I found a way to play without komi

[antonTobi]

One way to prevent mirroring is to play on two boards of different sizes, like here:

Playing on the union of two boards

Would someone like to try a game on two boards at once? [image] This is a very natural variant to try (actually not really a variant at all, just regular go on a different type of board). It’s important that the two boards are of different sizes, otherwise the second player could always mirror the moves on the opposite board (there are of course other ways to counteract this too; starting from a nonsymmetrical position, letting the stronger player take white and reverse komi, etc. But I find …

I don’t think that fair komi for this setup is necessarily 0, but maybe it’s closer to zero than on the regular board? (The same could be said for the union of two boards of the same size, even though fair komi is 0 with mirroring, once you enforce that white is not allowed to mirror I would expect that black still has a small advantage!)