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The first iteration of the logo
The first iteration of the logo

THE HISTORY OF ONE SUDOKU

There is far more than one Sudoku app in the world. Nevertheless, the development of One Sudoku as a hobby project started for a specific reason: no other app offered all the Sudoku variants its creator liked to play.

Prototype of the One Sudoku App Logo
Prototype of the One Sudoku App Logo

First steps

In 2019, the first prototype of the Sudoku generator was created, which is still the basis for all puzzles that can be played in the app. In addition, the first designs were created for the iOS app, which is being developed in the Swift programming language.

In this, the Sudoku generator uses the dancing links algorithm to ensure that each Sudoku has only one solution. In addition, various other algorithms are used, for example, to create a unique playing area for each Chaos Sudoku.

Prototype of the One Sudoku App Logo
Prototype of the One Sudoku App Logo

First steps

In 2019, the first prototype of the Sudoku generator was created, which is still the basis for all puzzles that can be played in the app. In addition, the first designs were created for the iOS app, which is being developed in the Swift programming language.

In this, the Sudoku generator uses the dancing links algorithm to ensure that each Sudoku has only one solution. In addition, various other algorithms are used, for example, to create a unique playing area for each Chaos Sudoku.

Design of the interface for phones.
Design of the interface for phones.
Design of the interface for phones.
Design of the interface for phones.

Design of the interface for phones.

Design of the interface for pads.
Design of the interface for pads.
Design of the interface for pads.
Design of the interface for pads.

Design of the interface for pads.

The ceremonial first successfully created Sudoku.
The ceremonial first successfully created Sudoku.

The ceremonial first successfully created Sudoku.

One Sudoku 1.0 App Logo
One Sudoku 1.0 App Logo

Version 1.0

On February 1, 2020, One Sudoku was released in the App Store. The first version allowed playing 9 different Sudoku variants.

One Sudoku 1.0 App Logo
One Sudoku 1.0 App Logo

Version 1.0

On February 1, 2020, One Sudoku was released in the App Store. The first version allowed playing 9 different Sudoku variants.

Jigsaw Sudoku and Number Pad.
Jigsaw Sudoku and Number Pad.
Jigsaw Sudoku and Number Pad.
Jigsaw Sudoku and Number Pad.

Jigsaw Sudoku and Number Pad.

The main menu in Chinese language.
The main menu in Chinese language.
The main menu in Chinese language.
The main menu in Chinese language.

The main menu in Chinese language.

A successfully solved Sudoku.
A successfully solved Sudoku.
A successfully solved Sudoku.
A successfully solved Sudoku.

A successfully solved Sudoku.

Classic Sudoku in 9x9.
Classic Sudoku in 9x9.
Classic Sudoku in 9x9.
Classic Sudoku in 9x9.

Classic Sudoku in 9x9.

Version 1.1

With version 1.1 One Sudoku got support for leaderboards, user profiles and achievements. The version therefore had the internal project name LAP. This version was released in April 2020.

Version 1.1

With version 1.1 One Sudoku got support for leaderboards, user profiles and achievements. The version therefore had the internal project name LAP. This version was released in April 2020.

The leaderboards during development.
The leaderboards during development.
The leaderboards during development.
The leaderboards during development.

The leaderboards during development.

The new unlockable achievements.
The new unlockable achievements.
The new unlockable achievements.
The new unlockable achievements.

The new unlockable achievements.

The first weekly championship in closed session.
The first weekly championship in closed session.
The first weekly championship in closed session.
The first weekly championship in closed session.

The first weekly championship in closed session.

One Sudoku 2.0 App Logo
One Sudoku 2.0 App Logo

Version 2.0

In addition to a modernized user interface, the options for entering numbers have been expanded in version 2.0. In addition to the number wheel and number field already known from version 1.0, buttons for the numbers on the bottom were introduced.

The release of the version took place in May 2021.

One Sudoku 2.0 App Logo
One Sudoku 2.0 App Logo

Version 2.0

In addition to a modernized user interface, the options for entering numbers have been expanded in version 2.0. In addition to the number wheel and number field already known from version 1.0, buttons for the numbers on the bottom were introduced.

The release of the version took place in May 2021.

New number buttons and settings directly in the game.
New number buttons and settings directly in the game.
New number buttons and settings directly in the game.
New number buttons and settings directly in the game.

New number buttons and settings directly in the game.

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Jigsaw Sudoku with numbers already revealed.
Jigsaw Sudoku with numbers already revealed.
Jigsaw Sudoku with numbers already revealed.
Jigsaw Sudoku with numbers already revealed.

Jigsaw Sudoku with numbers already revealed.

One Sudoku 3.0 App Logo
One Sudoku 3.0 App Logo

Version 3.0

The latest version of One Sudoku was released in March 2023.

In this version, the internal structure of the app was completely revised. Among other things, this allows the use of individual design files for each game field. In addition, the complete user interface has been reworked. Note input has been improved and there is support for regular special events, which can include symbols instead of numbers.

Also, version 3.0 introduced Kropki Sudoku and Kendoku as new variants.

One Sudoku 3.0 App Logo
One Sudoku 3.0 App Logo

Version 3.0

The latest version of One Sudoku was released in March 2023.

In this version, the internal structure of the app was completely revised. Among other things, this allows the use of individual design files for each game field. In addition, the complete user interface has been reworked. Note input has been improved and there is support for regular special events, which can include symbols instead of numbers.

Also, version 3.0 introduced Kropki Sudoku and Kendoku as new variants.

Revised design including the map for the new variant Kropki Sudoku.
Revised design including the map for the new variant Kropki Sudoku.
Revised design including the map for the new variant Kropki Sudoku.
Revised design including the map for the new variant Kropki Sudoku.

Revised design including the map for the new variant Kropki Sudoku.

A playing field with individual design during the Halloween event
A playing field with individual design during the Halloween event
A playing field with individual design during the Halloween event
A playing field with individual design during the Halloween event

A playing field with individual design during the Halloween event

Special events during the development phase of One Sudoku 3.0.
Special events during the development phase of One Sudoku 3.0.
Special events during the development phase of One Sudoku 3.0.
Special events during the development phase of One Sudoku 3.0.

Special events during the development phase of One Sudoku 3.0.

One Sudoku. A Sudoku App for your iPhone, iPad, and Mac.

One Sudoku App

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