The Rules
Full rules as per Battle Missions
200 pts of 0-1 Elites, 0-2 Troops, 0-1 Fast
Normal unit rules apply e.g. 1 Marine unit can have no more than 1 special weapon and 1 heavy weapon
No more than 1 model can be changed between games; any more constitutes a new list and therefore you move to the bottom of the ladder
The Ladder
Challenge up to 3 places above in the table
If lower player wins, they move 1 place ahead of higher player
If result is a draw, they move 1 place below higher player
If lower player loses, there is no change in position
This ensures the onus is on the higher placed player to win