Lc0 Question

Werewolf · Post by **Werewolf** » Thu Aug 06, 2020 5:59 pm

Please could you tell me whether this statement is true or false:

"For Lc0 to analyse any position well it needs a move history of at least one ply. So if you have a position in mind you should set up the board one ply earlier."

True or false?

zullil · Post by **zullil** » Thu Aug 06, 2020 6:04 pm

Werewolf wrote: ↑Thu Aug 06, 2020 5:59 pm Please could you tell me whether this statement is true or false:

"For Lc0 to analyse any position well it needs a move history of at least one ply. So if you have a position in mind you should set up the board one ply earlier."

True or false?

False in that generality. Lc0 analyzes startpos quite well, for example.

MOBMAT · Post by **MOBMAT** » Thu Aug 06, 2020 8:04 pm

It would still need a correct FEN in order to know the castling permissions, the EP square, and the half-move count.

Ovyron · Post by **Ovyron** » Fri Aug 07, 2020 8:38 am

A more interesting question is if Lc0 will analyze a position with a history *better*.

Werewolf · Post by **Werewolf** » Fri Aug 07, 2020 9:58 am

Ovyron wrote: ↑Fri Aug 07, 2020 8:38 am A more interesting question is if Lc0 will analyze a position with a history *better*.

Yes, this was what I was trying to ask

smatovic · Post by **smatovic** » Fri Aug 07, 2020 10:40 am

This was at least true for the past, you had to feed LC0 with the move history, not sure when and how they changed it.

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Srdja

jp · Post by jp » Fri Aug 07, 2020 12:01 pm

Werewolf wrote: ↑Thu Aug 06, 2020 5:59 pm "For Lc0 to analyse any position well it needs a move history of at least one ply. So if you have a position in mind you should set up the board one ply earlier."

True or false?

The claim that a few plies of move history were needed was certainly made on the Leela blog, which is supposed to be semi-official, in the past.

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