Problem should begin with second move,because first black move 1...22x31 is forced.On the other side this puzzle is nice and hard!

Hehe, great you pointed this out @bonzai. I do this on purpose sometimes, to alternate a bit in the puzzles. It is also about the full-board awareness (a lot of beginners don't see quickly that they have to capture).

In puzzle 414 it is also interesting (for some I believe) to see what blunder white made. If you started with only the capture 36x27, you can't see the blunder move.