Latest Changes and Additions

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

What's New
Date Created: Monday 17-Aug-2009
Last Updated: Sunday 13-Oct-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.

Rule of 21
Date Created: Thursday 21-Apr-2011
Last Updated: Saturday 14-Sep-2024
Explains the Rule of 21 and how it applies to 6 x 6 KenKen puzzles.

Rectangle Elimination
Date Created: Saturday 7-Oct-2023
Last Updated: Thursday 22-Aug-2024
A new tough strategy by Ken Reek

6x6 Killer and Kendoku Cage Combinations
Date Created: Thursday 8-Aug-2024
Last Updated: Thursday 8-Aug-2024


Innies and Outies
Date Created: Sunday 13-Apr-2008
Last Updated: Monday 5-Aug-2024
Killer Sudoku Strategy. An essential strategy for Killer Sudoku. It looks at the cells in cages which all inside or outside a unit or group of units. Since a unit must add up to 45 (in 9x9 Killer) overlaps can help remove candidates.

x
Date Created: Sunday 21-Jul-2024
Last Updated: Sunday 21-Jul-2024