Play Single-Bridge Hashi Online

Hashi usually allows up to two bridges between a pair of islands. This single-bridge variant permits one bridge per gap, so every island number must come from distinct neighboring islands. Click the dashed links to build a network. A complete solution satisfies every number and joins every island into one connected group.

1. Read the number inside each island; it tells you how many bridges must touch it.
2. Click a dashed link between two islands to add one bridge. Click again to erase it.
3. Only the marked horizontal or vertical gaps can hold bridges.
4. Check numbers at both ends each time you add a link.
5. Keep an open route to any island that has not joined the main network.
6. Finish when all counts match and all islands connect.
7. The dashed links show all legal routes between nearest islands. Each click toggles one link between empty and present. Unlike ordinary Bridges, this version has no second bridge on the same link. A number 3 therefore needs three distinct neighbors, not one double and one single. Green islands have met their numeric total.
8. Green islands only show that their individual counts are satisfied. To verify the entire board, start at one corner and follow the placed links, mentally marking each island reached. If you cannot reach one of the islands, erase a link from the isolated group and connect it to the rest. The single-bridge limit means every link contributes just one to both endpoints.

• Only one bridge may join a particular island pair.
• Bridges follow straight horizontal or vertical gaps and must not cross.
• Each island must receive exactly its displayed bridge count.
• The entire network must remain connected.
• The network must be connected as well as numerically correct. Check connectivity by picking any island and following bridges to see whether you can reach every other island. The marked routes never overlap at a location without an island, so the no-crossing rule remains visually clear here. Do not mistake a set of green islands for a finished network.

• A corner with two possible neighbors and clue 2 needs both bridges.
• A side island with clue 3 and three neighbors also forces all its gaps.
• Never complete a closed disconnected group while islands remain outside.
• A green island has the right count, but it may still lack a path to the main network.
• Use the one-bridge limit to rule out repeating a link when an island needs two more.

• Bridges: Compare how a related puzzle uses regions, paths or tile placement.
• Numberlink: Compare how a related puzzle uses regions, paths or tile placement.
• Slant: Compare how a related puzzle uses regions, paths or tile placement.

• The one-bridge limit makes edge deductions clear.
• Connectivity gives the final move a whole-map purpose.
• Single-bridge Hashi highlights the underlying network problem. Degrees are easy to check one island at a time, but joining the whole map requires a second pass. The toggle control lets you test a questionable route without erasing the entire puzzle. Compare this with regular Bridges when you want a version with double links.

Play Hashi Single Bridge free in your browser. Start the interactive board above, use its on-screen controls and check the rules below when a deduction gets stuck. No download or account is needed.

Try another round of Hashi Single Bridge on the board above. Start with the most constrained part of the grid, test each move against the stated rules, and use the reset control to try a new approach.

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