Latest Changes and Additions

A quick list of the latest updates and additions to this site:

Jigsaw Sudoku Player
Date Created: Wednesday 20-Nov-2024
Last Updated: Wednesday 20-Nov-2024

Killer and KenKen String Definitions 2.0
Date Created: Thursday 9-May-2024
Last Updated: Wednesday 20-Nov-2024
A string definition encapsulating the clues, cages and progress of a Killer Sudoku puzzle with all the candidates.

Sudoku String Definitions 2.0
Date Created: Wednesday 18-Jan-2023
Last Updated: Wednesday 20-Nov-2024
A method of encapsulating the clues, solved cells and candidates of a Sudoku puzzle in a single string

Test Strings
Date Created: Wednesday 20-Nov-2024
Last Updated: Wednesday 20-Nov-2024


Sudoku X Player
Date Created: Saturday 16-Nov-2024
Last Updated: Saturday 16-Nov-2024


What's New
Date Created: Monday 17-Aug-2009
Last Updated: Saturday 16-Nov-2024


Avoidable Rectangles
Date Created: Sunday 13-Apr-2008
Last Updated: Friday 20-Sep-2024
Sudoku Strategy. Avoidable Rectangles is a strategy which, uniquely among all strategies, relies on clues and solved cells rather than potential candidates.

Main Page
Date Created: Thursday 10-Apr-2008
Last Updated: Monday 16-Sep-2024
Strategies for Sudoku, Sudoku X, Killer Sudoku and Jigsaw Sudoku - and the home of logical puzzle maker Andrew Stuart

Daily Sudoku X
Date Created: Monday 16-Sep-2024
Last Updated: Monday 16-Sep-2024


Sudoku X Strategies
Date Created: Saturday 12-Apr-2008
Last Updated: Monday 16-Sep-2024
Sudoku X Strategies. All Sudoku strategies are applicable to Sudoku X but the two diagonals which much also be unique can throw up some problems and these pitfalls are explained in this article.