playstrategy.org/QTvshEUc How is this possible?It's the same user.

It shouldn't be possible, thanks for bringing this to our attention!

playstrategy.org/XQ6WdMD3qYFF

I figured out how it works.

it's easy

@Vladimir, In some cases it is even possible to checkmate yourself! I can give a link to such game to you in PM

Ок давай.Наверное это за 1 ход позицию самогу создать где мат один ход.