Cruiser in the upper left corner are in contact with submarine.

Try to change order of operations. Worked for me.

Really nice. I want to see more kata like this one. I can only imagine the feelings of those who didn't come up with easy solution, although there were several hints like "think more", 8 rank and that vast list of cases. This kata is not just a task - it contains a lesson from which you can actually learn something. Or, you may choose to complain, but if so, then ask yourself - are you a codewarrior or a codewhiner?

This kata is pure gold. Thanks a lot!