Play all three FootyFox games in one sitting and you will notice something subtle. The Champions League game gives you five clue columns. The Premier League and La Liga games give you six. And the Team column, which looks identical everywhere, is quietly playing by different rules in each.
This is not an accident and it is not decoration. It is the game adapting to the shape of each competition. Here is the full explainer, so the next yellow cell you see actually tells you what it is trying to say.
What stays the same in every league?
Four clues never change. Age goes green on an exact match and yellow when your guess is within 2 years of the mystery player. Country goes green for the same nationality and yellow for the same continent. Position goes green for an exact match and yellow for an adjacent role on the GK-DEF-MID-FWD ladder, so a defender guess lights up yellow against both goalkeepers and midfielders. Shirt number goes green on the money and yellow within 4.
Those four are the universal grammar of the game. If you have read our five clues guide, you already know how to chain them together. The divergence is all in the club.
How does the team clue work in the Champions League?
In the Champions League game, a yellow Team cell means your guessed player's club plays in the same domestic league as the mystery player's club. Guess a Bayern player and see yellow, and you have learned the answer plays in Germany, without knowing the club.
That rule exists because of what the Champions League is. Our dataset spans 1,248 players across 36 clubs from 16 different countries. Domestic league is the single most informative grouping available: England leads with 222 players in the pool, Spain has 197, Germany 118, Italy 116, and the Netherlands and France sit at 101 and 100. A yellow team clue can, in one cell, collapse a 1,248-player haystack down to one country's worth of squads.
So in the UCL, treat the team clue as a country detector. Opening with a player from a league you suspect, an English club say, is effectively asking, "is the answer Premier League based?" That is a big, cheap question.
What changes in the Premier League and La Liga?
Everything about the club column, in two ways.
First, the yellow rule changes meaning. In a single-country league, "same domestic league" would always be true and the clue would be dead weight. So the Premier League and La Liga games switch to regions: a yellow Team cell means the two clubs share a geographic region. Guess an Arsenal player, get yellow, and the mystery player belongs to one of London's seven clubs.
Second, you get a sixth column: Region. Unlike every other clue, Region has no yellow state. It is exact or nothing. It exists to name the area once you have found it, and to punish lazy assumptions the rest of the time.
The regions are real groupings, not decoration. The Premier League splits into six: London, North West, Midlands, South Coast, Yorkshire, and North East. La Liga also splits into six: Catalonia, Madrid, Andalusia, Valencia, Basque & Navarra, and Northwest & Islands. We have written a full primer for each map, one for English football's geography and one for Spain's regions, because knowing which clubs share a region is exactly the kind of knowledge that converts a yellow cell into a next guess.
Does the country clue change too?
The rule stays identical, same nationality green, same continent yellow, but its value swings wildly between games. Our La Liga dataset is 64.2 percent Spanish, so a Spanish green there barely narrows the field, while the Premier League is only 36.9 percent English, making nationality a genuinely sharp tool. In the Champions League, with 80 nationalities in the pool, even a continent-level yellow carves real chunks off the candidate list. Same grammar, different exchange rates.
Why does this change your strategy?
Because the same color means a different size of discovery in each game.
A yellow team clue in the Champions League narrows you to a country, which can still leave a hundred or more candidates. It is a directional clue, strong but broad. A yellow team clue in the Premier League narrows you to at most seven clubs, and in some regions far fewer. Yellow on a Leeds guess is impossible, for instance, because Leeds United is Yorkshire's only top-flight club: the region clue there is green or dead.
That asymmetry should shape your opening guess. In the UCL, open with a player whose league membership tests your leading theory. In the Premier League and La Liga, a first guess from a big multi-club region, London or Madrid, buys the most information per guess, a principle our first guess strategy piece covers in depth.
Which version is hardest?
Pool size says the Champions League: 1,248 players against 618 in the Premier League game and 698 in La Liga. More candidates, more obscure squad players, more ways to be wrong.
But the single-league games bite differently. Their pools are smaller and more familiar, so the game balances that with the exact-only Region column and tighter club geography. Knowing that a mystery player is from the North West still leaves you Liverpool, Everton, Burnley, and both Manchester clubs to untangle.
The honest answer is that they are three different puzzles wearing the same shirt. Learn the shared grammar, then learn each league's dialect. And then go test the theory on today's Champions League puzzle, where a single yellow team cell is worth an entire country.