The middle one is a nice one. The other two aren't keepers.
The line is basically this:
If there's column doubling and the doubled area is at least as long as the distance from the hand to the foot, it's a keeper.
OR
If there's doubling in more than one spot (such as a column AND knees) then it's a keeper.
If you go into keeping everything that has ANY doubling on it, you would be keeping nearly half of the coins you look through.
The line is basically this:
If there's column doubling and the doubled area is at least as long as the distance from the hand to the foot, it's a keeper.
OR
If there's doubling in more than one spot (such as a column AND knees) then it's a keeper.
If you go into keeping everything that has ANY doubling on it, you would be keeping nearly half of the coins you look through.





















