description Hashi (Bridges) Overview
Hashi, also called Bridges, is a logic puzzle in which numbered circles, or islands, are joined by horizontal or vertical bridges. A solution must obey the numbers shown on the islands, usually permits at most two bridges between the same pair, and requires every island to belong to one connected network without loops. The puzzle is associated with Nikoli publishing and is intended for deduction through systematic reasoning rather than arithmetic or guessing.
help Hashi (Bridges) FAQ
What are the actual rules of Hashi (Bridges)?
You join numbered islands with horizontal or vertical bridges so each island's number equals the count of bridges touching it, with at most two bridges between any pair and no bridges crossing. Every island must end up connected in a single continuous network.
Where does the Hashi puzzle come from?
It comes from Nikoli, the Japanese puzzle publisher that also standardized Sudoku, under the name Hashiwokakero ('build bridges'). The Guardian newspaper runs it in English under the name Bridges.
How is solving Hashi different from solving Sudoku?
Sudoku is a symbol-placement puzzle, while Hashi is a connection puzzle where difficulty comes from ruling out impossible links. Certain numbers anchor the grid immediately — an island labeled 8 must take two bridges in all four directions.
Where can I play Hashi online for free?
Dedicated sites like Puzzle Bridge and BrainBashers offer free puzzles, The Guardian publishes Bridges in its puzzle section, and many mobile apps exist. Nikoli also sells printed puzzle collections in English.
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