Basic golf rules: from the red line throw a nade to the hole marked with the same number, the grenade must explode inside, when you do a successfully shot go to the next hole, first player in finish the 8 holes in order will be the winner.
If you have the last patch use the command /racing for avoid blocks, if you don't have it you still can use the rope for "knock" your rival if he is blocking.
When the REAL TIME clock is showing 00:25 the game ends (but with same amount of turns for each player) and player more farthest will be the winner.
No draw option: if when clock is showing 00:25 both players are in the same spot, you must remember who was first in reach it (check the replay if is necesary) and this one will be the winner. (for exemple if when clock is showing 25 minutes both players are in hole 7, check who first made the hole 6 and this will be the winner).
About maps: for prevent cheap strategies (like players who host the same map the 4 rounds, or players who host a map what only he knew) MOD will say a link where you can download the map some minutes before of announce the pairings (obviously MOD won't play in the tourney).