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This book is intended for a general audience interested in recreational mathematics, [7] including mathematically inclined high school students. [4] It is intended to counter the widespread misimpression that Sudoku is not mathematical, [5] [6] [8] and could help students appreciate the distinction between mathematical reasoning and rote calculation.
When Sudoku is played with pencil and paper, possibilities are often called pencil marks. In the standard 9×9 Sudoku variant, in which each of 9×9 cells is assigned one of 9 numbers, there are 9×9×9=729 possibilities. Using obvious notation for rows, columns and numbers, the possibilities can be labeled R1C1#1, R1C1#2, …, R9C9#9.
The channel was set up in 2017 by two friends from England: Simon Anthony, a former investment banker, and Mark Goodliffe, a financial director. [5] [6] Anthony is a former member of the UK's world sudoku and world puzzle championship teams, while Goodliffe is a 13-time winner of the Times Crossword Championships and UK sudoku champion. [5] [6]
It was released in Japan on June 2 as Sudoku to 3-Tsu no Puzzle: Nikoli no Puzzle Variety (数独と3つのパズル～ニコリのパズルバラエティ～, Sudoku and 3 Puzzles: Nikoli Puzzle Variety); [21] in Europe on June 9 as Sudoku – The Puzzle Game Collection; [22] and in America as Nikoli's Pencil Puzzle on October 25. [23] [24]
A Sudoku whose regions are not (necessarily) square or rectangular is known as a Jigsaw Sudoku. In particular, an N × N square where N is prime can only be tiled with irregular N -ominoes . For small values of N the number of ways to tile the square (excluding symmetries) has been computed (sequence A172477 in the OEIS ). [ 10 ]
Wayne Gould (高樂德) (born 3 July 1945 in Hāwera, New Zealand) is a retired Hong Kong judge, most recently known for helping to popularise sudoku puzzles in the United Kingdom, and thereafter in the United States. He pioneered the global success and popularity of the Sudoku puzzle outside Japan where it had been popular for many years ...
Penny Publications, LLC is an American magazine publisher specializing in puzzles, crosswords, sudokus as well as mystery and science fiction magazines.Penny Publications publishes over 85 magazines [2] distributed through newsstands, in stores, and by subscription in the United States and Canada.
Dell Pencil Puzzles and Word Games, which first published Number Place in May 1979, did not publish Garns's byline on the puzzle. However, Will Shortz , a crossword compiler for The New York Times , discovered that Garns's name appeared in the list of contributors at the front of the magazine whenever Number Place appeared, and was absent from ...