Chess engine: Caissa 1.16

Caissa - UCI chess engine,  Author: Michał Witanowski

Rating CEDR=3663

v.1.16:

Progression test

TC=10+0.1, Book=UHO_4060_v2.epd

Elo   | 36.65 +- 4.71 (95%)

Conf  | 10.0+0.10s Threads=1 Hash=16MB

Games | N: 10000 W: 2917 L: 1866 D: 5217

Penta | [25, 788, 2387, 1711, 89]

TC=60+0.6, Book=UHO_4060_v2.epd

Elo   | 34.15 +- 7.41 (95%)

Conf  | 60.0+0.60s Threads=1 Hash=128MB

Games | N: 3848 W: 1065 L: 688 D: 2095

Penta | [4, 276, 991, 645, 8]

TC=10+0.1, Book=DFRC.epd

Elo   | 27.03 +- 7.27 (95%)

Conf  | 10.0+0.10s Threads=1 Hash=16MB

Games | N: 3568 W: 866 L: 589 D: 2113

Penta | [23, 311, 879, 508, 63]

Changes

New neural net trained on total 6.9B positions. Introduced high quality games from SPRT tests to the dataset (~350M positions).

SPSA parameter tuning at long time controls

Eval correction improvements

Smaller transposition table entries

Few speedups (around 4% in total)

Various search improvements

Caissa - Rating CEDR progress:

Pl	Engine	Rating	Score	Games	%
648	Caissa 1.15	3663.1	281.50	453	62.14
676	Caissa 1.14.1	3633.8	490.50	901	54.44
690	Caissa 1.13	3611.2	37.50	72	52.08
695	Caissa 1.13.1	3606.1	764.00	1272	60.06
730	Caissa 1.12	3577.5	520.00	898	57.91
738	Caissa 1.10	3569.0	180.00	326	55.21
739	Caissa 1.11	3568.0	241.50	376	64.23
755	Caissa 1.8	3536.0	506.00	902	56.10
776	Caissa 1.7	3508.5	221.50	354	62.57
779	Caissa 1.9	3501.6	80.00	182	43.96
825	Caissa 1.6.3	3449.3	196.00	449	43.65
846	Caissa 1.5	3422.5	249.50	573	43.54
847	Caissa 0.5 NNUE	3420.0	159.50	260	61.35
849	Caissa 1.4	3415.9	535.00	1279	41.83
862	Caissa 1.1	3398.4	91.50	175	52.29
864	Caissa 1.2	3393.2	76.50	182	42.03
870	Caissa 1.3	3387.0	237.50	667	35.61

Caissa 1.16 download