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Caissa v1.17
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@Witek902 Witek902 released this 12 Feb 13:35
· 41 commits to master since this release
1.17
3441dac

Progression test

TC=8+0.08, Book=UHO_Lichess_4852_v1.epd

Elo   | 20.60 +- 4.85 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=8MB
Games | N: 9690 W: 2670 L: 2096 D: 4924
Penta | [38, 947, 2337, 1449, 74]

TC=60+0.6, Book=UHO_Lichess_4852_v1.epd

Elo   | 19.83 +- 6.47 (95%)
Conf  | 60.0+0.60s Threads=1 Hash=64MB
Games | N: 5000 W: 1272 L: 987 D: 2741
Penta | [4, 442, 1332, 709, 13]

TC=8+0.08, Book=DFRC.epd

Elo   | 15.59 +- 6.38 (95%)
Conf  | 8.0+0.08s Threads=1 Hash=8MB
Games | N: 4394 W: 948 L: 751 D: 2695
Penta | [28, 433, 1110, 566, 60]

Changes

  • New neural net trained on total 7.1B positions. Introduced more high quality games from SPRT tests to the dataset (~220M positions) and random endgame positions scored with 7-man TB (~40M positions). Finetuning previous net for over 50B iterations.
  • Small speedup
  • Search improvements:
    • Prevent search explosions in LMR
    • Simplify LMR history formula
    • Additional history bonus based on score difference
    • Store eval in TT as soon as possible
    • Higher RFP margin if opponent is threating a capture
  • Use threats info to generate less illegal king moves
  • Tweak transposition table replacement scheme
Assets 7
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