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Logo Argio-logic.net
definitions and information are taken from Rohan Rao blog & Sudopedia

Rules:
Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. If the absolute difference between two digits in neighbouring cells equals 1, then they're separated by a blue border. If the digit in a cell is half of the digit in a neighbouring cell, then they're separated by a red border. The dot staying between '1' and '2' can have any of these borders. In the original grid, white dot are used in place of blue border and a black dot in place of red border

Inserire i numeri in modo che ogni riga, colonna, settore contenga i numeri da 1 a 9.Se la differenza assoluta tra due numeri in celle consecutive è =1, le celle sono separate da un bordo blu; se un numero è il doppio dell'altro, le celle sono separate da un bordo rosso. Qaundo lo schema venne ideato si usarono cerchietti bianchi o neri al posto dei bordi blu e rossi.


Solution