Křížovky • hádanky
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Welbeck
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Telegraph Media Group
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Linduff, Katheryn M. (University of Pittsburgh); Sun, Yan (Gettysburg College, Pennsylvania); Sun, Yan; Liu, Yuanqing
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Collins Puzzles
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Bajoria, Paul
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McGarry, Steve
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The Times Mind Games
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Telegraph Media Group
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Heine, Stefan
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Waley-Cohen, Jack
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The Times Mind Games
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Heine, Stefan
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The Times Mind Games
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Herring, Richard
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Telegraph Media Group
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Verhoef, Peter C. (University of Groningen, The Netherlands); Kooge, Edwin (Metriclab Big Data Analytics, The Netherland