I've worked out a solution.
As its 50% + 1 to count and we now have ( apparently ) 7 rounds, so its 3.5 + 1 =4.5 rounds to count. So you do 4 rounds, then do the first 2 and a 1/2 heats of the 5th round and your done !
No ? Ah well, i thought it sounded good
