Game of Fifteen Board Initialization Attempt

void init(void)
{
    int init_value = (d * d) - 1;
    int empty_tile = 0;
    for (int i = 0; i < d; i++)
    {
        for (int j = 0; j < d; j++)
        {
            init_value--;
            board[i][j] = init_value;
        }
    }
    board[d - 1][d - 1] = empty_tile;
    if (d % 2 == 0)
    {
        board[d - 2][d - 2] = 2;
        board[d - 3][d - 3] = 1;
    }
}