Section Sudoku transferred on a common gaming platform

Section Sudoku transferred on a common gaming platform. It was the last remaining section of puzzles (jigsaw puzzles catalogs and Jacob don't count), who worked independently from the core functionality of the site. This means, for a Sudoku to have the same opportunities as all other puzzles (the relationship with the achievements, missions, tournaments, conservation, drops, etc., etc.) Also migrated all of the information about game saves and evaluations of the old section.

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