or solve online (using our beta test of Penpa-Edit tools; use tab to switch between edgex mode where left click+drag draws lines and right click marks X’s, and a shading and number entry mode to mark/update the liar clues.)
Author/Opus: This is the 419th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Variation of Slitherlink rules. Exactly one clue in each row and column is incorrect and must represent another number.
Difficulty: 4.5 stars
Time Standards (highlight to view): Grandmaster = 8:45, Master = 13:30, Expert = 27:00
Note: Follow this link for classic Slitherlink and this link for Slitherlink variations. If you are new to this puzzle type, here are our easiest Slitherlink puzzles to get started on. More Slitherlink puzzles can be found in The Art of Puzzles, Slitherlink and Variations, and our beginner-friendly book Logic Puzzles 101.