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The Sideboard

The digital Escape Room

In a dark corner you find old dusty books and an unsolved Sudoku puzzle. Under the puzzle there is written in barely legible writing:

Orange + Blue – Green = Black!

How does a Sudoku work?

A Sudoku is a logic puzzle. The goal of the puzzle is to arrange the numbers in such a way that in each row, each column and each 3×3 block the numbers from 1 to 9 appear exactly once. The already entered numbers are the guidelines you have to follow.

Look for a detailed tutorial for Sudokus in the internet!

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Hint Sudoku

Try inserting 5s, 6s and 7s first. The green circle must be an 8.

Are you still stuck here? Send us an email to, we’ll help you as quickly as possible.