Cash game. Center cube. Black on move.

Part (A): Black to play 6-2.

Part (B): Black to play 5-4.

In both positions, White’s game suffers from a serious flaw: the big stack of checkers on the 20-point. Stacks are always bad, but in the late middle game they become even worse because so many checkers are tied up in one section of the board. As a rule, repairing the problem by moving the checkers off the stack becomes a very high priority, often outweighing all other considerations.

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