List all tournaments or create a new tournament.

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HTTP 200 OK
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Vary: Accept

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            "name": "9x9 Mini League 1k-9k #148",
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            "description": "Special league for players between 9kyu and 1kyu. Tournament will be started as soon as 5 players will join it.\n\nPrevious winners: https://online-go.com/group/10842",
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                "id": 3524,
                "name": "9x9 Lovers",
                "summary": "A group for Go players who love the 9x9 board.",
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            "id": 33502,
            "name": "The Year of the Dog Tournament",
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                "username": "围棋哆啦A梦",
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            "description": "Have fun in the upcoming Lunar New Year-the Year of the Dog!\n\nUnfortunately, there's no handicaps this time. Let me know if you want to switch.",
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                "summary": "This is a group for people that likes Japanese animated cartoons and manga. All people are welcome! We will have small tournaments! Anyone can make the tournament in this group!",
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            "name": "19x19 New Zealand Open League #5",
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                "username": "dexonsmith",
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            "description": "All players welcome. 10 players. Starts only when full.\n\nNew Zealand rules. 19x19 board. Even games. Round robin.\n\nFor more tournaments and ladders with New Zealand rules: <https://online-go.com/group/14024>",
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                "id": 14024,
                "name": "New Zealand Ladders",
                "summary": "Group for ladders and tournaments that use New Zealand rules.",
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            "id": 48322,
            "name": "Fast Cor. 9x9 10player R-Robin. Starts when full. May-'19fC",
            "director": {
                "id": 497519,
                "username": "Kosh-retired",
                "country": "_Lord_Howe_Island",
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            "description": "---\n- STARTS WHEN FULL & Does NOT pause on the weekend.\n\n- Just one round. Ten players, nine games, Chinese Rules/Scoring.\n\n- If this suits you then, Bonne Partie. :)\n\n- This is a ‘Fast Correspondence Tournament’. Please, avoid delaying your games using the vacation feature or pause. If that’s the case, the tournament director may call the game(s) for your opponent (always with previous notice).",
            "schedule": null,
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            "tournament_type": "roundrobin",
            "handicap": 0,
            "rules": "chinese",
            "time_per_move": 45120,
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                "system": "fischer",
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                "time_control": "fischer",
                "initial_time": 172800,
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                "time_increment": 43200,
                "speed": "correspondence"
            },
            "is_open": true,
            "exclude_provisional": true,
            "group": {
                "id": 508,
                "name": "Fast Correspondence",
                "summary": "Tournaments for people who like to play quick correspondence games.",
                "require_invitation": false,
                "is_public": true,
                "admin_only_tournaments": false,
                "hide_details": false,
                "member_count": 822,
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            },
            "auto_start_on_max": true,
            "time_start": "2019-05-27T13:01:00Z",
            "players_start": 10,
            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
            "min_ranking": 5,
            "max_ranking": 38,
            "analysis_enabled": true,
            "exclusivity": "open",
            "started": "2019-05-26T20:26:51.120878Z",
            "ended": "2019-06-22T15:33:44.634577Z",
            "start_waiting": "2019-05-26T20:26:41.968262Z",
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            "ranked": true
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        {
            "id": 101833,
            "name": "2023.APR(1) 19X19 RoundRobin 17K~10K",
            "director": {
                "id": 1161013,
                "username": "朵兒普拉斯-doorplus-",
                "country": "_United_Nations",
