Slitherlink by Thomas Snyder
or solve online (using our beta test of Penpa-Edit tools in edgex mode where left click+drag draws lines and right click marks X’s)
Theme: Sum of Five Pentominoes (originally on the US round for the 2016 WPF Puzzle Grand Prix)
Author/Opus: This is the 243rd puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard Slitherlink rules.
Answer String: Enter the length in cells of each of the internal loop segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.
Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:15, Expert = 8:30
Solution: PDF
Note: Follow this link for other classic Slitherlink. If you are new to this puzzle type, here are our easiest Slitherlink puzzles to get started on.
17:16
12:29
quite hard but still fun