I found Interchange on the internet, and felt it deserved some enhancement.  This is a three deck extension.

This game is a three deck upgrade that is ballanced to intensify the difficulty.  A Napoleon varient, it has a special deal that alternates the cards dealt to the tableau.  This is probably the hardest of the Napoleons to win, but certainly frustrating because you can see those cards you can't quite get to without a bit of luck.