nabla: 4

nabla: Or 1 if you mean checkers that he has to move out before moving anything else.

nabla: 4 checkers, of which 2 are race checkers and 2 "get-off-the-bar-first" checkers. It's easy to see, the race checkers are black with a tiny light edge, and the other checkers have tiny light edges and are black otherwise.

Looking once more at the move list I see that I was wrong. But I can't see anything by just looking at the images.

AbigailII, fakarten: Thank you for the help. By counting I found 2, but I am all but sure, and I can't see any difference in the images either.

nabla: black with a tiny light edge = tiny light edges and are black otherwise :)

Hrqls: Hehe well done Abigail :-)

"black with a tiny light edge", "tiny light edges and are black otherwise"

I'm really slow today.. He was just kidding. :)

nabla:never thought to look at the edges I always looked for the black hole in the middle to identify the race checkers. LOL