Connect four is a two player board game.

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

Given a complete connect-four board, determine who is the winner.

 User-1 is represented by 1

 User-2 is represented by 2

Winner is the one with the highest number of sets of 4 consecutive numbers. A set can be comprised of same numbers on row, column, diagonal or anti-diagonal basis.

 x=[2 2 1 1 2 1 2;
    1 2 2 1 1 1 1;
    1 2 1 1 2 2 2;
    2 1 2 2 2 1 1;
    1 1 2 1 2 1 1;
    2 1 1 2 2 2 1]

 here in the 5th column, we've a set of 2;

      in the 2nd row, we've a set of 1;

      in the 2nd anti-diagonal, we've a set of 1;

 so, 1 is the winner.

A tie is represented by 0.