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P U problem

Posted By: David Presser
Date: Monday, 19 May 2014, at 5:13 a.m.

In Response To: P U problem (Nack Ballard)

It is funny that you are posting this position because recently I re-read your book and one sentence that keeps nagging me refers to this position indirectly. The discussion is in the context of 32S-31P-31 (A155) and I quote: "If White's offense in A155 were strengthened by playing a 5 from her midpoint to her 8pt (giving her nine checkers in the zone), Black's anchoring as in A157 would be barely correct."

As much as this book is profound and accurate, I am not sure that I agree with this specific principle. 9 checkers in the opponent's zone will not stop me from making the 5. Make it 10 in the zone and I will consider the alternatives as in this case.

As for this specific case, I see it in the following way: with 4 checkers on my 8 point the thematic play should be to make the 5. However, because of the 10 in the zone problem and extremely well diversified checkers for the opponent (moving a spare from the 6 to the 5 makes a huge difference in terms of equity) this could be an exception in which anchoring is right. I have no idea which play is right but my decision OTB would be to make the 5 (when in doubt...). If the opponent's blot was moved one pip forward (from his 11 to his 10), I would be more inclined to anchor.

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