One Rail - Train Track Puzzle

Relax, focus, and give your brain something satisfying to solve.
ONE RAIL is a logic puzzle about using number clues to complete a single railway line.

Your task is simple: build one unbroken route from the entrance to the exit while matching every clue exactly. Place the final rail and watch the train travel along the line you completed.

SIMPLE RULES, DEEP LOGIC
The numbers above and beside the grid tell you how many track cells belong in each row and column. Count the clues, then narrow down where the railway can and cannot go.

- Swipe to connect track
- Tap to mark an unused cell with an X
- Double tap to choose a track shape
- Join the entrance and exit with one continuous line

The track cannot split or end halfway. Match every number and create one complete route to solve the puzzle.

ALWAYS EXACTLY ONE ANSWER
Every puzzle is designed to have one solution that can be reached through logic alone. No quick reflexes or random guessing—start with one certain cell and work forward at your own pace.

FROM FIRST-TIME PLAYER TO CAREFUL SOLVER
Start with a friendly 4x4 board, then advance through 6x6, 8x8, and 10x10 puzzles. A short tutorial teaches the basics, while the difficulty adjusts naturally to how you are progressing.

A SMALL HELPING HAND
If you get truly stuck, the light bulb reveals the correct track for one cell. It gives you a fresh starting point without showing the entire answer.

A CALM, FOCUSED EXPERIENCE
- No timer—think at your own pace
- Short levels that fit neatly into a break
- A clean board built around numbers and rails
- A satisfying train animation when the route is complete

One board, one set of clues, and one railway line. Enjoy a small moment of thoughtful relaxation on your commute, during a break, or before bed.