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Money Play. How should Red play 63?
24/21, 13/7 leaves White three blots to attack which is too many, given the strength of White’s home board.
A better game plan for Red is to strengthen his own home board before trying to release the rear checkers.
The correct move is, therefore, 13/7, 8/5.
I was surprised that 24/21, 13/7 is a 1.5 blunder but once you look at the two possible positions then you begin to understand why.