There are twenty short bottles or buoys on the field, 8 on each side of the bridge and four on top of it. Standing buoys in the scoring zone are worth 10 points, laying down buoys with the white tip touching the zone are worth 2 points. Under the bridge is 30 ping pong balls or ‘rocks’. At the end of the field are ‘trenches’ (not built but seen as the white strip of paper) have 2" high walls and can have the balls scored in them for 1 point each. At the end of the match, each robot that touches inside the yellow square on top of the bridge results in 5 points for each drive wheel touching it. The bridge is a total of 8 inches high and the hight under the bridge is 4 inches, almost as tall as the buoys.
I’ll give more detail if you want.