Watch Your Step (with Sotehr)
(Published on 3. October 2025, 13:51 by sujoyku)
Rules:
- Normal sudoku rules apply, i.e. each row, column, and 3x3 region has to contain the digits from 1 to 9 once each.
- Periodic Sums: A clue outside the grid indicates the sum of N and every Nth digit in the row or column, where N is the digit in the first cell seen from the clue.
Example: If there is a 16 clue to the left of Row 5 and r5c1 is a 3, then r5c1, r5c4, and r5c7 must sum to 16.
- Index Lines: Each turquoise line is an Index Line, i.e. the digit in the Nth cell along such a line (starting from the diamond) indicates the position along the line where the digit N appears. For example, if a diamond cell contains a 3, the third cell along that line must have a 1.
Here you can solve the puzzle online:
Solution code: Column 9 from top to bottom (9 digits in total)
Comments
on 6. October 2025, 16:53 by Franjo
Lustige Idee, schöne Umsetzung. Vielen Dank für das tolle Puzzle.
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Sehr gern geschehen, Franjo, vielen Dank für deinen Kommentar! Es freut uns, dass Dir das Rätsel gefallen hat.
Herzliche Grüße, sujoyku
on 4. October 2025, 19:30 by RedBarchetta
Well constructed. It held out until the end of the index lines for me. Quite fun, thanks!
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You are much welcome, RedBarchetta, thank you for your comment! We are glad you had a fun solve.
Kind regards, sujoyku
on 4. October 2025, 18:44 by Erro
Thank you for the enjoyable puzzle!
At first the ruleset seems a little unfamiliar, but when you are used to it it is pretty clear.
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Thank you for commenting, Erro! We are glad you enjoyed the new Periodic Sums constraint.
Kind regards, sujoyku
on 4. October 2025, 04:12 by rameshsrivats
Very enjoyable
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Thank you, rameshsrivats!
Kind regards, sujoyku
on 3. October 2025, 21:50 by Exigus
Lovely puzzle, had a great time. Thanks!
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You are much welcome, Exigus, thank you for your comment! We are glad you had a good time when solving the puzzle.
Kind regards, sujoyku
on 3. October 2025, 18:59 by Zibl
Lovely puzzle! Love the new clue/rule. Looking forward to seeing what else pops up with it. :)
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Thank you for your comment, Zibl! It is great to hear you enjoy the new variant.
Kind regards, sujoyku
on 3. October 2025, 18:08 by ChinStrap
Very nice as long you don't mess up steps with position. Kept causing off by 1 errors that were 100% my fault. Very smooth from opening to end.
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Thank you for your comment, ChinStrap! It is easy to confuse distance with (indexing) position. That also happened to me a lot when I first solved Sotehr's example puzzle. We are glad that you enjoyed it.
Kind regards, sujoyku
on 3. October 2025, 17:11 by gdc
Interesting new outside clue. Took me a bit to understand its secrets but it gets quite intuitive after a few minutes.
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Thank you for your comment, gdc! You are completely right, it takes a bit of getting used to. We are glad that, in the end, you found it intuitive.
Kind regards, sujoyku
on 3. October 2025, 14:39 by Scorps
interesting interaction of the rules, thanks for sharing
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You are much welcome, Scorps, thank you for your comment!
We are glad you enjoyed it.
Kind regards, sujoyku
on 3. October 2025, 13:53 by Sotehr
A wonderful combination, if I do say so myself. Thanks for making this with me!
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Always! Thank you for inviting me to set with this fun new ruleset together. I've had a blast setting with you and cannot wait for more.
Kind regards, sujoyku