                "icon": "https://user-uploads.online-go.com/7c935550f93ff5eb3f3e93239454342f-64.png",
                "ratings": {
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            "description": "Attention: Time Setting for the Game\n\nWhen playing the game, please pay close attention to the time setting. The game requires an average of 2-3 moves per day. If you need to take a break, make sure to return promptly and make more than 3 moves per day to keep up with the time. Please do not keep your opponent waiting for tooooooooooooooo loooooooooooooooooooong.                    \n\n🍭Tips:                                                       \n1️⃣Utilize the conditional move feature to speed up the game.                                                         \n2️⃣Disqualification will occur if a player loses by timeout.                                                         \n3️⃣If disqualified by the tournament director, all outstanding games will be forfeited, which will affect the player’s ranking.                                           \n\n🍭The following rules must be obeyed to guarantee a respectful game:                                                \n1️⃣No pauses are allowed.                                    \n2️⃣No vacation mode is permitted. (If a player is on vacation, they and their opponent can still make a move, but time will be suspended. Soooooooooooo, vacation mode is absolutely NOT allowed.)                                 \n3️⃣Any player who is on vacation or has paused the game will be disqualified without further notice or reminder.  \n4️⃣If you find that a player pauses the game or enters vacation mode, please send a message to the tournament director.                                                      \n\nLet us strive to be respectful players.                        \nWe wish everyone a pleasant game and hope to gain something from our opponents. :)",
            "schedule": null,
            "title": null,
            "tournament_type": "roundrobin",
            "handicap": 0,
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            "is_open": true,
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            "group": {
                "id": 12824,
                "name": "Way to GO",
                "summary": "",
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            "time_start": "2023-04-10T16:00:00Z",
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        {
            "id": 82660,
            "name": "13x13 D.E. 11/20/2021 🦎",
            "director": {
                "id": 584481,
                "username": "Mulsiphix",
                "country": "us",
                "icon": "https://user-uploads.online-go.com/f79dd274bd83ca6fdf5e2c1af119ba63-64.png",
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                "professional": false,
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            },
            "description": "☆ The default tournament pairing method is Strength, to ensure matches remain competitive the entire contest.\n\n☆ This is a ‘Humdrum Correspondence Tournament’. Please, avoid delaying your games using the vacation feature or pause. If that’s the case, the tournament director may call the game for your opponent (always with previous notice).\n\n☆ Does NOT pause on the weekend.\n\n☆ If this sounds like a good time to you, please join us!\n\n<hr>\n\nTournaments are a great way to locate players who are more competitive than your average opponent. A big part of improving your own skills is to have them tested by capable challengers. If you would like to be a part of more New Zealand rule set tournaments, check out our group for weekly opportunities.",
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            "title": null,
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            },
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                "id": 3207,
                "name": "New Zealand Tournaments",
                "summary": "This group exists as a place to enjoy weekly tournaments with competitively minded players using the lesser known but arguably strategically superior New Zealand rule set. All are welcome here ヽ(≧◡≦)ノ",
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        {
            "id": 9610,
            "name": "Sunjang Baduk Tournament 4th Season (Group B4)",
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                "username": "Leira",
