WELCOME IN THE ARGIO-LOGIC WORLD !
Argio-Logic is a site populated by a very heterogeneous community (from childrens to "well on in years adults") who made the game, especially the games of intelligence, his hobby.
Here you'll compare yourself with "duffers and phenomena", select your specialty and, other permitting, excel in one or more of these.

....in the heart of Sudoku
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....in the heart of Sudokers