Ko error

[janos-r]

Hi there,
thank you for your great library. I was just using it in my rust yew project.
I just stumbled upon a situation. Just in some shapes, I get this situation, where after taking 2 stones, the API thinks that it is a ko, even though it's not.
In the screenshot, the transparent stone is the about to be placed stone, that is returning an error.
Would be great if you could have a look at it.
Thank you for your great library!

ps: I have this frontend in: https://github.com/janos-r/yewban

[janos-r]

More pure reproduction:
These lines don't throw an error:

    game.try_play(Move::Play(0, 2)).unwrap();
    game.try_play(Move::Play(0, 1)).unwrap();
    game.try_play(Move::Play(0, 3)).unwrap();
    game.try_play(Move::Play(1, 2)).unwrap();
    game.try_play(Move::Play(1, 4)).unwrap();
    game.try_play(Move::Play(1, 3)).unwrap();
    game.try_play(Move::Play(0, 5)).unwrap();
//    game.try_play(Move::Play(2, 4)).unwrap();
//    game.try_play(Move::Play(2, 5)).unwrap();
    game.try_play(Move::Play(0, 4)).unwrap();
    game.try_play(Move::Play(0, 3)).unwrap();
    game.display_goban();

but if you uncomment the two moves, so that the capture also puts another stone in atari, the last move can't be taken back.

[Sagebati]

Hi, thanks for the report I'm looking into it. What are the rules used ? and version of the crate ?
ps: Awesome project

[Sagebati]

I corrected the issue, 0.16.0 is now yanked. the others versions don't seems to hove this issue. It was an issue in detecting the Ko point I forget to add a condition from a rework I had done for 0.16.0. I added you reproduction into my tests !