How to Solve a Hashi Logic Puzzle
Hashi is a Japanese logic puzzle that utilizes a grid containing various circles (islands) containing numbers at the line intersections. Each number indicates how many lines or bridges attach to that specific intersection. When the puzzle is complete, the grid will contain a network of interlocked lines.
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Instructions
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1
Examine the hashi grid. Look for a "5" on the outside edge, a "7" anywhere in the grid, or a "3" in the corner. Each of these instances must have at least one bridge radiating from each direction, vertically and horizontally.
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2
Look over the grid for a "4" in the corner, an "8" throughout the grid, or a "6" along the border. These instances will have the maximum two bridges radiating from each direction.
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3
Cross off each island lightly when the bridges extending from the circles have reached the maximum.
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4
Glance over entire puzzle. Attach any obvious lines that need to be filled in. Always keep checking that no group of islands stand alone. Each island needs to be incorporated into the whole network.
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5
Use logic to figure out where the remaining lines need to be placed. Make sure to keep referring to the warnings on what is not allowed when solving the puzzle.
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Tips & Warnings
The islands must be connected by a straight perpendicular line. Diagonal lines are not allowed in hashi puzzles. Each island can only have the number of connections matching the number in the circle.
No lines can cross or cut over another island.
A pair of islands can have a maximum of two bridges connecting them.
All islands must be included in the network. No solitary islands are allowed.
