List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-ranked&page=5888
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 58873,
    "next": null,
    "previous": "https://online-go.com/api/v1/tournaments/?format=api&ordering=-ranked&page=5887",
    "results": [
        {
            "id": 136583,
            "name": "class tournament",
            "director": {
                "id": 1942246,
                "username": "Rosemary Teacher",
                "country": "un",
                "icon": "https://secure.gravatar.com/avatar/066f8b0bfc551845f905ae10d94383da?s=64&d=retro",
                "ratings": {
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                        "deviation": 250,
                        "volatility": 0.06
                    }
                },
                "ranking": 7.000000000000001,
                "professional": false,
                "ui_class": "provisional"
            },
            "description": "jia you jia you!",
            "schedule": null,
            "title": null,
            "tournament_type": "swiss",
            "handicap": 0,
            "rules": "japanese",
            "time_per_move": 88451,
            "time_control_parameters": {
                "system": "fischer",
                "time_control": "fischer",
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                "pause_on_weekends": true,
                "time_increment": 86400,
                "initial_time": 259200,
                "max_time": 604800
            },
            "is_open": true,
            "exclude_provisional": false,
            "group": {
                "id": 16110,
                "name": "Chinese game Class",
                "summary": "",
                "require_invitation": false,
                "is_public": false,
                "admin_only_tournaments": true,
                "hide_details": false,
                "member_count": 10,
                "icon": "https://cdn.online-go.com/5.1/img/default-group-v5.svg"
            },
            "auto_start_on_max": false,
            "time_start": "2026-01-21T15:18:00Z",
            "players_start": 2,
            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": true,
            "exclusivity": "group",
            "started": "2026-01-21T15:19:28.861609Z",
            "ended": "2026-01-22T15:00:06.558585Z",
            "start_waiting": "2026-01-21T15:19:28.794451Z",
            "board_size": 19,
            "active_round": null,
            "icon": "https://cdn.online-go.com/5.1/img/default-group-v5.svg",
            "player_count": 3,
            "ranked": false
        },
        {
            "id": 136206,
            "name": "9x9 tournament",
            "director": {
                "id": 1067981,
                "username": "Averyw123",
                "country": "nz",
                "icon": "https://user-uploads.online-go.com/f887017259dd7746e20627b59b0c7968-64.png",
                "ratings": {
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                    "overall": {
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                        "volatility": 0.06010299986513658
                    }
                },
                "ranking": 20.534738366137827,
                "professional": false,
                "ui_class": "supporter"
            },
            "description": "9x9 tournament",
            "schedule": null,
            "title": null,
            "tournament_type": "mcmahon",
            "handicap": 0,
            "rules": "japanese",
            "time_per_move": 95543,
            "time_control_parameters": {
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                "time_control": "fischer",
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                "pause_on_weekends": true,
                "time_increment": 86400,
                "initial_time": 259200,
                "max_time": 604800
            },
            "is_open": true,
            "exclude_provisional": false,
            "group": {
                "id": 10855,
                "name": "⚫️The Brilliant World Of OGS⚪️",
                "summary": "Are you an OGS fan? If you are, join this group where there’s great tournaments and games to be played.\n\nPeople and bots can chat and play in this group. This is a public group so all are welcome to join.",
                "require_invitation": false,
                "is_public": true,
                "admin_only_tournaments": false,
                "hide_details": false,
                "member_count": 190,
                "icon": "https://user-uploads.online-go.com/0e618bdf660c5ca247f547082c39f943-64.png"
            },
            "auto_start_on_max": false,
            "time_start": "2026-04-30T23:00:00Z",
            "players_start": 4,
            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": true,
            "exclusivity": "open",
            "started": null,
            "ended": null,
            "start_waiting": null,
            "board_size": 9,
            "active_round": null,
            "icon": "https://user-uploads.online-go.com/0e618bdf660c5ca247f547082c39f943-15.png",
            "player_count": 5,
            "ranked": false
        },
        {
            "id": 135750,
            "name": "Tournament404",
            "director": {
                "id": 1926369,
                "username": "kyliewee02",
                "country": "un",
                "icon": "https://user-uploads.online-go.com/ca62c83151453f1e19f9b6e5f28f3f48-64.png",
                "ratings": {
                    "version": 5,
                    "overall": {
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                        "volatility": 0.06000133866351721
                    }
                },
                "ranking": 7.337528416040835,
                "professional": false,
                "ui_class": "provisional"
            },
            "description": "Just a simple tournament (I'm not so good though). Join and have fun!",
            "schedule": null,
            "title": null,
            "tournament_type": "roundrobin",
            "handicap": 0,
            "rules": "japanese",
            "time_per_move": 259200,
            "time_control_parameters": {
                "system": "simple",
                "time_control": "simple",
                "speed": "correspondence",
                "pause_on_weekends": true,
                "per_move": 259200
            },
            "is_open": true,
            "exclude_provisional": false,
            "group": {
                "id": 16022,
                "name": "ChatRoom404",
                "summary": "This is just a group. Do whatever you like here! It is also alright if you want to just join this group and chat. ~Destroyer802 😝",
                "require_invitation": false,
                "is_public": true,
                "admin_only_tournaments": false,
                "hide_details": false,
                "member_count": 19,
                "icon": "https://user-uploads.online-go.com/8b1bbf17216ac7c771cfc31ad15f297a-64.png"
            },
            "auto_start_on_max": false,
            "time_start": "2025-12-27T01:00:00Z",
            "players_start": 2,
            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": true,
            "exclusivity": "group",
            "started": "2025-12-27T01:22:11.561329Z",
            "ended": "2026-01-02T00:25:33.601036Z",
            "start_waiting": "2025-12-27T01:22:11.494019Z",
            "board_size": 19,
            "active_round": null,
            "icon": "https://user-uploads.online-go.com/8b1bbf17216ac7c771cfc31ad15f297a-15.png",
            "player_count": 2,
            "ranked": false
        }
    ]
}