According to the wikipedia

Chebyshev and Chessboard distance are the same thing

But when i test both, i get different results

How come?

https://en.wikipedia.org/wiki/Chebyshev_distance

http://accord-framework.net/docs/html/M_Accord_Math_Distance_Chessboard.htm

http://accord-framework.net/docs/html/M_Accord_Math_Distance_Chebyshev.htm