A pitty if not was ment this double stones are dams and that the dams are just stones. I think you have to be exact.
But something else. Lose from the fact that checkers is for me very boring in comparison with chess I like to expres that I think the notation for checkers is very illogical this numering from the right corner with numbers till the end in the upper left corner.
Who did thinking out this? And therefore I think this would be far more logical.  A t/m E for the lines and then 1 t/m 10 for the rows. Because only the dark sqaures take part of the game two lines can count as one. Like this.
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Yeah... that for me is the difference... the variety of piece and the ways they move give Chess that extra character.Â