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            "description": "## <i class=\"fontnova-turtle\"></i> Correspondence Sunjang Baduk Tournament\n### Season 4 - Group B4\n\n###**Read the description below.** \n- ####You have **7 days** to join your round-robin after receiving the invitation\n- ####<font color=\"red\">**SPECIAL OPENING RULES:**</font> ([See description][Correspondence Tournament])\n\n&ensp;&ensp; ![Opening Rule][sunjang opening]\n___ \n###  **Title Holder:** <font color=\"gold\">**🏆**</font> [illluck] <font color=\"gold\">**🏆**</font> \n\n<table border='2'>\n  <tr>\n    <th colspan=\"9\"><i class=\"fontnova-turtle\"></i> [Correspondence \nTournament]</th>\n  </tr>\n  <tr>\n    <th width=\"70\" rowspan=\"3\">Season</td>\n    <th width=\"90\" rowspan=\"3\"><font \ncolor=\"Gold\">Champion<br>🏆</font></td>\n    <th width=\"90\" rowspan=\"3\"><font \ncolor=\"silver\">Runner-up<br>🏆</font></td>\n    <th width=\"90\" rowspan=\"3\"><font color=#CD7F32> 3rd \nPlace<br>🏆</font></td>\n    <th colspan=\"5\">Groups / Rounds</td>\n  </tr>\n  <tr>\n    <th width=\"45\" rowspan=\"2\">*Final*</td>\n    <th colspan=\"4\">Divisions</td>\n  </tr>\n  <tr>\n    <th width=\"60\" colspan=\"2\">*A*</td>\n    <th width=\"30\">*B*</td>\n    <th width=\"30\">*C*</td>\n  </tr>\n  <tr>\n    <td>2011</td>\n    <td>[vitality]</td>\n    <td>[Uberdude]</td>\n    <td>[illluck]</td>\n    <td>-</td>\n    <td>[A](https://online-go.com/tournament/1533)</td>\n    <td>-</td>\n    <td>[B](https://online-go.com/tournament/1532)</td>\n    <td>-</td>\n  </tr>\n  <tr>\n    <td>2012</td>\n    <td>[illluck]</td>\n    <td>[fengitreon]</td>\n    <td>[MatCauthon]</td>\n    <td>-</td>\n    <td>[A](https://online-go.com/tournament/1975)</td>\n    <td>-</td>\n    <td>[B](https://online-go.com/tournament/1976)</td>\n    <td>-</td>\n  </tr>\n  <tr>\n    <td>2013-14</td>\n    <td>[illluck]</td>\n    <td>[ZyBeX86]</td>\n    <td>[kavias]</td>\n    <td>[🏆](https://online-go.com/tournament/2984)</td>\n    <td>[A1](https://online-go.com/tournament/2709)</td>\n    <td>[A2](https://online-go.com/tournament/2711)</td>\n    <td>[B](https://online-go.com/tournament/2712)</td>\n    <td>[C](https://online-go.com/tournament/2713)</td>\n  </tr>\n</table>\n___\n###**Format:** League\n\n###The Divisions:\n- Hierarchical structure, labeled ***A***, ***B***, ***C***, \n***D***, etc.\n- Assorted in groups. Top division has two (**A1**, **A2**)\n- Players of similar strength\n\n###The Groups:\n- 5 to 9 players (ideally 7)\n- Seeded by strength (<i class=\"fa\">&#xf10c;</i> overall rank) \n- Compete in a *Simultaneous Round-robin*\n\n###The Final Round: 3 players\n- Qualify: the winners of **A1** and **A2**, and the *Title \nHolder*.\n- Merit based tie-break (good title defense, good performance in \nprevious round)\n- A third player<sup>1</sup> may be drawn if needed\n\n### The games:\n- Fischer Timing, 3 days on the initial timer and 1 day increment \nper move (capped at 7 days). No weekend stop\n- No handicap, 6.5 komi. **Sunjang Baduk** starting position\n- Korean rules\n- **Conditional moves** enabled\n\n###Promotions & Demotions:\n- Best player<sup>1</sup> per Group promotes one division up\n- Worst 3 players<sup>1</sup> per Division demote one division down\n- Dropped and disqualified players reapply as new players\n- Promotions based on rank may be awarded to fill available space \n(both new and old players apply, even if demoted).\n___\n\n####Notes\n<sup>1</sup>Best and worst players are determined first by Scored \nPoints, then the Sum of defeated opponent's scores (SODOS) and \nlastly by <i class=\"fa\">&#xf10c;</i> overall rank.\n\nFor more details you may visit the [Sensei's pages][Correspondence \nTournament].\n\n[fengitreon]: https://online-go.com/user/view/11442/fengitreon\n[illluck]: https://online-go.com/user/view/8913/illluck\n[kavias]: https://online-go.com/user/view/4048\n[MatCauthon]: https://online-go.com/user/view/5832/MatCauthon\n[vitality]: https://online-go.com/user/view/35184/vitality\n[Uberdude]: https://online-go.com/user/view/8592/Uberdude\n[ZyBeX86]: https://online-go.com/user/view/52701\n\n[group]: https://online-go.com/group/142\n[sunjang opening]: http://i.imgur.com/vdZ0oLB.png?1\n[Correspondence Tournament]: http://senseis.xmp.net/?SunjangBadukTournamentAtOGS",
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                "require_invitation": false,
                "is_public": true,
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            "started": "2024-05-25T03:43:58.730265Z",
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        {
            "id": 61010,
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            "description": "A tournament for players trying to work their way up the kyu grades. 22-16 kyu. Have fun.",
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                "id": 43,
                "name": "Kyu Level Study Group",
                "summary": "A group for kyu level players! Join, play tournaments, and have fun. Thanks for being a part of our community!",
                "require_invitation": false,
                "is_public": true,
                "admin_only_tournaments": false,
                "hide_details": false,
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            "analysis_enabled": false,
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            "started": "2020-05-26T14:21:14.374486Z",
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}