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Curious Cheetah

Shikaku

Background

This puzzle appears to be a Nikoli original.

Puzzle and Goal

An unsolved puzzle consists of a rectangular grid. Some of the cells contain numbers.
The goal is to mark of rectangular regions to satisfy the clues.
Shikaku initial statespacerShikaku solution

Rules

The solved grid must satisfy the following conditions:

Variants

Block-a-Pix (Conceptis) produces a picture.
In Kapetto, some squares are not included in regions.

Other Names

Divide by Box; Divide by Squares; Kapetto; Number Area; Rectangles; Shikaku ni kire; Sikaku; Zahlenareale

Playable Online