Towerdle
The daily tower puzzle that compares heights in exact metres
Towerdle gives you six tries to name one tall structure. Three of its columns behave the way you expect from a guessing game; the height column compares your guess with the answer in exact metres and tells you only which way to move.
How a round goes
You start with an empty grid and a search box that holds all 526 structures in the pool. Name any of them and the row fills in with that structure's country, height, floor count and completion decade, each cell scored against the day's answer. You get six guesses, and then the reveal arrives whether you found it or not.
Every structure in the pool is a genuinely tall one, so even a wild opening guess buys real information. Most rounds go the same way: name something you know well, read the four cells as a bearing, and close the gap from two directions at once.
What the four columns tell you
Country matches or it does not. Floors and the completion decade are compared as numbers, with an arrow pointing towards the answer. Height is that same mechanic taken seriously: the cell shows the exact height of the structure you guessed, in metres, and the arrow says whether the answer stands taller or shorter.
The size of the gap is deliberately never sent to your browser, only its direction, because one guess plus a subtraction would otherwise hand you the answer's height outright. Where the record carries no floor count or no completion date the cell reads unknown, and an unknown never scores as a match for either side.
Where the numbers come from
Names, countries, heights, floor counts, completion dates, cities and architects come from Wikidata under CC0 1.0, frozen into the game rather than fetched while you play. A height is taken from the highest-ranked height statement on the record, in metres.
The calendar is 526 days long and uses each structure exactly once, so no answer ever repeats. It is also one long ramp: it opens with the towers that the most language editions of Wikipedia cover and works steadily towards the ones almost none do, so the puzzles get harder as the months pass.
What you end up knowing
When the round ends the game shows the verbatim English Wikipedia extract for the answer under CC BY-SA 4.0, with a link to the article and sourced facts such as the architect. After that come up to four bonus rounds, all of them about other structures in the set rather than the day's answer: which of two is taller, which city one stands in, which decade one was finished, which has more floors.
Play it for a while and you acquire a rough sense of scale that is hard to get any other way. Six hundred metres stops being an abstraction, and you start recognising which decades and which countries were putting up the tall things.
Questions
Is it the same puzzle for everyone?
Yes. One puzzle a day, identical for every player, rolling over at midnight UTC. The sequence is a fixed calendar built before release, not a random draw, so the answer for tomorrow is not sitting in today's page.
Do I have to type a height?
No. You only ever name a structure. The grid does the comparing for you and reports the exact height of whatever you guessed, plus an arrow towards the answer.
Do I need an account?
No. There is nothing to sign up for. Your streak and stats live in your own browser's local storage, and the cookies page has a control to export that record to a file if you want to move it to another browser.