Contact puzzlemix
Play free puzzles         Create free account         Instructions         Discussion forum         Log in    

Show only:

Click on column headings to sort.

Brained Up, daily online brain training site
daily online brain training
Cutting-edge brain training created by Dr Gareth Moore
Think faster, better,
and improve your mental capabilities

Sudoku Xtra, written by Dr Gareth Moore
Sudoku Xtra 24
logic puzzle compendium
Printed puzzles from Dr Gareth Moore


Back to the forum

Give Kropi with only white dots or only black dots

5 comments (Add new comment)
Posted 6th May 2020 at 21:01
Is it possible to make Kropi so that it has either "only white dots" or "only black dots".

Seen two with "only white dots", but I couldn't solve either of them so I don't know whether that was a mistake or my lack of knowledge. (sudokumania site)

The twist is - when we apply only one part of rule (consecutive or double-half), we tend to forget that the other rule (that in MUST NOT be double-half or consecutive) so we tend to commit mistakes. A good example of habit bringing blindness.

If it is possible to make that please give a few on this site.


Posted 6th May 2020 at 22:43
Last edited by JoergWausW 6th May 2020 at 22:52
JoergWausW Daily subscriber
A 6x6 solution with only white dots could be this:


But maybe I missed something.

Posted 6th May 2020 at 22:51
Last edited by JoergWausW 6th May 2020 at 22:52
JoergWausW Daily subscriber
And only black dots:


Posted 7th May 2020 at 00:30
gareth Administrator Daily subscriber
It's a nice idea, but the 'negative' rules already cause enough confusion to a significant minority of players so I don't think Puzzlemix is the best place for this. You could certainly create both variations, though, as JoergWausW has I think shown. You could make the black-dot-only ones by opening a Non-consecutive from Puzzlemix and labelling the kropki dots, for a start.
Posted 7th May 2020 at 14:15
JoergWausW Daily subscriber
You can always try to invent new kinds of puzzles.

I'd lika a combined "Wraparound Non-consecutive Killer Kropki Sudoku-X", please.

Or a 17x17 Hitori - and after solving it, the numbers go away. The black squares of the solution remain and become the hints for a Kropki Sudoku (without white dots) played on the same grid only in the odd rows and columns (the hitori would be boring, though).

Or combine Hanjie with Kakuro: The Hanjie grid is filled with numbers, the clues shade some squares - only those are valid for the Kakuro - unshaded cells have to be refilled according to the found Kakuro clues....

Add new comment
Add a comment
Your comment:
Sorry: You must log in (create a free user) in order to be able to post comments on this topic.

You can however view other players' statistics and comments in the tables above.

Post comment

Back to the forum

©Brained Up Ltd/Gareth Moore 2005-2021 - email - publishers please visit Any Puzzle Media - our privacy policy - registered in England & Wales no. 8642393