Beware of the full prime

Match Play. Blue trails 1-2 to 5. How should Blue play 43?
eXtreme Gammon ID: XGID=--BBBbBCB----B---abbbbbb--:1:-1:1:43:1:2:0:5:10

Answer and Commentary

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We have seen this type of problem before, and the technique required is interesting.

Red leads in the race so should be running for home. Red should also take note of the blots in White

This turned out be closer than I thought. Red must split the back checkers while White only has nine checkers in the zone. The only two sensible contenders are 24/16 and 24/22, 13/7.