cZeus is an original puzzle game that effectively exercises logic, mental arithmetic, and notably improves mathematical fluency and problem-solving skills.

cZeus is suitable for any age group, from school age to adults who like to keep mentally active.

cZeus is a grid-based puzzle game, with different difficulty classes and each grid has a unique solution. The grid can be drawn in many shapes and sizes, but is most commonly rectangular.

cZeus has four simple rules and the aim is to find the answers to a set of mystery numbers by using the given clues.

The first 'Light Class' is an easy and intuitive way to learn the fundamental cZeus principles and can be revisited and replayed at any time. There are 14 levels within the Light Class and puzzles gradually get larger and more sophisticated. Plus, there are short tutorials at the beginning of each level that show the rules and how to play.

The next class, Mortal, is good for quick numeracy practice, and requires some logic and a basic understanding of cZeus rules. It is an entertaining alternative to traditional ways of refreshing times tables.

The need to apply logical thinking and a good understanding of cZeus rules really begins at Hero class and progressively gets harder. DemiGod is very challenging, while Olympian and Titan are mainly for wizards and serious puzzle players.

Unlike the other five classes, the Light class has no time limit to play, making it a great learning tool.

Principles of cZeus are illustrated here using this example puzzle.

The aim of cZeus game is to find all the missing mystery numbers by using the given clues and the rules.

These are the unknown numbers located in small square tiles.

Your mission is to reveal these by using clues and applying cZeus Rules.

In this example puzzle on a 2 by 2 grid, there are 4 mystery numbers.

However two of the mystery numbers, 1 & 2, are already given, and so only 2 mystery numbers remain to be solved.

Your mission is to reveal these by using clues and applying cZeus Rules.

In this example puzzle on a 2 by 2 grid, there are 4 mystery numbers.

However two of the mystery numbers, 1 & 2, are already given, and so only 2 mystery numbers remain to be solved.

These are **any two neighbouring **Mystery Numbers, connected vertically or horizontally.

A mystery pair always has a unique set of addition and multiplication values.

A mystery pair always has a unique set of addition and multiplication values.

e.g. mystery pair 1 and 4 is horizontally connected

e.g. mystery pair 4 and 4 is vertically connected

These are shown in the rectangles in between Mystery Pairs.

There are two types of Pair Clues:

Add clues are the sum of a mystery pair

Times clues are the multiplication of a mystery pair

A Mystery Pair always has a unique set of Pair Clues.

So, a Mystery Pair can be identified from its respective set of Pair Clues.

These are given on the central square tile surrounded by four Mystery Number tiles.

There are two types of Square Clues:

**e.g. is a square add clue
= **

**e.g. is a square times clue
= **

There are two types of Square Clues:

You are given few Pair Clues and Square Clues to identify these.

& and &

& and &

It can occur once or not at all in a puzzle!

Aim to spot it quickly to score more points!

If you think you have

more than one solution

you have probably broken Rule 2.

These videos may have older graphics as the game has been upgraded but the concept of solving the puzzles are same.

Try out these sample cZeus puzzles of various sizes.

The sample puzzles are in Adobe PDF format. You will need Adobe Reader to open and print these sample files. Visit Adobe to install free Adobe Reader software.

The sample puzzles are in Adobe PDF format. You will need Adobe Reader to open and print these sample files. Visit Adobe to install free Adobe Reader software.