or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the linex mode where left click+drag draws lines and right click marks X’s)
Theme: 3×3 Squares
Author/Opus: This is the 189th puzzle from our contributing puzzlemaster Prasanna Seshadri.
Rules: Standard Cave rules. Also, exactly one digit is a joker wherever it appears; each instance of it may be replaced by any nonzero number, like a “?” clue.
Difficulty: 3 stars
Time Standards (highlight to view): Grandmaster = 2:45, Master = 5:00, Expert = 10:00
Note: Follow this link for other classic Caves and this link for Cave variations. If you are new to this puzzle type, here are our easiest Cave Puzzles to get started on. More Cave puzzles can be found in Roger Barkan’s Colossal Cave Collection, in The Art of Puzzles, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.