Welcome to Addoku

What is Addoku?

Addoku is a form of Sudoku, also known as Killer Sudoku and in Japan Samunamupure. The main difference to Sudoku is that you don't start with any numbers already filled in. Instead there are dotted blocks that have to add up to the displayed total. Using these you can solve the puzzle.

The objective is to fill the grid with numbers from 1 to 9 in a way that the following conditions are met:

Each 3x3 block contains each number exactly once. The sum of all numbers in a cage must match the small number printed into it. No number can appear more than once in a cage.

An Easy Addoku