Logic Masters Deutschland e.V.

Sudoku Variants Series (354) - Japanese Sums Sudoku

(Published on 5. January 2022, 00:00 by Richard)

For this Sudoku Variants Project I have planned to publish a different Sudoku variant every week. I will see how long it takes before I am running out of ideas.

Japanese Sums Sudoku
Apply classic sudoku rules.
Shade some cells such that clues outside the grid indicate the sums of digits in contiguous sets of unshaded cells in the corresponding row or column, where each question mark represents a number (1-45). The individual sets of unshaded cells have to be separated by at least one shaded cell.

Inspiration for this type comes from Tom Groot Kormelink.

Solve online in Penpa+ (thx SudokuExplorer!) or in Penpa+ with answer check. (Thx Dandelo!)

Solution code: Row 9, followed by column 1.

Last changed on on 6. January 2022, 13:14

Solved by Greg, Realshaggy, marcmees, kolot, Dandelo, r45, rcg, Jesper, Statistica, Lizzy01, lucasgren, azalozni, RockyRoer, Julianl, hpoddar08, kublai, Genomico, henrypijames, MathMan, samuella, ... juhish, NikolaZ, ch1983, snowyegret, EKBM, Frankenfruity, LordM, TomBradyLambeth, Nylimb, Angelo, zorant, Beedersen, Leonardo024, Carolin, Piatato, doyle524, Nickyo, Alfred, Luaryo, Calvinball
Full list

Comments

on 3. February 2024, 00:47 by Calvinball
Penpa link didn't work for me so I ported it over to Sudokupad.

https://sudokupad.app/o2h6tp9osn

Wonderful puzzle btw!

on 28. June 2022, 06:11 by Montinox
Loved this! Thank you

on 3. April 2022, 13:05 by skywalker
Really nice!!!

on 18. February 2022, 15:11 by Hecspeed
One of my favorite variants and a very enjoyable puzzle

on 6. January 2022, 18:34 by Rollo
Very nice variant. And my puzzle number 4000 in this portal :-). Thank you Richard and Tom!

on 6. January 2022, 13:14 by Richard
Added another link for online solving. Thx Dandelo!

on 5. January 2022, 17:24 by Lizzy01
Very nice!

on 5. January 2022, 15:28 by Genomico
Beautiful construction Richard! I also love this variant. I got the idea from the WSC 2017 in India btw, so those credits go to someone else, but thank you for the reference :)

on 5. January 2022, 13:25 by RockyRoer
I can never turn away from a Japanese Sums sudoku -- and this was nice smooth solve.

on 5. January 2022, 11:53 by Jesper
Excellent, thanks!

on 5. January 2022, 08:12 by Dandelo
Very nice!

Here's a penpa-link with answer check (use green, blue or red numbers): https://git.io/JSy1h

on 5. January 2022, 06:06 by Richard
Added link for online solving. Thx SudokuExplorer!

on 5. January 2022, 00:43 by SudokuExplorer
Here's a Penpa+ link: https://git.io/JSDBS

I look forward to trying this later :-)

Difficulty:3
Rating:96 %
Solved:98 times
Observed:5 times
ID:0008Q3

Puzzle variant Online solving tool

Enter solution

Solution code:

Login