List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=485
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "summary": "A group for Go players who love the 9x9 board.",
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            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 15,
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            "analysis_enabled": true,
            "exclusivity": "open",
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            "ended": "2026-03-18T02:23:11.565807Z",
            "start_waiting": "2026-01-31T17:53:33.026474Z",
            "board_size": 9,
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}