Nibbler and Stockfish

[fohristiwhirl]

For those who are interested, Nibbler (really an Lc0 GUI) now more-or-less supports Stockfish (and, presumably, similar A/B engines), using a low MultiPV setting to give something of a similar flavour of experience.

While Nibbler has a number of attractive features, in certain ways it remains a rather casual GUI, not really suitable for mega-serious grandmaster types. But many have found its on-board display, winrate-instead-of-cp, and searchmoves functionality useful.

* https://github.com/fohristiwhirl/nibbler
* https://github.com/fohristiwhirl/nibbler/releases

[Ferdy]

For those who are interested, Nibbler (really an Lc0 GUI) now more-or-less supports Stockfish (and, presumably, similar A/B engines), using a low MultiPV setting to give something of a similar flavour of experience.

While Nibbler has a number of attractive features, in certain ways it remains a rather casual GUI, not really suitable for mega-serious grandmaster types. But many have found its on-board display, winrate-instead-of-cp, and searchmoves functionality useful.

* https://github.com/fohristiwhirl/nibbler
* https://github.com/fohristiwhirl/nibbler/releases

Tried it with my A/B engine Deuterium and according to the log nibbler is sending:

Code: Select all

--> setoption name UCI_Chess960 value true

which Deuterium does not support.

When I press File->New game, it will then send:

Code: Select all

--> ucinewgame
--> position fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w AHah - 0 1

Note on the castling right.

Is there a way to disable the Chess960 in nibbler 1.7.4?

I see there are new versions, I will try it too.
Same behavior, it is sending a chess960 fen, this is from 1.7.6.

Code: Select all

--> position fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w AHah - 0 1

[fohristiwhirl]

That's true, I wanted to allow Chess960 and it was simpler just to put everything into Chess960 mode all the time.

Nibbler should (I hope) tolerate the engine sending castling moves in standard format, so if you want to make the engine work, the easiest thing would be to adjust the incoming Chess960 castling rights string...

• A becomes Q
• H becomes K
• a becomes q
• h becomes k

Sorry about that!

[Ras]

so if you want to make the engine work, the easiest thing would be to adjust the incoming Chess960 castling rights string...

However, the right thing would be to fix Nibbler's broken UCI implementation. If the engine doesn't announce UCI_Chess960, it is not Chess 960 capable.

[fohristiwhirl]

Yeah, fair.

I'm too lazy to do this properly right now but I'll try and have an option to suppress Chess960 output within an hour.

[fohristiwhirl]

Alright uploading v1.7.8 now, it is of course not adequately tested but it should be OK. The option is in the Dev menu.

By the way my initial advice on how to make the engine work was wrong anyway, I'd forgotten that I'd also be sending moves in a format the engine won't understand. The switch in v1.7.8 fixes that too.

[Ferdy]

Alright uploading v1.7.8 now, it is of course not adequately tested but it should be OK. The option is in the Dev menu.

By the way my initial advice on how to make the engine work was wrong anyway, I'd forgotten that I'd also be sending moves in a format the engine won't understand. The switch in v1.7.8 fixes that too.

1.7.9 still sends the wrong format.

Code: Select all

position fen rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w AHah - 0 1

But in the GUI the fen displayed is correct.

[fohristiwhirl]

1.7.9 still sends the wrong format.

Confirm you enabled the menu option, Dev --> Suppress Chess 960 format?

I realise this isn't the best, it was a quick hack to make it work.

[Ferdy]

1.7.9 still sends the wrong format.

Confirm you enabled the menu option, Dev --> Suppress Chess 960 format?

I realise this isn't the best, it was a quick hack to make it work.

Very good now it works.

[Ferdy]

One suggestion, after sending all the setoptions to the engine, could you send also the isready? Then wait for the engine's readyok before resuming nibbler's next tasks.