- 28 - free block sudoku.png (55.62 KiB) Viewed 5213 times
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).
Free Block Sudoku [WSC 2015]
Free Block Sudoku [WSC 2015]
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).
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]
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.