Brain Riddles For Adults: Santoitchi Puzzles - 100 Large Print Brain Puzzles

By Sandra Berry

Santoitchi ("Sandwich") is a logic puzzle invented by Naoki Inaba (Japan). A rectangular or square grid contains numbers in some cells. The task is to blacken some empty cells according to the rules: - All white cells must be divided on regions having the size of exactly three cells. - Two black cells must not be orthogonally adjacent. - Each region contains a number. - A number indicates how many black cells share an edge with that region.

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• Format: Paperback
• Language: English
• ISBN: 1717960588
• ISBN13: 9781717960580
• Release Date: July 2018
• Publisher: Independently Published
• Length: 116 Pages
• Weight: 0.40 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"