Mind Puzzles For Teens: Doppelblock Puzzles - 100 Large Print Puzzles

By Deborah Andrews

Doppelblock 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: 1983278041
• ISBN13: 9781983278044
• Release Date: June 2018
• Publisher: Independently Published
• Length: 116 Pages
• Weight: 0.40 lbs.
• Dimensions: 0.3" x 6.0" x 9.0"