List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-ranked&page=2138
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "name": "13x13 Open D.E. Cup #82",
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                "username": "wiadp1",
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            "description": "Double-Elimination tournament for everyone. It will be started as soon as 8 players will join it.\n\nPrevious winners: https://online-go.com/group/12599",
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                "name": "GO Special Tournaments",
                "summary": "",
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            "started": "2025-11-19T07:12:13.882431Z",
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            "id": 138643,
            "name": "13x13 Mini League 10k-25k #56",
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                "id": 1688153,
                "username": "Mittelmark",
                "country": "de",
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                "id": 161,
                "name": "13x13",
                "summary": "Like to play on a 13 x 13 board?",
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            "id": 138850,
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            "name": "19 X 19 - 2025",
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            "description": "torneio 19 x 19 - 13 x 13",
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                "summary": "Grupo dos educadores da SME - DRE São Mateus , e interessados e amigos.\nSejam todos bem vindos e entrem em nosso grupo para organizarmos mais ações.\nhttps://chat.whatsapp.com/K2lPBye3iqRBOwJ2dU6sjW\n\ntorneios Mensais todo dia 30.",
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            "name": "Live 19x19 Swiss Tournament 2025-12-18 08:31",
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                "username": "matburt",
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                "next_run": "2026-04-18T08:00:00Z",
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        {
            "id": 138741,
            "name": "FNRRT: Round Robin for 13k-10k [FAST?] # III",
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        {
            "id": 426,
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        {
            "id": 425,
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                "name": "OGS Mini Tournaments",
                "summary": "The home for all of the old OGS mini tournaments",
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        {
            "id": 50,
            "name": "First 13 x 13 tournament!",
            "director": {
                "id": 299,
                "username": "topazg",
                "country": "gb",
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                "name": "OGS Mini Tournaments",
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