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I would argue for a string option UCI_infos, with the empty string as default value. Ah right. Good idea! I was thinking of a way to set multiple values and that'd work perfectly, and yes, it's better than abusing bool. So: option name UCI_JSONInfo type string <empty> GUI: setoption name UCI_JSONIn...

Let me put it differently: with some more work (i.e. thinking about enable/disable info issue) it might be possible to specify a way to send more info inside UCI that could contain WDL and also serve as a well-designed vehicle for transmitting more information (which still has to be specified, becau...

Defining an extension won't help with the core problem: the goal of the protocol is to have engines and GUIs interoperate. So ideally, the things that are defined are useful across multiple engines, and the GUIs have some good way of representing them to the user. If something fits neither, it makes...

It appears the CPU machine that Ethereal was running on was affected by processes hanging around from an engine that previously run, and this game will be replayed.

I am curious why you use prefix UCI_ ? Does it mean standard? From the UCI spec: If the GUI get an unknown Option with the prefix "UCI_", it should just ignore it and not display it in the engine's options dialog. If the GUI doesn't know about the option, it won't be able to display the information...

Also, I believe that UCI doesn't send a game result/end game flag to the engine, so if you are doing any post-game processing, you have to infer when this occurs, rather than being told explicitly. Depending on the circumstances you can coax ucinewgame for this, or just detect when the current posi...

Someone pointed me a while ago (I forgot where, might've been TCEC chat) to this: https://github.com/DanielUranga/lc0/commit/4013c6042c6de540b07d31e840797f0df2f06db2 Which is allegedly how Fat Fritz does WDL reporting? I have no idea if this is accurate, but in general I feel it would be useful to s...

My argument is that I don't see the difference between basing a program on Alpha Zero and renaming it Leela Leela Zero was named "Leela" Zero because it was based on Leela's code. A program that already existed since ~2008. It used the method from the Alpha "Zero" paper and that's indeed where the ...

My first thought was that perhaps it is due to the training setup not having any way to arrive in these kind of "opening but immediately 2 knights down" situations, combined with a failure of the network to generalize. But it happens in middlegame positions too. [D}r1b2rk1/pp1nqppp/2p5/4p3/3P4/2R1P3...

The eval should be something like twice as bad when down two knights as when down one. The version I tested of your engine thinks it's actually better to be down two knights than one knight!! The raw eval in the starting position is allright (-1.6 vs -2.4). I wonder if it gets confused wrt developm...