Combat is resolved same way as everything: roll 2d6+attribute. 6- miss/fail, 7-9 Partial Success, 10+ full success.
So, if you attack an enemy and get a 6-, you might receive damage, or be at his mercy, or in a hard position. 7-9 maybe you two trade blows and you deal and receive damage, or maybe you just deal half damage. 10+ you get what you wanted to do, if it was damage, deal it at no adverse consequence.