Thx a lot!!!

it's more interesting to read 9 lines instead of one, isn't it?

ranks cannot be changed

Good advice.Thanks.

Thanks, those are great points. I've modified the description to (hopefully) be more concise and clearer about input/output/etc.

Massively helpful

Description says that fractions should not be rounded, but truncated.

Shouldn't morality of the story be: don't post issues too fast?-)

I tried your solution many times in a row and it passes all the tests so how do you explain that the test you gave is wrong? BTW before posting issues please notice how many people passed the kata: 295 in C#; if there were errors - and that can happen - do you think that nobody would have said long before you?-)

What language?

Please avoid posting spoilers, or mark your posts as such.

HugeRandomTests
  Log
    Knight: 0, Pawn: 4179603166410694144, Initial distance: 4179603166410694144
    Knight: 0, Pawn: 562349794280586304, Initial distance: 562349794280586304
    Knight: 0, Pawn: 213589157521237088, Initial distance: 213589157521237088
    Knight: 1, Pawn: 1956404320598300416, Initial distance: 1956404320598300415
    ...snip 200 test cases...

Your solution is too slow and uses too much memory.