{
    "event": "Game with variations and sub-variations",
    "mainVariation": {
        "comment": "I'm the main variation header comment.",
        "nodes": [
            "e4",
            {
                "notation": "e5",
                "variations": [
                    [ "c6" ],
                    [
                        "c5",
                        {
                            "notation": "Nc3",
                            "variations": [
                                [ "Nf3", "d6" ]
                            ]
                        }
                    ]
                ]
            },
            {
                "notation": "Nf3",
                "variations": [
                    []
                ]
            },
            "Nc6",
            {
                "notation": "Bc4",
                "variations": [
                    [
                        "Bb5",
                        {
                            "notation": "a6",
                            "variations": [
                                [ "Nf6" ]
                            ]
                        },
                        {
                            "notation": "Ba4",
                            "variations": [
                                [ "Bxc6", "dxc6" ]
                            ]
                        }
                    ]
                ]
            }
        ]
    }
}