2010-08-31 Match Play/Answer

Red to play 42


 Analysis by David Rockwell



Train your eye to see your potential six primes.  In this position, the bar point can never be a part of a six prime with the one point.  Spreading your builders with 13-9, 13-11* leaves eight outfield shots, only two more than making the bar with 13-11*, 11-7.  Since the value of the bar point is low, it is better to spread the builders and try to make another inner board point.



If you slide the ace point back to the deuce point, making the bar would be correct.  Spreading the builders now leaves an extra four shots.  And, if white enteres on the ace, the bar is a part of a broken four prime.