Sudoku Varianti
Sudoku Varianti is an entire magazine created by studiogiochi for Sudoku s.r.l. For the same publisher studiogiochi realized also Grandi Sudoku, Kriss Kross, Logika, Mai Quattro, Mese Sudoku, 1,2,3... Sudoku, Settimana Sudoku, Sudoku & Cruciverba.
The front page of n. 3 and some pages as an example:
Our puzzles on Sudoku Varianti