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Match Play. Red leads 12-11 to 13 (Crawford). How should Red play 53?
The key here is to keep the escape hatch of White’s bar-point. 18/15, 18/13 is too committal. The correct play is 13/10, 13/8. That also leaves one fewer shot than 18/15, 18/13 and in such situations every shot matters.
18/15, 18/13 is very nearly a blunder.