Tuesday: If you have pond games you won't be able to finish them, since you won't be able to move. Other than that you get to keep everything (multiple tournaments and stairs, more than 20 games, etc).
Only when you try to start a game, pawn's restrictions are verified and you won't be able to start any more until you go under 20 games again, nor enter any more tournaments until you're eliminated in all your current ones.