Latest Changes and Additions

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

Rectangle Elimination
Date Created: Saturday 7-Oct-2023
Last Updated: Thursday 30-Oct-2025
A new tough strategy by Ken Reek

Daily Kakuro
Date Created: Wednesday 25-Jan-2023
Last Updated: Tuesday 28-Oct-2025
Play or Print the Daily Kakuro Puzzle by Andrew Stuart

Daily Sudoku X
Date Created: Monday 16-Sep-2024
Last Updated: Tuesday 28-Oct-2025


What's New
Date Created: Monday 17-Aug-2009
Last Updated: Tuesday 28-Oct-2025


Cage Unit Overlap
Date Created: Tuesday 22-Mar-2011
Last Updated: Monday 27-Oct-2025
Killer Sudoku Strategy. Cage Unit Overlap looks at the intersection of a cage with a row, column or box to find eliminations.

Triple Pointing Pairs
Date Created: Sunday 26-Oct-2025
Last Updated: Monday 27-Oct-2025


Cell Forcing Chains
Date Created: Saturday 6-Mar-2010
Last Updated: Saturday 18-Oct-2025
Sudoku Strategy. This is a Forcing Chains Strategy. It finds eliminations by comparing the results of two chains starting with a bi-value cell assuming either candidate in the cell is turned on.

Unit Forcing Chains
Date Created: Saturday 6-Mar-2010
Last Updated: Saturday 18-Oct-2025
Sudoku Strategy. This is a Forcing Chains Strategy. It finds eliminations by comparing the results of chains starting with all candidates N in a unit and assuming any of them are turned on.

Grading Puzzles
Date Created: Tuesday 30-Sep-2025
Last Updated: Monday 6-Oct-2025


BUG
Date Created: Friday 11-Apr-2008
Last Updated: Sunday 28-Sep-2025
Sudoku Strategy. BUG stands for Bi-Value Universal Grave. It is a formation that relies on the uniqueness of the solution and an array of bi-value cells.