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Free Block Sudoku [WSC 2015]

Posted: Sun 17 Feb, 2019 12:48 pm
by Fred76
28 - free block sudoku.png
28 - free block sudoku.png (55.62 KiB) Viewed 3211 times
Source: 2015 WSC, Sofia

Potential issue: again the lack of regions. Authors are free to chose which part of the grid has a third constraint. This constraint being only to be "deficit" regions (of any size).

Re: Free Block Sudoku [WSC 2015]

Posted: Sun 10 Mar, 2019 3:07 pm
by TiiT
It's a dangerous variant. I would say that you can make this variant with only one region with 2 cells. I wouldn't say it's a sudoku.