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Match Play. 0-0 to 5. How should Red play 33?
Given Red’s crunched board he cannot play this move passively.
He needs to create time to free his rear checkers.
21/15(2) is a reasonable play but still an error. Red must try to improve his board to create the required time. The only move to do that is the double tiger play, 21/18, 21/15, 8/5*.
Before the age of computers not one player in a thousand would have made that play. Nowadays at least a small percentage would understand the requirements of the position and make the right play. Such is progress.