Unlimited Games. How should Red play 54?
6/1, 5/1 by Red gives White running, priming and blitzing game plans.
24/15 seeks to get into a race/holding game where there is still a lot of contact. Of course, White’s 15 hits are annoying but Red will then have more contact from wherever he enters.
24/15 is right by a long way. All other moves are blunders because they incur too much risk. 24/15 wins about a third of the time which is the best Red can do. In addition, all other plays have a much higher gammon risk than 24/15.
It may seem counter-intuitive to run but here it is correct.