Latest Changes and Additions

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

Help! Need a new Solution Count program
Date Created: Saturday 11-May-2024
Last Updated: Saturday 11-May-2024


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

Y-Wing Strategy
Date Created: Friday 11-Apr-2008
Last Updated: Wednesday 8-May-2024
Sudoku Strategy. Y-Wings are simple three cell formations used to eliminate a candidate in a fourth cell. They are also the shortest versions of certain types of Alternating Inference Chains.

Daily Codewords
Date Created: Tuesday 30-Jan-2024
Last Updated: Thursday 18-Apr-2024
In Codewords numbers are substituted for letters in the crossword grid. Try to find the words where each number must be one particular letter.

Daily Kakuro
Date Created: Wednesday 25-Jan-2023
Last Updated: Tuesday 16-Apr-2024
Play or Print the Daily Kakuro Puzzle by Andrew Stuart

Introduction
Date Created: Monday 15-Apr-2024
Last Updated: Monday 15-Apr-2024
Sudoku Introduction - How many puzzles are there? Symmetries and clues

What's New
Date Created: Monday 17-Aug-2009
Last Updated: Monday 15-Apr-2024


Sudoku Solver for Android
Date Created: Saturday 15-Dec-2012
Last Updated: Tuesday 26-Mar-2024


Main Page
Date Created: Thursday 10-Apr-2008
Last Updated: Wednesday 13-Mar-2024
Strategies for Sudoku, Sudoku X, Killer Sudoku and Jigsaw Sudoku - and the home of logical puzzle maker Andrew Stuart

Daily Jigsaw Sudoku
Date Created: Thursday 8-Sep-2011
Last Updated: Thursday 29-Feb-2024
The Daily Jigsaw Sudoku puzzle by Andrew Stuart. This Jigsaw Sudoku can be completed directly on the web page - just enter numbers in the cells. Have fun!