XGID=-a--B-D-BC-abB--babbbb--B-:1:1:1:54:0:0:3:0:10
Money Play. How should Red play 54?
Red can take the passive approach of playing safely with 13/9, 13/8 but things will have to go very well for him to win after that move. He wins only about 16% of the time.
The alternative is to try to create a counter-prime with 9/5, 6/1*. This is very bold but wins another 6% of the time. It also loses about 11% more gammons.
If White held the cube the passive play would be correct but holding the cube Red can engineer positions where he can make effective use of the cube. This makes enough of a difference that 9/5, 6/1* is the correct move and the passive play is a small error.