Search found 41 matches

by Fabian Fichter
Wed Jan 08, 2020 9:32 pm
Forum: Computer Chess Club: General Topics
Topic: The Stockfish of shogi
Replies: 18
Views: 1525

Re: The Stockfish of shogi

In Fairy-Stockfish the base piece values are the same for all variants, they are only adjusted for a few rules that can heavily influence dynamics like losing chess rules, piece drops, and board size (for sliders). E.g., for drop games, the piece values are scaled by a v_max/(v_max+v) formula, wher...
by Fabian Fichter
Wed Jan 08, 2020 12:52 pm
Forum: Computer Chess Club: General Topics
Topic: The Stockfish of shogi
Replies: 18
Views: 1525

Re: The Stockfish of shogi

In Fairy-Stockfish the base piece values are the same for all variants, they are only adjusted for a few rules that can heavily influence dynamics like losing chess rules, piece drops, and board size (for sliders). E.g., for drop games, the piece values are scaled by a v_max/(v_max+v) formula, where...
by Fabian Fichter
Tue Jan 07, 2020 11:37 pm
Forum: Computer Chess Club: General Topics
Topic: The Stockfish of shogi
Replies: 18
Views: 1525

Re: The Stockfish of shogi

Yes, that was a bit of an overstatement, I meant that the terms are the same, while the piece values (apart from rook and bishop) and a few other things of course differ. However, the evaluation function is quite generic, i.e., it chooses/modifies the evaluation terms based on the rules/features of ...
by Fabian Fichter
Tue Jan 07, 2020 8:58 pm
Forum: Computer Chess Club: General Topics
Topic: The Stockfish of shogi
Replies: 18
Views: 1525

Re: The Stockfish of shogi

Actually many of the top shogi engines are very similar and based on Stockfish (Dolphin, YaneuraOu, Apery, ...), but their strength comes from the evaluation files they use. The evaluation files are no (deep) neural networks but as far as I know just some coefficients for low-order polynomials of pi...
by Fabian Fichter
Mon Dec 09, 2019 6:38 pm
Forum: Computer Chess Club: General Topics
Topic: best server for computers to play variants currently?
Replies: 25
Views: 2402

Re: best server for computers to play variants currently?

The problem with S-Chess for lichess is not the lack of popularity, but that it uses fairy pieces and gating of pieces which both do not exist on lichess yet, so it would perhaps require more work than other lichess variants. I think in hindsight they would not add racing kings again, but it can not...
by Fabian Fichter
Tue Nov 19, 2019 12:33 pm
Forum: Computer Chess Club: General Topics
Topic: Fairy-Stockfish 10.3 released
Replies: 40
Views: 3252

Fairy-Stockfish 10.4 released

Although the last release was only one month ago, I decided to make a new release due to two major new features, namely Xiangqi and CECP/XBoard protocol support. Fairy-Stockfish can now be used without UCI2WB adapter in WinBoard/XBoard. https://github.com/ianfab/Fairy-Stockfish/releases/tag/fairy_sf...
by Fabian Fichter
Sat Oct 26, 2019 2:21 pm
Forum: Computer Chess Club: General Topics
Topic: Fairy-Stockfish 10.3 released
Replies: 40
Views: 3252

Re: Fairy-Stockfish 10.3 released

...... Fairy Stockfish largeboard 10.3 works now on Winboard with HGM's modification but there is another problem now. Fairy Stockfish largeboard 10.3 lost on time in a 5'+3"(5 minutes+3 seconds/move) game. In fact it didn't obey the time control at all! It was a Capablanca random Chess game with a...
by Fabian Fichter
Fri Oct 25, 2019 8:28 pm
Forum: Computer Chess Club: General Topics
Topic: Fairy-Stockfish 10.3 released
Replies: 40
Views: 3252

Re: Fairy-Stockfish 10.3 released

It seems that WinBoard crashes, which almost by definition is a WinBoard bug. String handling in WinBoard unfortunately is not very robust; it mostly doesn't test for buffer overrun, and just relies on all text buffers being large enough. (Currently set to 512 bytes through the macro MSG_SIZ.) Perh...
by Fabian Fichter
Fri Oct 25, 2019 7:45 pm
Forum: Computer Chess Club: General Topics
Topic: Fairy-Stockfish 10.3 released
Replies: 40
Views: 3252

Re: Fairy-Stockfish 10.3 released

It is strange that it prints "variants="normal,xiangqi"" in the first line. This should not happen and might potentially cause the problems. In any case, I now uploaded a new version of the UCI2WB adapter: https://github.com/ianfab/uci2wb/releases/tag/v10.3. With this it still crashes in Winboard. ...
by Fabian Fichter
Fri Oct 25, 2019 12:29 pm
Forum: Computer Chess Club: General Topics
Topic: Fairy-Stockfish 10.3 released
Replies: 40
Views: 3252

Re: Fairy-Stockfish 10.3 released

Can you please try to get the command "C:\Program Files (x86)\WinBoard-AA\WinBoard\WinBoard\UCI2WB.exe 'C:\Program Files (x86)\WinBoard-AA\WinBoard\WinBoard\Stockfish\fairy-stockfish-largeboard_x86-64-modern103.exe" to work on the command line (e.g., some quoting might be missing). It should stay o...