Does anyone here like colour hanjie puzzles.... or should that be nonograms or griddlers?
The rules of colour puzzles are almost identical to those for black and white, apart from one change. That change is that regions of different colours CAN be next to each other.
So if you had 1,2,1 where the ones are in black and the 2 is in blue (ie just two different colours) then you COULD have four adjacent cells that were coloured in.
However, if it was 1,2,1 all in the same colour then there would have to be two gap cells at least between the 1 and 2 and then the 2 and 1 and so the minimum width this region could apply to would be 6 cells (4 + 2).
Then again, if the first 1 was colour a and the 2 1 colour b then you would only need a gap between the second two and one, not the first one and two.
It's not actually that confusing once you get used to it, and the best thing about colour hanjie / griddler puzzles is that not only do you get to use your colouring pencils that have been lying around since childhood but, much more than that, the quality of the images can be a lot better than the single colour ones which are often quite basic and blocky and hard to make out. However it is very hard to come across them!
How to solve a Sandwich Sudoku If you know the rules of sandwich sudoku but aren't sure how best to tackle a puzzle, this video walks through a puzzle and how to solve it to get you started. Highly recommended, as it's a really fun puzzle type to solve...
If you've never solved a sandwich sudoku, then a 6x6 puzzle is a good place to start. You can have a go at solving the puzzle featured in the video here: 6x6 Sandwich Sudoku Puzzle Online
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