|
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The positions above (collectively referred to as "A pretty pair" are side by side (maximize your screen width for best viewing). The left-hand (first) position is "A pretty one" (a copy of the rollout posted by Pierrez). The right-hand position is "Another pretty one" (rollout by me).
In the left-hand (first) position, Blue has an extra spare on the 6pt. In the right-hand (second) position, it is borne off. Why does that single-checker alteration change the best play?
The two positions after three key aces (5/3* 1/off) have been played are shown below, again side by side. Only one ace remains to be played.
In either position, if you play 6/5, White will leave a double blot (which Blue will be shooting at, from the roof) with 5 numbers: 11 31 32. If, on the other hand, you play the clever shift of 4/3, White will leave a double blot on 7 numbers: 11 21 41 42.
6/5 (as opposed to 4/3) gives you compensations for having 2 fewer root numbers: (a) You will have a better prime in front of Opp in more variations, and (b) After 6/5, she cannot escape with 33, whereas after 4/3 she can escape with 44.
The above is true in both positions, but 6/5 is more helpful to your distribution in the left (third) diagram than in the right (fourth) diagram. That distributional difference is enough to tip the scales.
Nack
|
| ||||||||||||||||||||||||
