But you won, didn't you? (I was a bit disappointed about your match against Switzerland, admittedly. I expected more.)

Winning is not important, it's the difference between a real game and the internet that concerns me when it comes to undo. In real life I just adjust the stone, on the internet neither player can do this - even if they both want to. It also happened in Czechia-France where they replayed the entire game up to that point in order to get around the problem. This is a nonesense.