Private lots

It turned out that some of the world's best Othello players don't want to come play unless there is a way to play completely privately - so that no one can play through the game after the game.

So I made a general solution (also valid for chess and checkers).
If you make a game where spectators are prohibited, no one will see the game afterwards (only the players can see it).

Additionally, I plan to make all invisible tournament games private soon.