Cluster Counting | Mirrors Flashcards
1
Q
Basic Idea
A
Mirrors are another important counting tool. Any point on the board plus its mirror-opposite point equals 25. For example, the 5-point + 20-point, the 1-point + 24-point, and the 12-point + 13-point all total 25 pips. It follows that any cluster of 4 checkers in mirror positions total 50.
2
Q
A
Black: (20 + 5 = 25) × 2 = 50.
White: (13 + 12 = 25) × 2 = 50.
Black = 50. White = 50.
3
Q
A
Black: (23 + 2 = 25) + (24 + 1 = 25) = 50 .
White: (18 + 7 = 25) × 2 = 50.
Black = 50. White = 50.
