List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-min_ranking&page=638
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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    "previous": "https://online-go.com/api/v1/tournaments/?format=api&ordering=-min_ranking&page=637",
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            "name": "Giải đấu Xóm Cờ Vây: Hệ Măng Non!!!",
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                "id": 1358858,
                "username": "piii7777",
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            "title": null,
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                "period_time": 30,
                "periods": 5
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            "exclude_provisional": true,
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                "id": 13517,
                "name": "Xóm Cờ Vây",
                "summary": "Xóm Cờ Vây là một cộng đồng chơi cờ vây trực tuyến của các kỳ thủ cờ vây Việt Nam, do kỳ thủ Vương Đánh Cờ Vây thành lập, nhằm giúp đỡ những người muốn học chơi cờ vây ở Việt Nam.",
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            "description": "Hi All, \nI thought to myself, a small private tournament now between the years couldn't hurt and could still be quite fun.\nI invite nice players with whom I have played and who are of similar rank.\nThe game is played in three rounds without \"slaughter\".\nAttention: Time to draw a stone: max. 1 day and no break on the weekend. So that it doesn't go on forever.\nI'm looking forward to your feedback - this is the first tournament I have created.\nHave fun!\nCedeng",
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                "name": "Deutsche Gruppe",
                "summary": "Die Gruppe für alle Deutschsprachigen.",
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            "name": "Bergedorf spielt 9x9 die dritte",
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                "username": "richyfourtytwo",
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            "description": "Viel Spaß!",
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                "username": "hengsh",
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                "ui_class": ""
            },
            "description": ":) :) :)",
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            "title": null,
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                "id": 1593,
                "name": "Googo",
                "summary": "The perfect group for beginners",
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        {
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            "name": "ลองระบบ3",
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                "username": "Fuyumi",
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                "professional": false,
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            "description": "ลองระบบ3",
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                "time_control": "absolute",
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            "exclude_provisional": false,
            "group": {
                "id": 10060,
                "name": "MUGO ชมรมหมากล้อมมหาวิทยาลัยมหิดล",
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            "subsequent_pairing_method": "slaughter",
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            "name": "ระดับชั้น ปวช.3 กระดาน 19x19",
            "director": {
                "id": 1010331,
                "username": "PomSii",
                "country": "th",
                "icon": "https://secure.gravatar.com/avatar/aa13948ef4fee733d9d956be746af4af?s=64&d=retro",
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                "name": "PAT GO Club",
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            "ranked": true
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                "name": "GO Special Tournaments",
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                "summary": "A group for Go players who love the 9x9 board.",
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                "name": "9x9 Lovers",
                "summary": "A group for Go players who love the 9x9 board.",
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            "subsequent_pairing_method": "slaughter",
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