Six-primes are the ultimate containment formation in backgammon, but even a six-prime is no guarantee of winning. Here’s a couple of problems illustrating the strengths and weaknesses of six-point primes.

(a) Black on roll, money game, White owns the cube.

White – Pips 118 (-19)

Black – Pips 137 (+19)
Black to Play 6-4
 

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