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Description
From the marketplace listing
Nadirball is a daily football (soccer) trivia grid in ChatGPT, in English and Turkish: name players who played for both clubs, from the Süper Lig, Premier League and Bundesliga. Every day everyone gets the same 3x3 grid: three clubs or nations across the top and three down the side. Each square needs a footballer who played for both its row and its column, at any point in his career.
Tap a square and pick a player from the list, or just tell ChatGPT, for example "Podolski for Galatasaray and Arsenal". Turkish letters and accents are optional. You have 9 guesses a day.
Every correct answer gets a rarity: the share of that day's players who picked the same footballer for that square. The lower your total, the better. When you finish, Nadirball shows the most picked and the rarest answers for every square, and you can share your result as coloured squares that spoil nothing. Your streak grows each day you play.
Answers are checked against club histories from Wikidata, including every past club and loan spell. If a correct answer is rejected, report it from the grid: a person checks it, and if you were right your guess turns correct.
Limits:
- One grid a day for everyone. A new grid starts at midnight Türkiye time (21:00 UTC).
- Clubs from the Süper Lig, Premier League and Bundesliga, plus some nations. No other leagues yet.
- No accounts: Nadirball keeps your guesses and streak under ChatGPT's anonymous user ID. Say "Delete my Nadirball data" to delete them.
- ChatGPT never receives a square's answers while you can still play it.
- Not affiliated with any club, league or federation.
Language: English · Automatically detected from descriptions.
Metadata · Oct 31, 2026 · 06:10 UTC · Compared with Oct 28, 2026 · 13:13 UTC
WHAT CHANGED
Declared capabilities changed
Long description — Now says: (soccer) trivia grid in ChatGPT, in English and Turkish: name players who played for both clubs, from the Süper Lig, Premier League and Bundesliga. Every day...
Observed in instructions or declared skills. Runtime behavior has not been tested.
grid. Every day everyone gets the same 3x3 grid: three clubs or nations across the top and three down the side, from the Süper Lig, the Premier League and the Bundesliga.
After
Oct 31, 2026 · 06:10 UTC
(soccer) trivia grid in ChatGPT, in English and Turkish: name players who played for both clubs, from the Süper Lig, Premier League and Bundesliga. Every day everyone gets the same 3x3 grid: three clubs or nations across the top and thre...
Declared skills
Before
Oct 28, 2026 · 13:13 UTC
[]
After
Oct 31, 2026 · 06:10 UTC
[{"description":"Play today's Nadirball football grid. Use when the user wants a football or soccer trivia grid or quiz, futbol grid'i, or to name players who played for two clubs.","interface":{"brand_color":null,"default_prompt":"Let's...
---
name: football-grid
description: Play today's Nadirball football grid. Use when the user wants a football or soccer trivia grid or quiz, futbol grid'i, or to name players who played for two clubs.
---
Use this skill when the user wants to play today's Nadirball grid: a daily 3x3 football (soccer) trivia grid, also called football tic-tac-toe (in Turkish futbol grid'i or futbol XOX), where each square needs a player who played for both its row club and its column club, or for a club and a nation. The user's explicit instructions always come first.
## Flow
1. `show_daily_grid` opens today's grid in a card: three row headers and three column headers (clubs from the Süper Lig, Premier League and Bundesliga, sometimes a nation), the user's answers so far, guesses left and the rarity score. Everyone gets the same grid, and a new one starts at midnight Türkiye time (21:00 UTC).
2. The game is about recalling players unaided, so results for an open grid contain no answers, only the headers and the user's own picks.
3. When the user names a player for a square, `submit_answer` takes the row and column (1-3) and the name as the user gave it, and checks it against Wikidata club histories, where every past club and loan spell counts. An answer counts once `submit_answer` has checked it. Accents and Turkish letters are optional.
4. A correct answer scores the share of today's players who picked the same name for that square, so lower is better; an empty square counts 100. There are 9 guesses a day.
5. When the user is done, `finish_grid` ends today's game; its result lists each square's possible answers, most picked answers and rarest pick. `show_grid_results` shows them for a finished or closed grid.
6. `get_my_stats` shows the streak and recent scores, and `create_share_link` makes a link to the user's board that names no players while the grid is open.
## Scope
- Nadirball is one shared daily grid. General football questions, live scores and custom quizzes are outside it, and ChatGPT answers those itself.
- Each result ends with a short summary suitable to show the user; the card shows the full grid.
- `delete_my_data` deletes the user's boards, streak and share links when they ask for it.
Referenced files: 1 — file references are metadata, not package contents.
Release notes
1.0.1: listing update. English and Turkish search keywords (football trivia, soccer quiz, football tic tac toe, futbol xox, futbol bilgi yarışması and more), a description that opens with what the game is, and a football-grid skill. The show_daily_grid description and the server instructions now name the game as a football (soccer) trivia grid, also called football tic-tac-toe or futbol grid'i. The game, its tools and their inputs are unchanged.
Declared in the saved package. Remote tools may change independently.
Package details
Publisher declarations from the archived package. These are separate from our research and the live service's terms.
