Jaak:

It is possible to cross a location (not a piece) for more than twice. Only the next move can not be the reverse.

Coup Turc is interesting rule. I wondered the source of this rule. Because, as you have noted, in Turkish Checkers, you remove captured pieces as you capture, to be able to capture other pieces those are initially closed. And also to get rid of being captured twice and for simplicity as well.

Do yu know about the history about Coup Turc describing the origin?

Thanks