Logic Brain Teasers: Doppelblock Puzzles - Large Print For Fun Travel

By Sandra Berry

Doppelblock ("Double Block") consists of a square grid. The goal is to blacken two cells in each row and each column. The remaining white cells must be filled with the digits from 1 to N-2, where N is the size of the puzzle's side. Each digit appears once in every row and column. Numbers outside the grid show the sums of the digits between two black cells in corresponding row or column.

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• Format: Paperback
• Language: English
• ISBN: 171787553X
• ISBN13: 9781717875532
• Release Date: July 2018
• Publisher: Independently Published
• Length: 116 Pages
• Weight: 0.40 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"