List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-board_size&page=813
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "title": null,
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            "group": {
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                "name": "PlanetGo",
                "summary": "PlanetGo",
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                "is_public": true,
                "admin_only_tournaments": true,
                "hide_details": false,
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            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": false,
            "exclusivity": "open",
            "started": "2025-09-01T08:32:39.929247Z",
            "ended": null,
            "start_waiting": "2025-09-01T08:31:16.403642Z",
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}