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The pages are created by two ‘sudoku-nuts‘ - Ankora a Thanyk.

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Statistics and database: Ankora a Ales
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Authors of online variants unconventional assignments: Gotroch, jhrdina, cauchy, Čert, Caca, janoslaw, Anonyme, Kodyn, ttsoftt, KrtekHonza, babilon, gauravkorde, Fred76, Ankora, RohanRao, Tejal Phatak, jaku111, oddest, Paola,Ours brun, JiBen,Vladimír Portugalov
Happy mood: all regular FED-sudoku players :)