Before Sudoku: The World of Magic Squares: Block, Seymour S, Tavares, Santiago A: 9780195367904: Amazon.com: Books
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BoardGameGeek on Twitter: "Want a challenge? Solve this sudoku! • The diagonals have the numbers 1-9. • The center box is a magic square. • No number is a "knight's move" away
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Anything but square: from magic squares to Sudoku | plus.maths.org
Magic Square Sudoku (Daily Sudoku League #28)
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Anything but square: from magic squares to Sudoku | plus.maths.org
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Anything but square: from magic squares to Sudoku | plus.maths.org