How to play Hashi.
Connect every numbered island with the exact number of bridges—and make one complete network.
The whole rule set: bridges run horizontally or vertically, never cross, and there can be at most two between a pair of islands.
What each number means
An island's number is the total number of bridges that must touch it. A 1 needs one bridge; an 8 in the open centre needs two bridges in all four directions. Bridges only connect visible islands in the same row or column.
The four rules
- Draw one or two bridges between aligned islands.
- Make the total at every island match its number.
- Never let bridges cross another bridge or pass through an island.
- Connect all islands into one network; isolated groups are not allowed.
Good first moves
Start with constrained islands. A corner 4 must send two bridges in both available directions. A side 6 must send two in all three directions. Also watch low-number islands: connecting two 1s can close a finished group too early.
Play a board
A real Hashi board, playable here. Tap the space between two islands to cycle no bridge, one, two. Break a rule and the page names it.
- Match every number. It counts the bridges touching that island.
- Two at most. No more than two bridges between the same pair.
- Nothing crosses. Bridges may not cross each other or pass over an island.
- One group. Every island must be reachable from every other.
Hashi on your phone
The same puzzle on iPhone and Android, including a board part-way through.
Where to play Hashi
Hashi is on iPhone, iPad and Android.
