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 Post subject: LC Killer NC 4
PostPosted: Wed Sep 11, 2019 6:11 pm 
Grand Master
Grand Master

Joined: Wed Apr 30, 2008 9:45 pm
Posts: 571
Low Clue Killer NC 4

It is NC which allows me to have bigger cages and cut out more clues.

The original puzzle from JSudoku was symmetrical however I have merged some cages to make it harder, so:

N5 is self symmetric.
The boundaries that are internal to nonets are symmetrical (i.e. thin cell boundary lines). Be careful here as it is easy to make mistakes.
If a cell boundary is completely within a nonet eg the r1c78 boundary it either has no cage boundaries or both cage boundaries and the boundary at r9c23 is the same. The boundary at r1c67 does not have to be the same as the boundary at r9c34.
As is standard with uncaged killers the puzzle is fully covered in cages so the outer boundaries are symmetric.


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