Lockout lines: Digits in the diamonds at the ends of a lockout line must differ by at least 4. Digits on the line may repeat but cannot be equal to or between the digits in the diamonds.
Kropki dots: Digits on either side of a white dot are consecutive. Not all possible dots are shown.
Some of our other puzzles you might enjoy:
Solution code: Row 2 (left to right) followed by row 3 (left to right); 18 digits, no spaces.
on 1. November 2022, 23:33 by chain.reader
Huh, nice.
If you're stuck like I was:
1. remember: What can't *ever* be on the line in a lockout line?
2. Where can the contents of 'that cell' go in 'that box' .. ( there's only 2 or 3 interesting cells at the place I was stuck at, that were obviously important to get me moving again...)
>> :) great suggestions!