Shifter Lines 120: Masyu
(Published on 7. March 2026, 15:00 by gUBBLOR)
I've been doing a bunch of masyu recently, and I decided to mix it with some sudoku. The previous puzzle in the series:
Shifter Lines 119: Deconstruction
All my series:
Equality Cages
EquaLite Cages
Shifter Lines
Shifter Dots
Rules:
Normal Sudoku rules apply. Place the digits 1 through 9 in each empty cell. Digits must not repeat within the same row, column, or box.
Masyu: Draw a single non-intersecting loop through the centers of some cells that passes through every circle clue. The loop must turn on black circles and pass 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.
Shifter lines: The entire masyu loop is a shifter line. Adjacent digits within the same box on a shifter line share both parity (even/odd) AND polarity (low/high). Whenever the line enters a new box either the parity OR the polarity shifts, never both. Shifter lines can never have 5 on it. Digits may repeat on the line.
Kropki dots: A white dot between cells indicates cells with consecutive values. Not all dots are shown.
XV: Adjacent cells connected with an X must sum to 10. Adjacent cells connected with a V must sum to 5. Not all X's or V's are shown.
Cells connected by a dot or an X or a V are either both off the loop, or both are on the loop and the loop goes through the constraint to the next cell. When the loop goes through a constraint this act as a box border for shifter line purposes.
Solve here:
Sudokupad
Video featuring the puzzle:
Puzzle Patzer
Solution code: A completion message with the solution code will be available when the puzzle has been solved on Sudokupad!
Last changed on on 19. March 2026, 17:56
Solved by cornish-john, isajo4002, SKORP17, NEWS, fahmisack, data_free, Sherif, Elliott810, SPring, Jasura, sehringdipity, EFlatMinor, PuzzlePatzer, widjo, tryote, crosslegged, jkuo7
Comments
on 19. March 2026, 17:56 by gUBBLOR
Added video link to puzzle being solved
on 17. March 2026, 22:32 by tryote
Very nice
on 10. March 2026, 21:27 by PuzzlePatzer
Another great one - thanks for sharing!
on 8. March 2026, 11:05 by Elliott810
Absolutely brilliant (and hard) puzzle! Take a bow! Thank you:)