How to Play Bridges (Hashi)
Bridges, also called Hashi, is a logic puzzle played on a grid of islands. Each island holds a number. Your job is to join the islands with bridges so that every number is right and every island is connected to the rest.
The rules
- Bridges run in straight lines, across or down, from one island to another. They never bend or go diagonally.
- Each island has exactly as many bridges as its number.
- At most two bridges join the same pair of islands.
- Bridges never cross each other and never pass through an island.
- When you are done, all the islands form one connected group: you can walk from any island to any other.
Every puzzle here has exactly one answer, and you can always reach it by logic alone. You never need to guess.
Difficulty
| Level | Board | What it takes |
|---|---|---|
| Easy | 7×7 | Each step follows from one island and its neighbours |
| Medium | 10×10 | Keeping the islands joined: never close off a group too early |
| Hard | 13×13 | Short “what if” steps: try a bridge, see a contradiction a few moves later |
| Expert | 16×16 | Longer “what if” chains across the board |
Difficulty comes from the kind of reasoning a puzzle needs, not just its size. Our solver checks every puzzle and sorts it by the hardest step it needs.
Solving tips
- Count the room. An island can only get bridges from the islands it can see. A 4 with only two neighbours needs two bridges to each of them. A 3 with two neighbours needs at least one to each.
- Big numbers in corners. An island in a corner has at most two neighbours, so a 4 there is fully decided, and a 3 there has at least one bridge each way.
- Don’t close a group early. Two 1s next to each other can’t be joined: the pair would be cut off from everything else. The same goes for a double bridge between two 2s.
- One way out. If a group of joined islands still needs bridges and only one bridge can leave it, that bridge must be there.
- Watch the crossings. A bridge you place rules out every bridge that would cross it.
Common questions
Is Bridges Puzzle free? Yes. It runs in your browser with nothing to install, and there are no ads.
Is there a daily puzzle? Yes. One new 10×10 puzzle every day at midnight your local time, the same for everyone. Past days are in the calendar.
Can a puzzle have two answers? No. Every puzzle is checked by a solver before you see it.
Is Bridges the same as Hashi? Yes. Hashi (short for Hashiwokakero, “build bridges”) is the same puzzle. Bridges Puzzle is an independent site and is not affiliated with any other puzzle publisher.