Today, we are excited to announce the release of Koivisto 9. After a six-month break, we are back and eager to continue development. The majority of the strength increase since Koivisto 8 comes from improvements in training data, but we also made some small search adjustments.
ELO | 89.70 +- 3.53 (95%)
CONF | 8.0+0.08s Threads=1 Hash=8MB
GAMES | N: 20000 W: 7876 L: 2824 D: 9300
We had the pleasure of working with Jay (author of Berserk) which resulted in both of our engines merging and sharing a neural network training framework as well as training data. This collaboration led to a significant increase in strength:
ELO | 19.41 +- 6.65 (95%)
SPRT | 40.0+0.40s Threads=1 Hash=64MB
LLR | 2.95 (-2.94, 2.94) [0.00, 2.50]
GAMES | N: 5072 W: 1369 L: 1086 D: 2617
ELO | 20.02 +- 6.80 (95%)
SPRT | 8.0+0.08s Threads=1 Hash=8MB
LLR | 2.96 (-2.94, 2.94) [0.00, 2.50]
GAMES | N: 4968 W: 1373 L: 1087 D: 2508
The addition of more training data also contributed to nice gains:
ELO | 29.79 +- 2.91 (95%)
CONF | 8.0+0.08s Threads=1 Hash=8MB
GAMES | N: 16848 W: 3334 L: 1893 D: 11621
Although we don't have regression tests to show for the search improvements and speed-ups, they are where the rest of the gains come from. Attached you can find executables for AVX2 and SSE systems. Executables for PEXT and/or AVX512 systems are available via Ipman.
With love and appreciation,
Finny and Kimmy.