or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a shading mode and a mode to mark edges with an X.)
Author/Opus: This is the 420th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard LITS rules.
Difficulty: 2 stars
Time Standards (highlight to view): Grandmaster = 1:15, Master = 2:15, Expert = 4:30
Note: Follow this link for more variations of LITS and this link for classic LITS. If you are new to this puzzle type, here are our easiest LITS to get started on. More LITS puzzles can be found in LOTS O’ LITS by Grant Fikes and Prasanna Seshadri, in The Art of Puzzles 2, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.