Check your probabilities.
all possible combinations of 3 dice is 6^3 = 216.
all possible combinations of 2 dice is 6^2 = 36.
all combinations of the two = 6^3 * 6^2 = 7776.
Of those,
attacker lose 0 defender lose 2 = 2890 or about 37%.
attacker lose 1 defender lose 1 = 2611 or about 34%.
attacker ...
