Chess engine: Viridithas Author:Cosmo
Rating Chess Engines Diary CEDR=3616
v.14.0.0:
This release brings significant improvements to Viridithas' neural network architecture, which is now a 16-input-bucket 8-output-bucket 2048x2 -> 16 -> 32 -> 1 network, codenamed hyperstition.
Upgrades, in chronological order:
Remove internal iterative deepening. (#158)
Make UCI implementation more robust. (#159)
Add cuckoo-hashing-based repetition detection. (#163)
Tighter memory layout for the transposition table. (#164)
Update history heuristic on TT cutoffs. (#166)
Add neural network output buckets. (#167)
Use TT to correct static evaluation in QS. (#170)
Make output nicer on legacy Windows consoles. (#172)
Double king bucket count and increase HL to 2048. (#173)
Perform IIR when a TT-entry is low-quality. (#174)
Only SEE-prune moves that land on threatened squares. (#175)
Upgrade network architecture to three-layer network. (#179)
Add Ponder. (#181)
AVX512 support. (#182)
Elo comparison against v13.0.0
STC:
Elo | 22.27 +- 6.91 (95%)
Conf | 8.0+0.08s Threads=1 Hash=16MB
Games | N: 3000 W: 837 L: 645 D: 1518
Penta | [22, 277, 719, 451, 31]
https://chess.swehosting.se/test/7796/
LTC:
Elo | 45.68 +- 10.59 (95%)
Conf | 60.0+0.60s Threads=1 Hash=128MB
Games | N: 1002 W: 310 L: 179 D: 513
Penta | [1, 62, 246, 189, 3]
https://chess.swehosting.se/test/7798/
(D)FRC:
Elo | 4.96 +- 7.36 (95%)
Conf | 8.0+0.08s Threads=1 Hash=16MB
Games | N: 3010 W: 662 L: 619 D: 1729
Penta | [42, 338, 703, 379, 43]
https://chess.swehosting.se/test/7799/
Thanks as always to everyone who helps me out with viri's development, especially everyone on https://chess.swehosting.se/, you're a great bunch.
Binaries are separated by the microarchitecture levels. Most people should use v3!
v1 is supported on all x86-64 CPUs.
v2 has POPCNT, SSSE3, etc.
v3 has AVX2, BMI, LZCNT, etc.
v4 has AVX512, VNNI, etc.
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