Shinro

A Shinro puzzle in its initial state...

...and with the hidden Holes displayed.

Shinro (しんろ) is a logic-based puzzle that has similarities to Sudoku and Minesweeper. The objective is to locate 12 hidden 'Holes' on an 8×8 grid. The board contains a variable number of arrows, each of which points to at least one Hole. A count of the number of Holes is given for each Row and Column.

Originally appearing in Japanese puzzle magazines, Shinro was popularized by its appearance in Southwest Airline's Spirit Magazine.^[1] It has since spawned web-based and iPhone versions.

New York City -based puzzle-writing company Puzzability has been credited with coining the name Shinro in 2007.^[2] The name Shinro (しんろ) translates to "compass bearing", referring to the arrows that point towards the Holes.^[3]

Websites:

• Southwest Airlines Spirit Magazine, Fun and Games section Downloadable PDF with four puzzles
• Shinropuzzles website Printable puzzles with solutions
• Sternenhimmel (Babelfish translation^{[yes|permanent dead link|dead link}}]}) German variation where each arrow points to only one Hole
• Evolutionary Algorithm for Generation of Entertaining Shinro Logic Puzzles by David Oranchak
• playshinro.com online Shinro games

iPhone:

• Shinro Mines
• Jabeh with video tutorial
• Sudoku Shinro

Android:

• Shinro: Minefield

• Logic puzzle

• Shinro tutorial
• Downloadable puzzles, Shinro tutorial, and a book

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