To clarify on the jumping distance... for athletics checks to jump:
Non-running start: Your check / 10, rounded down, is your jump distance (so a 0-9 is 0 squares, 10-19 is 1, 20-29 is 2, 30-39 is 3, etc)
Running jump: Your check / 5, rounded down, is your jump distance (so 0-4 is 0 squares, 5-9...