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Herlock Sholmes: Good one ! While one could argue that backgammon is a probability game anyway and that doubles introduce some "unsmoothness" to cope with, basically yes, they are just spices.
I would still say that in your game proposal the effect of a double sounds much more dramatic than a backgammon double - but since I am not playing any Dice Chess I could easily be wrong.
nabla:it's no more dramatic than Behemot chess or Atomic ... I suggested that in 10x10 version it would be played better, since we have 3 kings to be captured and the game won't end prematurely ... besides this, it gives the player more tactical options to move his/her pieces around the board ... Andy.
Herlock Sholmes:one more thing about Doubled Dice Chess for board 10x10 ... we increased the size of the board, trippled the number of Kings but the same, "middle age" weapon of capturing remained ... so, I Ithink, introducing doubled dice will balance somewhat the increased size and the number of kings with the chances of capturing them ... there are situations on 10x10 board that some kind of accelerator would be helpful ... please think about it ... and, of course, there is always more excitements when doubling of any kind is utilized ... Andy.