Hashiwokakero
Build bridges to connect all islands.
↑ This is Hashiwokakero running right here in your browser — no download needed.
About the game
Hashiwokakero, or Bridges, is a logic puzzle: connect numbered islands with horizontal or vertical bridges so that each island's bridge count equals its number, and all islands form one network.
How to play
Draw one or two bridges between adjacent islands along rows or columns. The number on each island must match its total bridges, with no crossing lines and full connectivity.
Tips & strategy
['Start with islands showing 1 or 2 on the edge - they have few options.', 'Use 8s in the center and 3s in corners as anchors.', 'Ensure the whole graph stays connected.']
Advanced guide
Solve Hashiwokakero by anchoring extremes. Edge islands numbered 1 or 2 and corners numbered 3 have forced connections; lock them first, then use high central numbers to fill the middle. Always check that your network remains one connected piece - a stray island ruins the solution.
History & origins
A Japanese pencil puzzle from the 1990s, Hashiwokakero is a favorite logic-grid challenge.
Frequently Asked Questions
How many bridges between two islands?
At most two, in parallel.
Can bridges cross?
No - lines may not intersect.
What does the number mean?
Total bridges touching that island.
Must all islands connect?
Yes - the final network is a single connected group.
How do I start?
Fix obvious low and high counts, then propagate constraints.
Is it always solvable by logic?
Proper puzzles are, without guessing.
Where can I play Hashiwokakero for free?
Right on this page — Hashiwokakero is embedded above, free, legal, and with no download or sign-up. Play with your keyboard on desktop or touch controls on mobile. Your best score is saved in your browser, so it's still there next time. Every game here is original or open-source, with links that stay valid.