If you love order in your house, DON´T play this variant of timed Chess:
Choose a room in your house, and put the clock in a visible place. The
board is in another room, of course. Select who´s first throwing a coin.
In each turn, once you have made your move, go to the other room, click on
the clock once you have seen it, and HIDE it somewhere in the room. After
that, you can go to the room in which the game is being played. Don´t show
a big smile, psycological tactics are not good in this game.