This puzzle appears in "Challenge Your Brain Math & Logic Puzzles" (Dave Tuller & Michael Rios, Puzzle Wright Press).
Puzzle and Goal
An unsolved puzzle consists of a rectangular grid with numbered clues.
The goal is to create regions which satisfy the rules.
The solved grid must satisfy the following conditions:
Each region contains exactly two clues.
The clues represent the number of cells in the region.
Each region is a Jordan loop with no 2x2 areas.