http://www.thebluealliance.com/match/2016pncmp_f1m1
Although there were only two robots on the field for blue, I think this match simulates a situation where an alliance (blue) either decides not to send a defending robot back for whatever reason, or is unable to send one back. The alliance (red) that is able to pick up a solid defending robot that is not going to be vital for scoring efforts is the alliance that will win their division and ultimately Einstein field.
For example, the alliance we ended up on at district champs consisted of three scoring robots, two of which had never played defense (1318 and 3663) and were both playing key roles in the scoring effort, and one of which (5803) had been playing defense on and off and lowgoaling all season long, but was necessary for scoring efforts but even more necessary for defense interference in the enemies courtyard. Although our alliance had more scoring potential than any other alliance on the field, we could not afford to keep 5803 on defense in our own courtyard for the entire match, as part of our later strategy called for them playing counter defense. Because of this, the enemies courtyard ended up too crowded for three robots to score against a defending robot, and the other alliance had a nice, clear courtyard to score in. The triple cycler strategy really only works if the teams have had ample practice staying out of each other's way.