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: Friday 22-Aug-2025


WXYZ-Wing
Date Created: Friday 11-Apr-2008
Last Updated: Sunday 17-Aug-2025
Sudoku Strategy. WXYZ-Wings extend XYZ-Wings to four numbers and are four cell formations used to eliminate candidate elsewhere. They use a common candidate method to find contradictions.

3D Medusa
Date Created: Saturday 6-Mar-2010
Last Updated: Thursday 14-Aug-2025
Sudoku Strategy. 3D Medusa takes chain building into all the dimensions of the Sudoku board. That is, by making links among rows, columns and boxes - and in bi-value cells. Many types of eliminations are possible with this network approach.

XY-Chains
Date Created: Friday 11-Apr-2008
Last Updated: Wednesday 13-Aug-2025
Sudoku Strategy. XY-Chains are the work-horse of chaining strategies and are very easy to use when the board contains many bi-value cells. When the start and end cells can see a common candidate eliminations can be made.

Donations
Date Created: Saturday 12-Apr-2008
Last Updated: Saturday 26-Jul-2025


Test Strings
Date Created: Wednesday 20-Nov-2024
Last Updated: Saturday 19-Jul-2025


Daily Binairo Plus (6x6)
Date Created: Monday 14-Jul-2025
Last Updated: Monday 14-Jul-2025


Daily Binairo Plus (8x8)
Date Created: Monday 14-Jul-2025
Last Updated: Monday 14-Jul-2025


Daily Binairo (8x8)
Date Created: Monday 14-Jul-2025
Last Updated: Monday 14-Jul-2025


Daily Binairo
Date Created: Monday 14-Jul-2025
Last Updated: Monday 14-Jul-2025
Binario - a simple logical game of two colours