XGID=--BB-bD-B---aB--bbccB-bA--:1:1:1:53:4:1:0:5:10
Match Play. Red leads 4-1 (post-Crawford). How should Red play 53?
For money the correct play would be 20/12* but at this match score that is just asking to be gammoned.
Either 23/20, 6/1 or 23/15 is OK. According to the rollouts the former is marginally better but it is very close.