Masyu (Short) Sudoku
(Published on 3. December 2025, 17:15 by SennyK)
Today I am happy to present a hybrid of masyu (short) and sudoku :-)
I hope you will enjoy and I would be really grateful for all the comments and ratings.
Normal sudoku rules apply.
Masyu/Parity: Draw a non-intersecting orthogonally connected loop through the centers of some cells that passes through every grey square and grey circle. The loop must turn on squares and travel straight through the cells on either side. The loop must go straight through circles. No straight-line loop segment can cross more than two cell borders. Loop acts as a parity line - neighbouring/adjacent digits along it alternate between odd and even.
Odd/Even: A digit in a grey square is even. A digit in a grey circle is odd.
V: Digits in cells joined by a V sum to 5. Not all Vs are given.
Sandwich: A clue outside the grid gives the sum of the digits appearing between the 1 and the 9 in that row/column.
Masyu (Short) Explanation:
You can see on the example above how masyu (short) works. In my puzzle, white circles are replaced by gray circles and black circles are replaced by gray squares. You can also try to play a big masyu (short) puzzle before you solve the sudoku, link here (author of both example and big puzzle is bakpao, puzzle came from the GAPP series in the CtC Fan Discord). Rules are also explained here, however those are for normal masyu, not the (short) variant.
The Erica Series:
Episodes: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
If you liked this puzzle, I recommend trying out my other puzzles:
Symmetrical Fan
Night Club
Cops & Robbers
Broken Flashlight in the Dark
Blown Fuses in Electrical Installation
Important Hour on the Clock
Let Me Introduce Myself
Positive Symmetry
Pretty Odd Shaded Area <- Recommended for you!
It's What You Do in the Dark That Puts You in the Light
What Was the Sum Again?
(+5)-Yang <- Recommended for you!
Disgroup Joints
Find It All
What the Fog?
10-Arrows
Negative 8 YY <- Recommended for you!
Why-Why? <- Recommended for you!
French Wrench
Tetromino Sudoku
Doppelgänger Killer 1-25
Solution code: Digits on the loop in the fifth (5th) row of the grid from left to right.
Comments
on 9. December 2025, 02:29 by Aronana
First time with this constraint, it was very fun!
on 5. December 2025, 19:59 by peterkp
Thanks for a nice puzzle. One suggestion: at the beginning I was confused about the rules. Where are the Masyu rules? Finally I realised they are there, but contained in a paragraph header that says "Parity" (and nothing else). I would split that paragraph into two, and give the Masyu and parity rules separately, each with a heading.
SK: Thank you for the comment! I did it this way in my Tetromino Sudoku puzzle and got the feedback that rules should be put all together and not separately, so I guess I just can't do it in a way that fits everyone. I will change name of paragrapf to "Masyu/Parity" though :-)
on 5. December 2025, 12:47 by Lizzy01
Very nice easy puzzle!
You might like these two of my puzzles involving sudoku and masyu too:
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000GNK
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000L8L
on 4. December 2025, 17:15 by DiMono
Masyu requires that the line turn in at least one of the neighbouring cells after passing through a white circle. You have not specified that in your rules. Given that the title includes Masyu, you may want to add some specificity here to address that difference.
SK: The rule you mention comes from Masyu, and this is Masyu (Short). In Masyu (Short) you cannot have a straight-line segment passing more than 2 cell borders, so line must turn on both sides after going through the white circle. It is in the rules.
DiMono: Ah, I missed that. Never mind :D
on 4. December 2025, 15:33 by googuee
Very nice and neat puzzle @SennyK! Thanks for sharing. Here is my take on Masyu / Sudoku. Give a try and let me know what you think. https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000PIX
SK: Thank you! I like your puzzle and I have rated it as very nice, but it still got 77%, I think this this because you required a hard deduction to solve it and gave it 1* difficulty estimation.
*** Thank you for your valuable feedback SK.
on 4. December 2025, 05:41 by Tank
One of the best puzzles. Definitely closer to a 2.5-3 star though for me. 38 minutes
on 4. December 2025, 00:03 by HeyItsErin
Brilliantly done Masyu variation with a remarkably fun Sudoku to follow. Thank you for reminding me of a puzzle I haven’t thought of in years! 1* if you’re at all familiar with Masyu but certainly 2* if you are new to it.
