or solve online (using our beta test of Penpa-Edit tools with a composite mode for line/edge drawing.)
Author/Opus: This is the 177th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Divide the grid into some regions formed of edge-adjacent squares. Each cell is part of one region, and each region should contain exactly two given numbers. Each region must have an area that is strictly between those numbers (This means, for two number clues A and B with A < B, the area C fulfills A < C < B).
Answer String: Enter the number of cells in each connected group (between bold lines) in the marked rows. For the example above, this is “34,121111,4111”.
Time Standards (highlight to view): Grandmaster = 0:45, Master = 1:15, Expert = 2:30
Note: Araf is a relatively new puzzle for us on GMPuzzles. Follow this link for other Araf.