New binaries for version Ethereal 11.53
Again, feel free to update if you would like. There should be a slight elo gain, and additional UCI reporting.
There is no reason for testers to change from V11.50.
I think that will be the end of this thread
Moderators: hgm, Rebel, chrisw
New binaries for version Ethereal 11.53
+1 Nice work Andrew & Laldon!AndrewGrant wrote: ↑Fri Jun 28, 2019 11:07 pm Hello all,
After five months since the last release, I'm happy to say I have something new to share with you all in an official capacity. I have taken some time away from Ethereal's development, but for now I seem to be back with a vengeance.
In addition to general improvements and gains in elo, this version of Ethereal will be the first to officially support Fischer Random Chess / Chess 960. Around one hundred thousand games have been played and shown no crashes, illegal moves, or other errors. I'm sure there are still bugs lurking, but they do not appear to be the type that would be visible in a game played by Ethereal. If anything catches your eye about FRC, please let me know, either through this forum, the github page, or using my email, andrew@grantnet.us
Additionally, I have gone through and rewritten or cleaned every single source file in the project. Occasionally I hear from other authors that they have learned from Ethereal, and taken things to improve their own engines. I love hearing this, so I'm making sure I do my best to provide a clean Ethereal for those to learn from.
Binaries for Windows {PEXT / POPCNT / NOPOPCNT} and Android {ARMV8 / ARMV7} can be found here.
Elo estimates are pending. I will post them as soon as they are complete.
I will be launching those tests on OpenBench, for anyone who cares for immediate results
A quick summary of changes, one patch at a time ...
A special thanks to Bojun Guo (noobpwnftw), for providing his machines to OpenBench, which is my Fishtest-like testing platform. His compute gives me the freedom to try ideas and concepts which would otherwise be untestable, or too time consuming to justify.Code: Select all
11.26 : Tune the evaluation using an updated sigmoid. The mistake in my calculation was pointed out by Tamas Kuzmics (Tomitank) 11.27 : Remove QS Futility Pruning, and merge it into SEE move picking 11.28 : Reset the Killer Moves for the children of a node, at each node 11.29 : Rewrite the internal way of saving History Scores (+Speedup) 11.30 : Move the selection of Killer and Counter moves to history.x 11.31 : Simplify Probcut Pruning by replacing the Verification with SEE 11.32 : Tweak the Razor, Futility, and SEE Pruning Margins 11.33 : Treat Root nodes like all others in regards to early pruning 11.34 : Cleanup and simplify Ethereal's search extensions 11.35 : Tweak the Late Move Pruning move counts 11.36 : Move the contents of castle.x into move.x (Preperation for FRC) 11.37 : Forgot to update the version number from V11.35 -> V11.36 11.38 : Limit the number of quiet moves tried when looking to disprove a singularity. Thanks to Raoni Campos (Pirarucu) for the idea :) 11.39 : Small code cleanup for search.c (+Speedup) 11.40 : Increase Late Move Reductions when evading check with our King 11.41 : Fix an oversight from V11.39 causing Illegal PVs to be reported 11.42 : Cleanup of attacks.x & bitboards.x 11.43 : Cleanup of move.x & movegen.x 11.44 : Cleanup of masks.x & movepicker.x & zobrist.x 11.45 : Cleanup of history.x & syzygy.x & thread.x & time.x 11.46 : Add support for FRC / Chess960 11.47 : Redefine PassedSafePromotionPath to require an empty pathway 11.48 : Cleanup of psqt.x & texel.x & types.x & uci.x & windows.x 11.49 : Following a NULL move, skip evaluateBoard() (+Speedup) 11.50 : Cleanup of board.x evaluate.x search.x transposition.x
A special thanks to Lucas Braesch (lucasart), for writing the base line code for FRC just over a year ago. I used his efforts as a very powerful starting point.
A special thanks to Raoni Campos and Tamas Kuzmics for their ideas that made it into Ethereal.
And, as always, thanks to all of you great folks here who play with Ethereal
Cheers from the Ethereal team,
Andrew Grant & Laldon