The concept of the game is to fill a grid with the numbers 1-9 ensuring no repetition across rows or columns.

Players move to the empty cells in the grid and choose a number to go in that cell.

If players get stuck on a particular puzzle, a Hint system is available to get them back on track.

Play continues until the board is filled.

The Pencil icon allows the player to make pencil marks in the square to make notes and narrow down their choices. This isn’t counted as their answer.

The Eraser icon allows the player to rub out a previous answer if they later realise it’s not correct.

The Undo icon allows the player to undo one or more moves. This doesn’t roll back the game timer.

Difficulty

The game is available in four difficulty levels:

- Easy
- Medium
- Hard
- Extreme

In Beginner mode, players can make an unlimited amount of mistakes, compared to the normal mode where only a handful of errors can be made before its GAME OVER!

Challenges

The game will contain a Daily Challenge function where players can battle against other players all over the world to get the fastest time.

Progression

The game consists of a set number of levels in each difficulty level - completing all will win the game.

Leaderboards

The game also includes leaderboards to allow players to rank amongst their friends and the world. Leaderboards will be progression and time based.