[Community Puzzle] Chess moves on FEN position

Someone else just hit this same problem, so I have modified Test 5 so that it now has another move after the pawn promotion, just so that it’s not a surprise in the Validator. Just an FYI.

  • danBhentschel

I’ve got an error with the validator 4. And and I don’t know why…
I thought it was because of the “en pensant” move, but i’m not sure, and I don’t find the problem.
Can you help me to finish this puzzle ?