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Match Play. 0-0 to 7. How should Red play 53?
8/3, 6/3* wins fractionally more gammons but gives away too many losses to be correct. That move is overplaying the position.
The simple 13/10, 13/8 is correct. Any other move other than that is a blunder and 13/8, 6/3* enters the realm of the triple blunder. Red should simply be concentrating on extending his prime.