List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=handicap&page=298
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "Organising arena-type handicap correspondence tournaments.",
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            "subsequent_pairing_method": "slaughter",
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            "exclusivity": "open",
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            "ended": "2025-12-02T15:42:14.138888Z",
            "start_waiting": "2025-07-14T19:45:58.580729Z",
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}