There should be digits 1 to 9 in every row, column and 3x3 block. In addition orthogonal neighbor cells should not contain the triple value.
Example: Digit 3 in r6c8 prevents 1 and 9 in r5c8, (r7c8, r6c7) and r6c9.
Solution code: row 3 and row 5
on 8. January 2014, 19:09 by r45
Schöne Konstruktion, vielen Dank.
on 22. December 2013, 19:23 by surbier
(Schreibfehler verbessert)
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