Simplify generate_all -> castling #2580
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how is this better? |
ddugovic
reviewed
Mar 12, 2020
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It is better because it is 7 less lines and reads a bit better. IMHO. |
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My biggest complaint is that |
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Just read it about 1000 times. . it will become more clear. :) |
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thanks! For future PRs, please try to have a PR comment or commit message that I can easily transform in our standard style changelog entry. |
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Will do. thx.
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silversolver1
added a commit
to silversolver1/Stockfish
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this pull request
Mar 14, 2020
* Equations for edges and corners. This is a functional simplification that removes the large arrays in endgames.cpp. It also fixes a recently introduced bug (960d59d) in KNBvK, now using flip_file() instead of ~. One fen added to bench to increase endgame coverage. STC LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 174724 W: 33325 L: 33404 D: 107995 Ptnml(0-2): 2503, 19607, 43181, 19608, 2463 http://tests.stockfishchess.org/tests/view/5e6448ffe42a5c3b3ca2e287 LTC LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 35640 W: 4679 L: 4621 D: 26340 Ptnml(0-2): 189, 2991, 11424, 3005, 211 http://tests.stockfishchess.org/tests/view/5e650b24e42a5c3b3ca2e2d8 closes official-stockfish#2577 Bench: 5527957 * Remove set statScore to zero Simplification. Removes setting statScore to zero if negative. STC: LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 84820 W: 16100 L: 16033 D: 52687 Ptnml(0-2): 1442, 9865, 19723, 9944, 1436 https://tests.stockfishchess.org/tests/view/5e654fdae42a5c3b3ca2e2f8 LTC: LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 57658 W: 7435 L: 7391 D: 42832 Ptnml(0-2): 441, 5397, 17104, 5451, 436 https://tests.stockfishchess.org/tests/view/5e657ce9e42a5c3b3ca2e307 closes official-stockfish#2578 Bench: 5168890 * simplify castling part of generate_all. somewhat more compact, generates same code. close official-stockfish#2580 No functional change. * Simplify futility pruning parent node only continuation histories seem needed for this purpose. STC: http://tests.stockfishchess.org/tests/view/5e6b88dfe42a5c3b3ca2e4ab LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 113356 W: 21725 L: 21696 D: 69935 Ptnml(0-2): 1999, 13255, 26163, 13240, 2021 LTC: http://tests.stockfishchess.org/tests/view/5e6babbfe42a5c3b3ca2e4c2 LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 22164 W: 2917 L: 2821 D: 16426 Ptnml(0-2): 173, 2040, 6548, 2160, 161 closes official-stockfish#2583 bench: 4839496 * Small cleanups closes official-stockfish#2567 No functional change. Co-authored-by: protonspring <mike@whiteley.org> Co-authored-by: pb00067 <pb00067@PHXL0356.wp.lan> Co-authored-by: Joost VandeVondele <Joost.VandeVondele@gmail.com>
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This is a non-functional simplification which generates exactly the same executable.
To me, this more clearly says:
if (we_can_castle_at_all), try king_side and queen_side.