Punzhu Puzzles: Hitori
Hitori puzzles were first published in Japan by Nikoli and are a logic puzzle similar somewhat to sudoku.
The puzzle is based on a grid in which numbers are placed in each square. To solve a Hitori puzzle a player must cross out or circle squares so that 1) no number appears more than once in each row or column, 2) crossed out or circled squares are not adjacent and, 3) all the remaining squares, two squares or more, allow you to move horizontally or vertically without hitting a crossed out or circled square.
To design a Hitori puzzle we first set the number of squares we want across and down. This is the grid. Then we input the numbers that become the puzzle. We do this manually, as compared to some Hitori puzzles that are computer generated and don't always follow proper technique in that two adjacent squares are visible.
Here are examples of a grid and a solution to a Punzhu Puzzles Hitori puzzle:
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- Directory:Punzhu Puzzles