Herlock Sholmes: Just because you can think of a few positions where you would like to use a doubling cube doesn't imply it makes sense to have a doubling cube. Having a doubling cube means the cube can be used at any time, not just in the positions of Alekhine games.

If it would be my doubling game scenerio I would offer doubling cube to my opponent after discovering a brilliant combination and he would most likely accept it ... is it so hard to imagine that I would double my score ?

Ah, so, your strategy is "if I double, I've discovered a brilliant move". That would only make your opponent look harder. He's then more likely to find the combination as well, and either refuses the double if he believes the combination to be winning, or taking it if he thinks he can refute the combination.

And those who played with him were top players, not brainking masters ... and he wouldn't offer doubling cube after the first move since he also was beaten by others. So, your argument about automaticaly doubling after the first move has no place here ...

Ah, and since BK is populated by Alekhines and players who have beaten him, your arguments do hold?

You may call me an engineer, but I try to see what the effect is of introducing a new rule. And the situation is that BK isn't a closed tournament whose organizing committee invited a group of closed matched players. Player strength varies on BK. There are many games between players of different strength. In tournaments, you don't get to pick your opponent.