Indices Within (Index Line 159 Sudoku)
(Published on 23. July 2026, 18:10 by Nell Gwyn)
- Sudoku: Place the digits 1 to 9 once each in every row, column and box.
- 159: Digits in the first, fifth and ninth columns give the position of the 1, 5 and 9 (respectively) in their respective rows (e.g. if r4c1 is a 7 then r4c7 is a 1).
- Index Lines: The Nth digit on a blue line (starting from the diamond) gives the position of the digit N along that line (e.g. if the 2nd digit along a line is a 5, then the 5th digit along that same line must be a 2).
- Killer: Digits in a cage cannot repeat and must sum to the number in the corner.
Solution code: Row 5, followed by row 9
Comments
on 5. October 2026, 19:48 by puzzlepandit
Very few puzzles are coming nowdays with indexing rules. Hence felt this good to solve,
on 22. September 2026, 07:28 by ark29
I've been solving 159 puzzles recently and found this very enjoyable. Personally felt more like a 2 star than a 3
on 4. August 2026, 16:07 by Snaques
Still my absolute favorite ruleset and another lovely 159 puzzle.
This one was just beatiful with the simplicity of the grid in the beginning. Very cool to see it unravel.
on 1. August 2026, 01:41 by Stabbers
wonderful collision of related ideas
on 24. July 2026, 07:13 by Elliott810
Brilliant puzzle with a very powerful combination of constraints. Thank you:)
on 23. July 2026, 20:14 by palpot
brilliant puzzle! thanks for sharing.
on 23. July 2026, 19:38 by Ambrose
Beautifully clever opening!
