XGID=--aB--CbC-D-bC---aabb-b-b-:0:0:1:55:0:0:3:0:10
Unlimited Games. How should Red play 55?
Ahead in the Race, Red should race.
Which is the most difficult point for him to clear? The mid-point. Therefore, he should clear that point now with 13/8(2), 13/3. This plays well to the theory of connectivity.
So much so that any other move is a blunder.