Version 10.1


New Features

1. Significant enhancement to the Rows and Columns analysis (aka 'X-Wing) to include 'finned' variants (aka 'Finned X-Wing' and 'Sushimi Finned X-Wing'). Full details may be seen here.

2. Check for latest version at start-up. This check (which is also still available from the Help menu) is now performed at start-up. The start-up check can be inhibited in the Options menu.

3. Virtual Puzzle Books that 'grow' can now download Killer SuDokus as well as standard SuDokus. For example, the 'Cracking The Cryptic' Virtual Puzzle Book now includes Killer SuDokus - more details here.

Bug Fixes

1. Quad Pairs analysis (aka 'Unique Rectangles') would only spot scenarios with just one extra Possible in the 4th Square of the pattern. In fact, the logic works for any number of extra Possibles in the 4th Square. This has been fixed and Quad Pairs should recognise a lot more scenarios. Full details may be seen here.

2. Minor improvement to the GUI: when using any key ( delete a Solution or populate a Square with Possibles), the re-drawing of the dark blue outline square was not always working correctly.

Version 10.0


New Features

1. Additional shortcut keys have been added ('P' was already a shortcut key for populating a single Square with all possible solutions) so the full list of shortcut keys is:

P - Populate a single Square with all possible solutions.
C - Clear a single Square of all possible solutions (ie clear all Little numbers, or "pencil marks", from that Square).
B - Toggles between Big Numbers and Little Numbers
Right Mouse - Toggles between Big Numbers and Little Numbers

2. 'Open' added to File menu. This opens List View. Does exactly the same as selecting 'List View' from the Tools menu, but added following several requests. Also added separate buttons on the Toolbar for 'Virtual Puzzle Book' and 'List View'.

3. Support for a new Puzzle Book Cracking The Cryptic. This Puzzle Book is FREE and features SuDokus from the YouTube channel of the same name, see here. Many of the videos on this channel feature Duncan's SuDoku Solver - so a great place to see it in action!
This Puzzle Book grows! New puzzles will be regularly added and can be downloaded for free - full details here.

Bug Fixes

1. In Killer mode, the Save button (and Save option in the File menu) did not appear unless a name was first typed into the name box.

2. With Microsoft Windows 10, the File Browser (the magnifying glass button in Virtual Puzzle Book and List View) stopped operating correctly and did not allow browsing of folders or creation of new folders. A new setting ('before Windows 10) has been added in the Options menu. It should be unchecked for running in Windows 10 and checked for all earlier versions of Windows. Some very early versions of Windows 10 may also require this option to be checked to get correct operation of the File Browser.

3. In Solve Mode, gross Mistakes (Square is coloured red) were showing up even if the 'Mistakes' checkbox was not checked.

4. In List View, if the first line of the comments was too long, it could overflow into the 'Required Analyses'. Now truncated to fit into the comments area.

Version 9.0


New Features

1. In Solve Mode, when clicking on the Clue Button, the Help Detail box and the '?' cursor turn on automatically and the Clue Button turns red to indicate 'Clue Mode'. They will turn off automatically when clicking on the grid to return to Solve Mode (or when entering Solve Mode from any other Mode). The '?' button still allows the Help Detail box to be turned on and off manually.

2. Support added for a new type of Virtual Puzzle Book - MegaBooks. These are a collection of ALL the SuDokus published on the website during the year. The collection is updated with all the SuDokus published to-date at the click of a button.
More information is here.

3. For Killer SuDokus, several new enhancements have been made to the 'Impossible Combinations' analysis to tackle some particularly tough puzzles. Full details are here.

Bug Fixes

1. Using the "Poss" button to populate the whole grid with possible solutions, or using the 'P' key to populate a single Square with possible solutions, did not start the timer if elapsed time was zero.

2. A Solution in a Square did not always remove Possibles of the same value elsewhere within the same Group.

3. Going into List View (or Virtual Puzzle Book) and then exiting without loading a SuDoku, caused STEP mode to advance one step.

4. In List View, deleting a folder that contained files other than SuDoku files caused a crash.

Version 8.4


New Features

1. Picture SuDokus are now displayed in a different way. Previously, either the picture or the SuDoku grid were displayed depending on if the mouse was hovering over the grid. This caused the picture to flicker on and off in a distracting way. Now, the picture can be displayed (or not) under user control. Also the picture can be faded in and out to show both picture and grid overlayed.

Bug Fixes

1. In List View, SuDoku names could be truncated to 25 characters when the mouse cursor hovered over them.

2. In Capture Mode for Killer SuDokus, there were some pixels not being correctly re-drawn when the blue Group outline moved away.

3. In Capture Mode for Killer SuDokus, the blue Group outline was not drawing in the left column and the top row when the cursor was brought in from off-grid.

4. When loading a SuDoku, a 'PAUSED' message would show even if elapsed time was zero. Now, if a SuDoku is reset to the start position, and the SuDoku is saved without starting it, the 'PAUSED' message will not show when that SuDoku is re-loaded.

5. Returning from List View or Virtual Puzzle Book without selecting a SuDoku could cause the cursor not to display the blue highlight square in Capture and Solve modes.

6. When downloading a Killer SuDoku from the website, the message "The new SuDoku has been downloaded" would display even if a Killer SuDoku had not been downloaded, due to the Killer Solver feature not being licensed and the demo period of 30 days having expired.

7. Saving a Picture SuDoku that had been downloaded from the website, sometimes caused it to become unlicensed.