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Outside Anti Diagonal
Quadruple Anti Diagonal
Quadruple Anti Knight
Quadruple Anti XV
Quadruple Quadro
Rossini Outside
Skyscraper Anti Knight
Skyscraper Anti XV

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definitions and information are taken from Rohan Rao blog & Sudopedia

Rules:
Place numbers in the grid such that every row, column and 3x3 box contain the numbers 1 to 9.
Follow the rules of Quadruple and Quadro.

Seguire le regole del Quadruple e Quadro.



Solution