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Conceptis Puzzles
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Dr. Gareth Moore
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Elonka Dunin,
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Editors of Nikoli Publishing
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Frank Longo
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The Times Mind Games
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The Times Mind Games
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The Times Mind Games
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Robert Fuhrer (Editor)
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The Times Mind Games
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Dr. Gareth Moore,
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Robert J Lang
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Can You Solve My Problems?: A...
Alex Bellos
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Dr. Gareth Moore,
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The Times Mind Games
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Flightradar24,
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More Original Sudoku
Editors of Nikoli Publishing
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Tom McCluskie, MBE,
Michael Sharpe
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