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