enxio27 wrote:
Here is what SudokuSolver gave me as the next step:
Quote:
General Common Peer Elimination on 5 at r3c23 r1c2 in n1
Removed candidate from r5c2
Looks like you found a bug in SS but I can't get it to do this. Instead, it finds an ALSxz step but then needs brute force. Perhaps you could email Richard with the puzzle and version number of SS plus the exported .SSV routine order you are using.
enxio27 wrote:
I don't know what is meant by General Common Peer Elimination
This technique is common in killer sudoku when a cage and another cell force a common peer in strange places. On this site, we usually shorten it to CPE. See
this thread. The simpler version, Common Peer Elimination is also common in sudoku variants such as jigsaw sudoku and x-sudoku. See
here for some examples.
According to JSudoku, the puzzle you have posted above has more than one solution so perhaps there is another constraint you overlooked. Tried a few variations with JS but it couldn't find one that gave a valid solution for those marks. However, I can't think of any possible constraint that SS would call General Common Peer Elimination unless it gets anti-chess Knight eliminations that way. SS sometimes does things in funny ways.
Curious one. Thanks enxio!
Cheers
Ed