess.org/tests/view/61d92dcb9fea7913d9c650ad closes #3884 Bench: 4326560
official-stockfish · Jan 9, 2022 · c5a280c · dav1312 · Jan 9, 2022 · vondele
1 parent 9ad0ea7
commit c5a280c
Show file tree

Hide file tree

Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/src/benchmark.cpp b/src/benchmark.cpp
@@ -87,6 +87,7 @@ const vector<string> Defaults = {
  // Chess 960
  "setoption name UCI_Chess960 value true",
  "bbqnnrkr/pppppppp/8/8/8/8/PPPPPPPP/BBQNNRKR w HFhf - 0 1 moves g2g3 d7d5 d2d4 c8h3 c1g5 e8d6 g5e7 f7f6",
+ "nqbnrkrb/pppppppp/8/8/8/8/PPPPPPPP/NQBNRKRB w KQkq - 0 1",
  "setoption name UCI_Chess960 value false"
 };
 

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
@@ -1069,8 +1069,8 @@ namespace {
  && pos.piece_on(SQ_G7) == B_PAWN)
  correction += CorneredBishop;
 
- return pos.side_to_move() == WHITE ? Value(5 * correction)
- : -Value(5 * correction);
+ return pos.side_to_move() == WHITE ? Value(3 * correction)
+ : -Value(3 * correction);
  }
 
 } // namespace Eval