Up to N
(Published on 8. April 2025, 11:45 by sujoyku)
- Normal sudoku rules apply, i.e. each row, column, and 3x3 box has to contain the digits from 1 to 9 once each.
- Up to N-sums: A clue outside the Row or Column N indicates the sum of all digits up to the cell that contains the digit N. (The digit N itself is not included in the sum.)
Example: If Row 1 reads 234156789, it would have an Up to N-sum clue of 2+3+4=9 because 2, 3 and 4 are the digits appearing before the row number N=1.
Here you can solve the puzzle online:
Solution code: Column 8 from top to bottom (9 digits in total)
Comments
on 25. November 2025, 20:48 by silent_rob
Thanks sukoyku for such a lovely puzzle and fun ruleset! When I saw this variant pop up I looked for the original puzzle to try first. Now I’m looking forward to solving some that have been set since this one.
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Thank you for your comment, silent_rob! I am glad that you enjoy the Up to N-variant.
Kind regards, sujoyku
on 22. October 2025, 05:22 by MysticMan
Not my first Up to N, but it was nice to solve the first one. I'm looking forward to solve the other ones. Lovely puzzle!
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Thank you for your comment, MysticMan! I am glad that you liked the first Up to N-puzzle.
Kind regards, sujoyku
on 7. July 2025, 23:23 by h1dd3ntrip7e
Another Sujoyku winner, great puzzle. Your 2* ranked puzzles are perfect difficulty for my current skill level
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Thank you for your comment, h1dd3ntrip7e! It is great to hear that you enjoy my 2 star puzzles.
Kind regards, sujoyku
on 25. May 2025, 18:49 by Crusader175
Cool new idea!
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Thank you, Crusader175! I am glad that you liked this new variant.
Kind regards, sujoyku
on 23. May 2025, 05:15 by Richard
That's an interesting new ruleset! Thanks for a very nice first example of it. :)
I have created my own version of this type that appears today as SVS #425.
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Thank you, Richard! I feel honoured that you picked my ruleset for the variant series. I cannot wait to try your puzzle. :)
Kind regards, sujoyku
on 16. April 2025, 22:51 by Lenivaya_Joppa
Thank you for this nice puzzle, dear sujoyku! :)
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Thank you for your kind comment, Lenivaya_Joppa!
on 11. April 2025, 17:35 by Syzygy
Fabulous new ruleset! Thank you very much for setting this! And I look forward to more in the future!!!
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You are much welcome, Syzygy, thank you for your comment! It is great to hear you like this new variant. Fun fact: I just read this while working on another one. It still needs to go through testing, but I am going to post it here soon.
Kind regards, sujoyku
on 10. April 2025, 14:27 by baku
Awesome puzzle for debutting the new ruleset. Took me a whole wrong turn to sink it in. Thanks for sharing
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You are much welcome, baku, thank you for your comment! I am glad you enjoyed this new ruleset.
Kind regards, sujoyku
on 9. April 2025, 14:52 by GeorgeTheToad2
What a great new ruleset. Not too difficult once you get your head tuned into the new ruleset. Thank you.
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You are much welcome, GeorgeTheToad2, thank you for your comment! It is great to hear you liked this new ruleset.
Kind regards, sujoyku
on 9. April 2025, 02:21 by Freegerator
Fun puzzle! Thank you!
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You are much welcome, Freegerator, thank you for your comment! I am glad you had fun solving.
Kind regards, sujoyku
on 8. April 2025, 23:23 by sorryimLate
A fun introduction to a nice ruleset. I didn't encounter any hurdles, there were always relatively easy deductions to be found. 1.5* Thanks!
**
You are much welcome, sorryimLate, thank you for commenting! I am glad you found this to be a fun introduction.
Kind regards, sujoyku
on 8. April 2025, 18:49 by nunc
Thanks for this lovely puzzle variant. I liked it a lot. At first, it was a bit intimidating, and I didn't know how to do it. But it all flowed very nicely, I enjoyed it.
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You are much welcome, nunc, thank you for your comment! I can very much relate: It is always challenging to get your head around a new ruleset. I am glad you enjoyed it.
Kind regards, sujoyku
on 8. April 2025, 18:08 by Franjo
Obwohl ich schon an etlichen Sandwiches geknabbert habe fand ich diese Variante nicht so zugänglich wie zuerst gedacht. Man muss gehörig umdenken. Aber ich fand sie auch Spitze! Heißen Dank für das tolle Puzzle.
**
Sehr gern geschehen, Franjo, vielen Dank für deinen Kommentar! Es freut mich, dass Dir die neue Variante Spaß gemacht hat.
Herzliche Grüße, sujoyku
on 8. April 2025, 16:41 by Ragna
Heyyy, tolle Idee! Das hat viel Spaß gemacht. Dankeschön. :-)
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Sehr gern geschehen, Ragna, vielen Dank für deinen Kommentar! Es freut mich, dass Dir die Idee gefallen hat.
Herzliche Grüße, sujoyku
on 8. April 2025, 15:27 by wuc
To me 2.5* since one hurdle was tricky about a third in the puzzle for me. Great idea. Great fun thx.
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You are much welcome, wuc, thank you for commenting! I think your difficulty estimate is fair and I have an idea what hurdle you are talking of. That was what nudged me towards 3 stars initially. It is great to hear that you liked the puzzle.
Kind regards, sujoyku
on 8. April 2025, 15:13 by Prince Myshkin
Loved it! Great new ruleset, sujouyku!
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Thank you for your comment, Prince Myshkin! I am glad you enjoyed the new ruleset.
Kind regards, sujoyku
on 8. April 2025, 13:37 by RockyRoer
Up to N is a nice summing ruleset - hope to see (or maybe make?) some more in the future!
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Thank you for your comment, RockyRoer! I am glad you enjoyed it. I am looking forward to setting more with the ruleset and, of course, would love to see you making some as well. :)
Kind regards, sujoyku
on 8. April 2025, 13:08 by Snookerfan
Fun puzzle, original ruleset. I think it is only 2 stars difficulty. Thank you
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You are much welcome, Snookerfan, thank you for your comment! I am glad you enjoyed this variant. Considering difficulty, I think most parts might be a little easier, but there were a few points in the mid-solve that made me uncomfortable with uploading it as 2 stars. Let us see where it lands. :)
Kind regards, sujoyku
