squeak, one for one is not correct for Risk. If you assume a 3 vs 2 roll, there are 7,776 possible roll combinations. 2,890 have the attacker winning twice (37.2%). 2,275 have the defender winning twice (29.3%). 2,611 have each winning once (33.6%). As you can see, the attacker in a 3 vs. 2 roll has the advantage. If the same number of dice are being rolled, the defender has an advantage. Therefore, one eliminates one is not a good idea.
