There's a standard match play index that most courses have adopted. It goes (in order from the first hole) 18, 8, 12, 3, 14, 6, 10, 1, 16, 5, 11, 2, 15, 7, 13, 4, 17, 9. The idea is to spread strokes given evenly. There are still courses that use their Stableford index as the Match Play index, so this will be specific to the course.