coan.net: very good point as well. Based on your question as well as playbunny's comments, it seems my most recent scenario that I posted does not qualify for the rule in question.
Pedro Martínez: Again, it is the interpretation of the rule. I have one checker that was able to pass her prime (6 consecutive pieces) and has moved as far as possible, to the "1" on the bottom of the board. All other checkers are stacked on the 2... there are no possible moves to make at this point.
I think what you are getting at is that one checker was allowed to move as far as possible so now it is ok to block the rest, because the rule does not state "collected all [REMAINING] checkers..." so this is where different interpretations come into play.
Well, it happened again. I politely wrote and pasted the rule, but I guess she didn't understand me and wrote back to me in Czech (which I don't understand) and didn't comply with the rule.