All checkers games I ever played started with a long negotiation about the rules...

Exactly. I was surprised that this one doesn't support multi capture when available.

It does. Don’t forget, only a king can go backwards.

Was curious about this, so checked:

> In American checkers, men can jump only forwards; in international draughts and Russian draughts, men can jump both forwards and backwards. [0]

[0]: https://en.wikipedia.org/wiki/Checkers

Moreover a king in Russian draughts can travel an arbitrary number of squares.

a King? in checkers? we call the game "Dame" (as in Dame Judy Dench) and the piece transforms into said Dame with "the usual" super powers. Which are different from the King's. Of course. :-)

But how many squares can they travel?

Only one, American checkers' kings are so uncool.

It does, not sure what you're seeing. Maybe the second jump was in the reverse direction, and thus not legal?

It forces multi capture when available.

Does it not?

I believe I referenced https://wcdf.net/rules.htm for rules. I had these questions myself when writing the game. Updated the README to link to the intended rules.

I guess I have too? So has everyone I’ve ever played with.

There’s a lot of different checkers variants.