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Sudoku: 300 Intermediate level puzzles 8.5 x 11 book# 3 (Paperback) (ISBN-13: 9798706702434)
Vendor:
Mariano Juan Lobaton
Product type:
Books
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Description
x- Number puzzles appeared in newspapers in the late 19th century, when French puzzle setters began experimenting with removing numbers from magic squares. Le Si cle, a Paris daily, published a partially completed 9 9 magic square with 3 3 subsquares on November 19, 1892. 7] It was not a Sudoku because it contained double-digit numbers and required arithmetic rather than logic to solve, but it shared key characteristics: each row, column and subsquare added up to the same number.
- On July 6, 1895, Le Si cle's rival, La France, refined the puzzle so that it was almost a modern Sudoku and named it carr magique diabolique ('evil magic square'). It simplified the 9 9 magic square puzzle so that each row, column, and broken diagonals contained only the numbers 1-9, but did not mark the subsquares. Although they are unmarked, each 3 3 subsquare does indeed comprise the numbers 1-9 and the additional constraint on the broken diagonals leads to only one solution. 8]
- These weekly puzzles were a feature of French newspapers such as L' cho de Paris for about a decade, but disappeared about the time of World War I. 9]
Author: Mariano Juan Lobaton
ISBN-10: 8706702430
ISBN-13: 9798706702434
Publisher: Independently Published
Language: English
Published: 02/08/2021
Pages: 110
Format: Paperback
Weight: 0.60lbs
Size: 11.02h x 8.50w x 0.23d
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