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🔍 LMR: reduce more if there's a TT move and a capture #706

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merged 1 commit into from
Apr 10, 2024

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@eduherminio eduherminio commented Apr 4, 2024

Idea by Sirius author, although it's present in a bunch of engines.

8+0.08

Score of Lynx-lmr-tt-capture-reduction-increase-2831-win-x64 vs Lynx 2824 - main: 5704 - 5777 - 7726  [0.498] 19207
...      Lynx-lmr-tt-capture-reduction-increase-2831-win-x64 playing White: 4019 - 1723 - 3861  [0.620] 9603
...      Lynx-lmr-tt-capture-reduction-increase-2831-win-x64 playing Black: 1685 - 4054 - 3865  [0.377] 9604
...      White vs Black: 8073 - 3408 - 7726  [0.621] 19207
Elo difference: -1.3 +/- 3.8, LOS: 24.8 %, DrawRatio: 40.2 %
SPRT: llr -2.25 (-77.9%), lbound -2.25, ubound 2.89 - H0 was accepted

40+0.4

Score of Lynx-lmr-tt-capture-reduction-increase-2831-win-x64 vs Lynx 2824 - main: 6629 - 6342 - 10325  [0.506] 23296
...      Lynx-lmr-tt-capture-reduction-increase-2831-win-x64 playing White: 4972 - 1570 - 5106  [0.646] 11648
...      Lynx-lmr-tt-capture-reduction-increase-2831-win-x64 playing Black: 1657 - 4772 - 5219  [0.366] 11648
...      White vs Black: 9744 - 3227 - 10325  [0.640] 23296
Elo difference: 4.3 +/- 3.3, LOS: 99.4 %, DrawRatio: 44.3 %
SPRT: llr 2.89 (100.0%), lbound -2.25, ubound 2.89 - H1 was accepted

@eduherminio eduherminio changed the title LMR: reduce more if there's a TT move and a capture 🔍 LMR: reduce more if there's a TT move and a capture Apr 10, 2024
@eduherminio eduherminio force-pushed the lmr/tt-capture-reduction-increase branch from 22f6411 to e8718b5 Compare April 10, 2024 11:49
@eduherminio eduherminio marked this pull request as ready for review April 10, 2024 11:50
@eduherminio eduherminio enabled auto-merge (squash) April 10, 2024 11:50
@eduherminio eduherminio merged commit 0088d66 into main Apr 10, 2024
27 checks passed
@eduherminio eduherminio deleted the lmr/tt-capture-reduction-increase branch April 10, 2024 11:57
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