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A quick list of the latest updates and additions to this site:
What's New
Date Created: Monday 17-Aug-2009
Last Updated: Wednesday 22-May-2013
Sudoku Solver - Version History
Date Created: Sunday 13-Apr-2008
Last Updated: Tuesday 21-May-2013
Nishio Forcing Chains
Date Created: Monday 16-Jul-2012
Last Updated: Monday 20-May-2013
Nishio Forcing Chains
Cell Forcing Chains
Date Created: Saturday 6-Mar-2010
Last Updated: Monday 20-May-2013
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.
Digit Forcing Chains
Date Created: Wednesday 17-Mar-2010
Last Updated: Monday 20-May-2013
Sudoku Strategy. This is the start of a family of strategies called Forcing Chains. It finds eliminations by comparing the results of two chains starting with a single digit - that digit being on or off.
Killer Combinations
Date Created: Saturday 12-Apr-2008
Last Updated: Saturday 18-May-2013
Killer Sudoku Strategy. Killer Sudoku gives clues which are the sums of the solutions in defined cages. The combinations of possible cages based on the clue are listed here.
3D Medusa
Date Created: Saturday 6-Mar-2010
Last Updated: Friday 17-May-2013
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.
WXYZ-Wing
Date Created: Friday 11-Apr-2008
Last Updated: Saturday 13-Apr-2013
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.
Sudoku Solver for Android - Build Log
Date Created: Tuesday 29-Jan-2013
Last Updated: Sunday 3-Mar-2013
Sudoku Solver for Android
Date Created: Saturday 15-Dec-2012
Last Updated: Sunday 3-Mar-2013