To upgrade from an earlier version, simply download and run the setup kit. Your existing registration key will still be valid, and you do not need to uninstall the previous version first. (If you do choose to uninstall a previous version, first make a note of your registration details from the About box (Help -> About) as you'll need this after you re-install.)

Recent Changes

V5.1 2016-06-26

  • Restore the functionality of the A1-I9 coordinate system. This has probably been broken since v3.5, released in September 2009.
  • Fixed the display of the coloured cells shown in the hint function for when a full chain contradiction is found when using the colouring solving technique.

V5.0 2016-05-05

  • Ensure the pencil marks are cleared when a solution number is entered into a cell. This doesn't effect the display to the user, nor the automatic solver, but previously, pencil marks could be saved in the .SDK file for a cell that had a solution number. This no longer happens.
What People Say

You have done a great job ... I appreciate well written software and I feel this is a very well thought out program.
Jerald F Jones, Minnesota
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