Curious Cheetah

Japanese Sums


The origin of this puzzle is not known. It is something of a cross between Nonograms and Sudoku.

Puzzle and Goal

An unsolved puzzle consists of a square grid. Along the top and left are numbered clues, resembling a blank Nonograms puzzle.
The goal is to place numbers in some cells, and paint others black, to satisfy the clues.


The solved grid must satisfy the following conditions:

Other Names

Japanische Summen; Summensuche; Zahleneinbaurätsel

Playable Online