Classic Ara stops working after a few moves and needs re-opening in Chessbase 16

[magicianfromriga]

Hi Johannes!
First of all, fantastic work with Classic Ara so far! It is a really interesting engine to analyse and spar with, and I hope it soon enters the TCEC Premier Division!

I am facing an issue when I use it on Chessbase 16 - after making a few moves, Classic Ara stops functioning i.e. it doesn't show any lines. However, when I stop the engine, unload it and reload it, it works fine. What is causing this issue and how do I fix this?

Another thing I wanted to ask was this - does Classic Ara support the Multi-PV functionality? Does it not lose strength with it like Leela and Komodo MCTS?

Thank you for your time!
magicianofriga

[QueensGambit]

Hello @MagicianofRiga ,
thanks for letting me know. This problem could be related to #81.
I haven't tried ClassicAra in combination with Chessbase yet, but I heard it should work with Arena and I can confirm that it runs also on CuteChess.

Another thing I wanted to ask was this - does Classic Ara support the Multi-PV functionality? Does it not lose strength with it like Leela and Komodo MCTS?

Yes, MultiPV is available for ClassicAra.
It can be enable e.g. via:

setoption name MultiPV value 5

I have not yet run any tournaments on how MultiPV affects playing strength.
On my machine, the number of nodes per second decreases by 1 - 2% when Multi-PV of 5 is active.

[QueensGambit]

It could be that this issue is also resolved now thanks to #167.

[magicianfromriga]

I will check this out with the latest version and close the issue if it is resolved.

[g3rfx]

I have the same issue with version 0.9.9. This happens if I move quickly back and forth between the moves of a game.

[QueensGambit]

@g3rfx Thank you for the confirmation! 👍