What Is Roundle? The Train-Travel Wordle Game Explained

Roundle is a daily online puzzle game inspired by Wordle — a railway guessing game where, instead of guessing a five-letter word, you guess a train journey. Each day presents a mystery trip, and you have six attempts to identify the exact set of three trains — with valid interchanges between them — that completes it.

The Concept: Wordle Meets the Railway

Wordle's format has been borrowed by countless spin-offs: countries (Worldle), films, songs, even subway systems. Roundle takes the formula to the railway. The puzzle gives you a trip to make, and your job is to find the one specific three-train routing that matches the puzzle of the day — not just any route that works, but the exact combination the game has in mind. The genre was pioneered by Subwaydle, the three-train New York subway route puzzle created by Sunny Ng in January 2022 (Ng later published a London Underground edition also titled Roundle, in May 2022).

After every guess, you get feedback on how accurate your selection was, with hints steering you toward the right answer. A new train challenge appears daily, so there's always a fresh puzzle to chew on.

How to Play Roundle: The Rules

The rules, as described on the game's listing pages (wordhurdle.co/roundle; wordletoday.io/roundle):

1. Objective. Guess the specific set of three trains that can make the day's trip, within six attempts.
2. Valid trips only. Each guess must be a valid train trip involving three trains, using valid interchanges between them. You can't just name any three trains — the connections have to work.
3. One routing is the answer. Multiple routings might theoretically make the trip, but only one matches the puzzle of the day. The solution isn't necessarily the fastest or most efficient route, which adds a real layer of deduction.
4. Off-peak scheduling. Routing for each train line is based on the weekday off-peak schedule, so trains run according to specific routes and timetables you need to factor in.
5. Six attempts. Like Wordle's six guesses, you get six tries. Each wrong guess narrows the field and the feedback hints push you closer.

A quick example of the thinking involved

Suppose the puzzle asks for a trip across a city. Your first guess might use three well-known lines with obvious interchanges. The feedback tells you one of the trains is wrong — so you reconsider: which lines actually connect at valid interchange stations on the off-peak timetable? Each guess is a hypothesis about the network, tested against the game's hidden answer.

Strategies and Tips for Roundle

• Learn your interchanges. The game is won at the connection points. Knowing which stations allow transfers between which lines is the single most valuable knowledge.
• Don't assume the fastest route. The puzzle explicitly warns the answer may not be the most efficient routing — think like a puzzle setter, not a commuter.
• Use the feedback fully. Each attempt returns accuracy feedback on your train selections; treat wrong trains as eliminated and rebuild around what survived.
• Mind the off-peak timetable. Routing follows the weekday off-peak schedule — services that only run at peak times won't be part of the answer.
• Start broad, then narrow. Open with trains covering different parts of the network to maximize information, then converge on the correct trio.
• Play daily. Like all daily puzzle games, regular play builds an instinct for the setter's habits.

Roundle vs Other Wordle Spin-Offs

Roundle stands out because the answer isn't a single item but a combination — three trains plus their interchanges — making each guess a small piece of route planning rather than a vocabulary test. If you enjoy the maths-flavoured branch of the family, our Nerdle game guide covers the equation-guessing variant.

A Worked Example: Solving a Roundle Puzzle Step by Step

To see how Roundle thinking works, imagine a hypothetical puzzle asking for a trip across a city network — this is an illustration of the method, not a real daily answer:

1. Guess 1 — go broad. Pick three well-known lines that cover different parts of the network, joined at major interchanges. The feedback says two trains are correct but the third is wrong, and one interchange is invalid.
2. Guess 2 — fix the interchange. Keep the two confirmed trains and swap the third for a line that genuinely connects at a valid station on the off-peak timetable. The feedback now confirms all three trains but flags the order of one connection.
3. Guess 3 — reorder the routing. Try the same three trains with a different interchange sequence. If the feedback confirms two connections but not the third, you know exactly which link to change.
4. Guess 4 — close it out. With two confirmed trains, one confirmed interchange and the timetable in mind, there is usually only one sensible routing left. Enter it and solve.

The pattern is always the same: broad first guess, then use the feedback to eliminate rather than to confirm. Each wrong train or bad interchange is information — write down what failed so you never repeat it. Like all daily puzzle games, regular play builds an instinct for the setter's habits, and after a week you'll start recognising which interchanges the puzzles favour.

Where to Play Roundle

Roundle is a free browser game — no download or sign-up needed. It's listed on Wordle-aggregator sites including wordhurdle.co/roundle and wordletoday.io/roundle, where you can play the daily puzzle alongside dozens of other Wordle variants.

A note on the name

"Roundle" is also an English word — a variant spelling of "roundel" (a circular motif), playable in Scrabble and found in Collins Scrabble Words. If you search the term, you'll hit dictionary and anagram pages too; the game is the train puzzle described here. The word-guessing family has produced a few near-homophone names (Wordle, Worldle, Nerdle, Heardle), so it pays to check you're opening the railway version: if the page asks you to pick trains rather than letters, you're in the right place.

The Bottom Line

Roundle is Wordle for rail enthusiasts: six guesses, three trains, one exact trip. Unlike letter-guessing games, this daily guessing game is a route-planning puzzle — every attempt is a hypothesis about a real rail network, tested against off-peak timetables and interchange stations. Master your interchanges, respect the off-peak timetable, and never assume the obvious route is the answer — then put your network knowledge to the test in today's puzzle. For a broader tour of the Wordle-variant universe, see our round-up of daily puzzle games.