This is clearly not a double when playing an unlimited game, but what about in match play? See if you can figure out how you would play at all the scores from 5a-5a to 2a-3a.

Whites winning Chances = 57.2%

No Double : Unlimited, 5a-5a, 4a-5a, 3a-5a, 3a-4a, 2a-3a, 2a-4a, 2a-5a

Double/Take: 5a-4a, 4a-4a, 5a-3a, 4a-3a, 3a-3a, 7a-5a

You can see the pattern emerging. When you have a small advantage and lead the score or are at 5a-5a it is not a double. When you are even or behind in the score you double. Of course your opponent has an easy take.