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Money Play. How should Red play 42?
Which blocking point should Red make? Normally it is correct to block your opponent’s sixes and that is the case here. The four should be played 13/9.
Despite the lack of duplication, it is correct to step up with the two, 24/22.
Over the board 13/9, 7/5 was tried but Red needs to try for more. The game is in the balance and he needs his checkers working.
Any play other than 24/22, 13/9 is at least an error.