description Araf Overview
Araf is a Japanese logic puzzle published by Nikoli in which the grid is divided into regions each containing exactly two given numbers, with the region's cell count strictly between those two values.
help Araf FAQ
How does the Nikoli puzzle Araf work?
In Araf, the grid is divided into regions, and each region contains exactly two given numbers. The number of cells in the region must be strictly between those two numbers.
What does strictly between mean in Araf?
If a region contains the numbers 3 and 7, its size must be 4, 5, or 6 cells. A region of 3 or 7 cells is not valid because the size must be strictly between the clues.
Who publishes Araf puzzles?
Araf is a Japanese logic puzzle published by Nikoli. Nikoli is also known for puzzles such as Sudoku, Kakuro, and Nurikabe.
What is the main solving challenge in Araf?
The solver must use the two clues in each region to determine the only possible range of region sizes. Overlapping possibilities and the requirement that every cell belongs to one region create the logic needed to complete the grid.
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