Gokigen Naname

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A solved Gokigen Naname puzzle
A solved Gokigen Naname puzzle

Gokigen Naname is a binary-determination logic puzzle published by Nikoli.[1]


Gokigen Naname is played on a rectangular grid in which numbers in circles appear at some of the intersections on the grid.

The object is to draw diagonal lines in each cell of the grid, such that the number in each circle equals the number of lines extending from that circle. Additionally, it is forbidden for the diagonal lines to form an enclosed loop. Unlike many of Nikoli's similar puzzles, such as Hashiwokakero, a single network of lines is not required.

Solution methods[edit]

As a direct consequence of the rules, all diagonal lines must be connected to the edges of the grid by other such lines. If not, one would immediately create a closed circuit around this line. Therefore, if a network of lines does not touch the edge of the grid, and only has one place where it can touch the edge, then it must do so.

See also[edit]


  1. ^ David J. Bodycombe (4 December 2007). The Riddles of the Sphinx: And the Puzzles, Word Games, Brainteasers, Conundrums, Quizzes, Mysteries, Codes and Ciphers That Have Baffled, Entertained and Confused the World Over the Last 100 Years. Penguin Group USA. ISBN 978-0-14-311275-4. Retrieved 14 August 2013.

External links[edit]