LC0 as an IDeA engine

Werewolf · Post by **Werewolf** » Thu Jul 26, 2018 1:04 pm

LC0 (Big Net in case you were wondering) works fine in Aquarium as an analysis engine, but not as an IDeA engine. It just doesn't start.

Does anyone know why and if something can be done to change it?

yanquis1972 · Post by **yanquis1972** » Thu Jul 26, 2018 4:07 pm

maybe idea is coded to the CPU? only reason i can think of if it works in the GUI

Werewolf · Post by **Werewolf** » Thu Jul 26, 2018 11:19 pm

I think it must be to do with the way the engine and the GUI communicate. Perhaps an IDeA engine needs to send / receive an extra instruction to start?

MikeB · Post by **MikeB** » Fri Jul 27, 2018 6:07 am

Werewolf wrote: ↑Thu Jul 26, 2018 1:04 pm LC0 (Big Net in case you were wondering) works fine in Aquarium as an analysis engine, but not as an IDeA engine. It just doesn't start.

Does anyone know why and if something can be done to change it?

I have heard in some setups, picochess comes to mind, that the weights file must be placed in the directory as the GUI ( or pseudo GUI in the case of picochess). Not sure if that's the fix for you or not.

Werewolf · Post by **Werewolf** » Fri Jul 27, 2018 7:16 am

The engine works fine in this GUI (Aquarium, Sandbox) so there’s nothing exceptional about the way it works, but for some reason it just doesn’t get started in IDeA.

Maybe there’s some kind of timeout issue perhaps.

Marek Soszynski · Post by **Marek Soszynski** » Fri Jul 27, 2018 9:00 am

For IDeA to build its tree properly, the engine used must support "Exclude Move".

Werewolf · Post by **Werewolf** » Fri Jul 27, 2018 9:14 am

Marek Soszynski wrote: ↑Fri Jul 27, 2018 9:00 am For IDeA to build its tree properly, the engine used must support "Exclude Move".

Thank you.

For now then there's no way of using LC0 I think.

Hai · Post by **Hai** » Sat Jul 28, 2018 4:27 pm

You should write to the developers to implement “exclude move” option.
They can do it after the “ponder on” option is ready.

Werewolf · Post by **Werewolf** » Sat Jul 28, 2018 5:11 pm

Hai wrote: ↑Sat Jul 28, 2018 4:27 pm You should write to the developers to implement “exclude move” option.
They can do it after the “ponder on” option is ready.

Do you have a contact email? I've looked on their pages but can't see an obvious one

crem · Post by **crem** » Sat Jul 28, 2018 10:35 pm

Werewolf wrote: ↑Sat Jul 28, 2018 5:11 pm
Do you have a contact email? I've looked on their pages but can't see an obvious one

The best is to open an issue on github here: https://github.com/LeelaChessZero/lc0/issues
And possibly ping SashaMN directly, who implemented similar functionality (searchmoves) here: https://github.com/LeelaChessZero/lc0/pull/40

LC0 as an IDeA engine

LC0 as an IDeA engine

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