If I'm ever stuck for ideas, sometimes it's fun to return to a combo of variants I've done before - I can find implications that I didn't see on prior use! This is one of those - in this case, I'm coming back to putting indexing lines and sum dots together.
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Rules:
- Normal sudoku rules apply.
- Index Lines - on a dark pink index line, the digit in the Nth cell along the line (starting from the diamond) indicates the position along the line where the digit N appears. Eg: 3214 would be a valid line; the 1st digit, 3, indicates that the 3rd digit is a 1, and so on. Please note that in this puzzle, the diamond in R9C2 is attached to two different indexing lines.
- Ratio Kropki - digits separated by a black Kropki dot have a ratio of 2:1. No negative constraint.
- Sum Dots - the (2 or 4) digits surrounding a brown sum dot add up to the value in the middle of the sum dot. Repeats are allowed if available by other rules.
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Puzzle:
Solution code: Column 9, top to bottom
on 11. July 2026, 17:50 by SpringPeonies
very very nice puzzle. First time solving index line and was very engaging. Definitely recommend!
on 30. June 2026, 15:29 by Kattorzeh
A good index lines refresh for me, thanks!
on 27. June 2026, 02:18 by senpai
Good for beginners
on 26. June 2026, 14:22 by abadx
Very approachable index lines with some hi/lo number pairing in the middle game. Nice solving path
on 26. June 2026, 02:31 by rictech
Nice! Index lines are fun!