List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-board_size&page=3256
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                    "maximum_players": 40
                },
                "next_run": "2026-05-20T19:00:00Z",
                "base_points": "10.0"
            },
            "title": null,
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                "time_control": "byoyomi",
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            "is_open": true,
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            "ranked": true
        },
        {
            "id": 16236,
            "name": "Dojo Challenge",
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                "id": 51534,
                "username": "surema",
                "country": "un",
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            },
            "description": "Let's have some fun.\n\nThe tournament is open to everyone, but it should be considered more of a friendly learning experience than a competition. Though these are not mutually exclusive, of course. \n\nHandicap is automatic, because the goal is to give everyone a fighting chance. Please make sure at the beginning of the game that the handicap is somewhat appropriate (I think it only takes correspondence rank into account). If it is not, the advantaged player is invited to pass as many times as necessary to establish balance. \n\nSince this is a learning group, reviews are encouraged.\n\nHave fun!",
            "schedule": null,
            "title": null,
            "tournament_type": "s_mcmahon",
            "handicap": -1,
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            "time_per_move": 89280,
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                "max_time": 604800,
                "time_increment": 86400
            },
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            "exclude_provisional": false,
            "group": {
                "id": 1001,
                "name": "Surema's study group",
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                "require_invitation": false,
                "is_public": true,
                "admin_only_tournaments": false,
                "hide_details": false,
                "member_count": 39,
                "icon": "https://cdn.online-go.com/5.1/img/default-group-v5.svg"
            },
            "auto_start_on_max": true,
            "time_start": "2016-04-06T21:24:00Z",
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            "subsequent_pairing_method": "slaughter",
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            "analysis_enabled": true,
            "exclusivity": "open",
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            "ended": "2016-09-11T05:53:54.887644Z",
            "start_waiting": "2016-04-06T21:24:44.791594Z",
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            "player_count": 25,
            "ranked": true
        },
        {
            "id": 131198,
            "name": "Correspondence 13x13 RoundRobin 2025-08-08 19:00",
            "director": {
                "id": 4,
                "username": "matburt",
                "country": "us",
                "icon": "https://secure.gravatar.com/avatar/a87ff679a2f3e71d9181a67b7542122c?s=64&d=retro",
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                },
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                "professional": false,
                "ui_class": "supporter moderator admin"
            },
            "description": "Automatic Site-wide Tournament",
            "schedule": {
                "id": 7,
                "name": "Correspondence 13x13 RoundRobin",
                "rrule": "DTSTART:20260519T190000Z\nRRULE:FREQ=DAILY;INTERVAL=3",
                "active": true,
                "created": "2015-02-20T06:00:14.582400Z",
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                "lead_time_seconds": 86400,
                "tournament_type": "roundrobin",
                "handicap": 0,
                "rules": "japanese",
                "size": 13,
                "time_control_parameters": {
                    "time_control": "fischer",
                    "initial_time": 259200,
                    "pause_on_weekends": true,
                    "max_time": 259200,
                    "time_increment": 86400
                },
                "min_ranking": 0,
                "max_ranking": 36,
                "analysis_enabled": true,
                "exclude_provisional": true,
                "players_start": 4,
                "first_pairing_method": "slaughter",
                "subsequent_pairing_method": "slaughter",
                "settings": {
                    "num_rounds": "3",
                    "upper_bar": "20",
                    "lower_bar": "10",
                    "group_size": "3",
                    "maximum_players": 10
                },
                "next_run": "2026-05-22T19:00:00Z",
                "base_points": "10.0"
            },
            "title": null,
            "tournament_type": "roundrobin",
            "handicap": 0,
            "rules": "japanese",
            "time_per_move": 90782,
            "time_control_parameters": {
                "time_control": "fischer",
                "initial_time": 259200,
                "pause_on_weekends": true,
                "max_time": 259200,
                "time_increment": 86400
            },
            "is_open": true,
            "exclude_provisional": true,
            "group": null,
            "auto_start_on_max": false,
            "time_start": "2025-08-08T19:00:52.595535Z",
            "players_start": 4,
            "first_pairing_method": "slaughter",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 0,
            "max_ranking": 36,
            "analysis_enabled": true,
            "exclusivity": "open",
            "started": "2025-08-08T19:00:52.900223Z",
            "ended": "2025-09-09T17:47:56.796292Z",
            "start_waiting": "2025-08-08T19:00:52.774655Z",
            "board_size": 13,
            "active_round": null,
            "icon": "https://cdn.online-go.com/5.1/img/trophies/gold_title_13.png",
            "player_count": 5,
            "ranked": true
        }
    ]
}