You can also use %3 to evaluate the game for a win state from a given move. For example to detect the diagonal leftBottom - rightTop win state given some new mo

You can also use %3 to evaluate the game for a win state from a given move. For example to detect the diagonal leftBottom - rightTop win state given some new move (row, col) it looks something like: int player = grid[row][col]; if (row == (col+ col +2)%3){ if (grid[(row+1)%3][(col+2)%3] == player && grid[(row+2)%3][(col+1)%3]==player){ return true; } }