Herlock Sholmes: let me explain my point more deeply ... there are known mistakes during opening phase of the game of chess. You can find literature on the subject. You can study. You can prepare yourself. You want to win 10 games challenge from your opponent. And the moment comes. Your opponent makes the first mistake  not being aware of it. You know that in 7 to 10 moves you will capture his/her Queen IF ONLY your opponent will add a little blunder to the game ... if he doesn't he still may recover, and despite of this you risk and double the game. You sent a signal to your opponent, hey fellow, you better start playing ... chances to recover after the fist mistake are very small and the excitement grows ... will he/she find the correct move to recover ? Chances are your opponent will accept the challenge (who resigns at the beginning ?) ... and you find yourself playing for 2 games, not one ... now, if he/she won't find the solution, you will end up with 2 win games. How about if the opponent recovers (you play with an inteligent fellow) or YOU MAKE a blunder ? game can easily by elevated to 4 games by redoubling .... doubling cube can be used in any phase of chess game, not even mention the long and complicated end games ... probably the most beatiful usage of doubling cube can be before you lanch a devastating combination attack in the middle game ... try to think about doubling cube in different games like halma, checkers, reversi or 5 in a row while playing these games ... you will be surprized how many doubling situations you will find ... try it ...

Do you see that using a doubling cube ONLY for "luck" games is a nonsens ... I gave you only a chess example, but you can use doubling privilage in any kind of game ... I think it's even more exctining in so called open games where not dice decide of the outcome of the game but our own, human blunders, sudden flash of fantastic idea etc .... and we all are part of this ups and downs of our minds ... doubling cube can be used to enhance out gaming pleasure.

Cheers ,

Andy.