Don Colton's Risk Dice Roller

(Risk is a trademark of Parker Bros / Hasbro for their board game.)
Wikipedia Article, Attacking

How many attacking armies
How many defending armies
How many skirmishes (max)

Skirmish 1   2 1 6   5 6 attacker loses X, defender loses X
Skirmish 2   3 6 2   5 5 attacker loses X, defender loses X
Skirmish 3   2 5 3   3 1 attacker loses X, defender loses X
Skirmish 4   5 5 5   6 4 attacker loses X, defender loses X