mirror of
https://github.com/sockspls/badfish
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cb4bda0f49
The two lines of code in the patch seem to be just as good as master. 1. We now only look at the current square to see if it is currently backward, whereas master looks there AND further ahead in the current file (master would declare a pawn "backward" even though it could still safely advance a little). This simplification allows us to avoid the use of the difficult logic with `backmost_sq(Us, neighbours | stoppers)`. 2. The condition `relative_rank(Us,s) < RANK_5` is simplified away. Passed STC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 68132 W: 14025 L: 13992 D: 40115 http://tests.stockfishchess.org/tests/view/5aedc97a0ebc5902a4099fd6 Passed LTC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 23789 W: 3643 L: 3527 D: 16619 http://tests.stockfishchess.org/tests/view/5aee4f970ebc5902a409a03a Ideas for further work: • The new code flags some pawns on the 5th rank as backward, which was not the case in the old master. So maybe we should test a version with that included? • Further tweaks of the backward condition with [0..5] bounds? Closes https://github.com/official-stockfish/Stockfish/pull/1583 Bench: 5122789 |
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| .. | ||
| syzygy | ||
| benchmark.cpp | ||
| bitbase.cpp | ||
| bitboard.cpp | ||
| bitboard.h | ||
| endgame.cpp | ||
| endgame.h | ||
| evaluate.cpp | ||
| evaluate.h | ||
| main.cpp | ||
| Makefile | ||
| material.cpp | ||
| material.h | ||
| misc.cpp | ||
| misc.h | ||
| movegen.cpp | ||
| movegen.h | ||
| movepick.cpp | ||
| movepick.h | ||
| pawns.cpp | ||
| pawns.h | ||
| position.cpp | ||
| position.h | ||
| psqt.cpp | ||
| search.cpp | ||
| search.h | ||
| thread.cpp | ||
| thread.h | ||
| thread_win32.h | ||
| timeman.cpp | ||
| timeman.h | ||
| tt.cpp | ||
| tt.h | ||
| types.h | ||
| uci.cpp | ||
| uci.h | ||
| ucioption.cpp | ||