Massive Masyudoku
(Published on 12. May 2026, 09:00 by Agent)
Masyu: In the left side grid, draw a non-intersecting loop through the centers of some cells that passes through every circle. The loop must turn on black circles and travel straight through the cells on either side. The loop must go straight through white circles, and turn in at least one of the cells on either side.
Region Sum Lines Sudoku: In the right side grid, place the digits 1 to 6 once each in every row, column, and 2x3 box. Box borders divide each blue line into segments with the same sum.
Interaction: Digits in the RSL Sudoku grid represent how many cells are visited by the loop in the corresponding 2x3 area of the Masyu. For example, if R1C1 of the RSL Sudoku grid is a 3, then exactly three of R1C1, R1C2, R1C3, R2C1, R2C2, R2C3 in the Masyu grid must be on the loop.
Setter's note: It is recommended to shade all cells on the loop one color, and all cells not on the loop another color.
Puzzle Links
Solution code: Column 5 of the Sudoku, from top to bottom. Then the number of turns of the loop in each of the first 4 rows of the Masyu, from top to bottom.
Comments
on 25. May 2026, 19:39 by nearestneighbour
Incredible. The puzzle that keeps on giving
on 18. May 2026, 03:58 by Andrewsarchus
Clues and interactions between grids work perfectly together. Fun puzzle!
on 16. May 2026, 17:42 by cyddrdrd
What a delicious snack!
on 14. May 2026, 20:13 by s1mn
Genuinely think this is the best puzzle I've ever done. So good.
on 14. May 2026, 20:10 by okchill
Amazing puzzle! Great fusion with puzzle elements that harmonize beautifully with each other.
on 14. May 2026, 04:52 by Aronana
Loving the megamasyudoku!
on 13. May 2026, 15:52 by Myreque
Amazing!
on 13. May 2026, 13:37 by Exigus
Super nice, felt scary at first but it wasn't hard. Thanks!
on 13. May 2026, 12:18 by Playmaker6174
Super fun and satisfying solve throughout, thanks for the lovely treat x)
on 13. May 2026, 01:13 by Pairot
Very enjoyable incremental progress! No giant breakthrough necessary.
on 13. May 2026, 01:03 by dzamie
I appreciate the setter's note. Not only was it helpful, but it made gradually filling in the masyu very satisfying!
on 12. May 2026, 21:51 by damasosos92
Lovely!
on 12. May 2026, 16:03 by Calvinball
Everything worked together so nicely, thanks Agent!
on 12. May 2026, 09:27 by Piatato
Simple yet very enjoyable, thanks!
