v3.0.0
The cooking is complete!
Carp 3.0 irons out a lot of the oddities in the previous release, though still maintaining a lot of
its weird quirks (it is, quite possibly, the strongest Fail Hard engine around). The progtests should
speak for themselves:
STC (8+0.08)
ELO | 438.76 +- 18.13 (95%)
CONF | 8.0+0.08s Threads=1 Hash=16MB
GAMES | N: 3024 W: 2609 L: 33 D: 382
LTC (60+0.6)
ELO | 364.09 +- 24.95 (95%)
CONF | 60.0+0.60s Threads=1 Hash=128MB
GAMES | N: 1000 W: 787 L: 6 D: 207
Changes Overview
- Network improvements: moved to a (768->1024)x2->1 network trained on 3.2B positions
- Countless search improvements and bug fixes.
- Support for Syzygy endgame tablebases.
- Major project structural refactor.
- Massively improved chess backend.
PR List
- Carp0013 by @dede1751 in #9
- Compact moves by @dede1751 in #10
- Use 32b eval internally by @dede1751 in #11
- Nodetm by @dede1751 in #12
- Use more of the time increment by @dede1751 in #13
- TT null move by @dede1751 in #14
- TT static eval by @dede1751 in #15
- Update best_move on Fail High by @dede1751 in #16
- Proper handling of possible mates in QS by @dede1751 in #17
- Remove Delta Pruning in QS by @dede1751 in #18
- Refactor carp::chess crate by @dede1751 in #19
- Better threat generation for legal movegen by @dede1751 in #20
- Fix SEE rejecting equal exchanges. by @dede1751 in #22
- QS TT move by @dede1751 in #23
- Material Scale by @dede1751 in #24
- Singular Extensions by @dede1751 in #25
- Refactor search by @dede1751 in #26
- PGO by @dede1751 in #27
- SEE pruning by @dede1751 in #28
- Fix conthist by @dede1751 in #29
- Fix hist score by @dede1751 in #30
- Implement a MovePicker for staged sorting by @dede1751 in #31
- Fix MovePick scores by @dede1751 in #32
- Thread refactor by @dede1751 in #42
- Keep histories between moves by @dede1751 in #43
- Shift killers back between moves by @dede1751 in #44
- PV Table by @dede1751 in #45
- TT Replacement bug fix + policy change by @dede1751 in #46
- always set global stop flag after main thread stops by @Ciekce in #47
- Fix repetition detection by @dede1751 in #48
- Use a smaller max value for standard histories by @dede1751 in #49
- Refactor codebase with workspaces by @dede1751 in #50
- QS Draws by @dede1751 in #51
- Release CI by @dede1751 in #52
- Build file by @dede1751 in #53
- Use 8 BBs in Board by @dede1751 in #54
- Stop saving temporary static eval entries by @dede1751 in #55
- Syzygy by @dede1751 in #56
- Refactor Movegen by @dede1751 in #57
- QS promos by @dede1751 in #58
- Caphist by @dede1751 in #59
- Sane Replacement by @dede1751 in #61
- Remove killers by @dede1751 in #62
- Fix evals by @dede1751 in #63
- Carp0019 by @dede1751 in #64
Binaries
Binaries are released following the microarchitecture levels. It is recommended to at least use V3. As for MacOS, I was unable to build a V3 binary using Github CI, so it is recommended to build locally, as is explained in the ReadME. If possible, a native build is always recommended.
Special Thanks
Carp development wouldn't be possible without the hardware contributed by the amazing people in the
SWEHosting OpenBench instance: @Adam-Kulju, @Alex2262, @archishou, @Ciekce, @cosmobobak, @crippa1337, @GediminasMasaitis, @jhonnold, @jw1912, @lucametehau, @raklaptudirm, @PGG106, @spamdrew128, @uwuplant and most importantly @JouanDeag.
New Contributors
Full Changelog: v.2.0.0...v3.0.0
