Teams rank the 12 available maps (below) in order from most favored to least favored.
Each choice carries a weight: +13 for 1st choice, +10 for 2nd, +8 for 3rd, +6 for 4th, +4 for 5th, +1 for 6th, -1 for 7th, -4 for 8th, -6 for 9th, -8 for 10th, -10 for 11th, and -13 for last.
At the beginning of each round, the weightings for all the maps of both teams are tallied, and the map with the highest "score" is played. In the case of a tie, a coin will be flipped, a die will be rolled, or a random number generator be used by a head referee to decide the map (whichever is more suiting).