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Not unless you want a King capture on the first move. My variant restricts the swapping to the centre of the board. First move King captures are possible in my game (1/108), but not as likely as when played with 8-sided dice.

You can make the possiblity even zero by playing it with Omega Chess / Grand Chess / etc.

This game might be a good learning tool for children. You can make it more strategic by using a four-sided die.

But you might use eight-sided dice with a 10x10 field. Else you'd need to start the count one rank/file inward.

Here's a thought. Use a four-sided die for ranks and an eight-sided die for files. This would only swap pieces on the same side. You can have an additional King safety rule, such that no King may be placed in check by the role of the dice. It could work in one of two ways. (1) The dice are rolled over until the resulting swap will not put a King in check, or (2) the results of the dice are ignored when the swap would put a King in check.

Well, Fergus, I go for the natural approach. I play Double Chess, not Marseillais, if you understand.

No, John, I don't understand your comment at all.

What I meant was that I don't make artificial things like checkmate have precedence over King capture. In Marsellais Chess, your turn ends when you check.