• bugs?

 

I would like to give some feedback about ...

From: https://www.checkio.org/mission/shortest-knight-path/solve/

HTTP_USER_AGENT:

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0

my code seem run time error? but it's worked on my computer by use your test data

https://gist.github.com/Moony-Shiao/f455eec262e45b2baad5