Change History
Version 2.2 (24th Dec 2009)
- Added toolbar:
- Toolbar can be shown or hidden by menu item under "Option" menu.
- Undo/Redo on toolbar show in their tooltips what will be undone/redone.
- Added image file support:
- Added ability to open an image file (.gif .png .jpg .bmp) and load puzzle via OCR (4x4-9x9 Classic Sudoku only).
- Added ability to drag and drop an image file (.gif .png .jpg .bmp) and load puzzle via OCR (4x4-9x9 Classic Sudoku only).
- Added ability to paste an image and load puzzle via OCR (4x4-9x9 Classic Sudoku only).
- Revamped methods for entering digits:
- Improved responsiveness to mouse clicks in conditions where they were ignored previously.
- Clicking a square selects it (yellow background).
- Numbers may be entered via keyboard, left mouse click on square, left mouse click on number wheel.
- Pencil marks may be entered via keyboard +digit, right mouse click on square, right mouse click on number wheel.
- Middle button promotes single candidate to single number.
- Middle button on a solved number shows/hides effect of the number on surrounding squares.
- Added number wheel:
- Use of number buttons is controlled by menu item under "Option" menu.
- Use of number wheel is controlled by menu item under "Option" menu.
- Number wheel is shown when new square is clicked with left/right mouse button or selected square is clicked with right mouse button.
- Number wheel is hidden when number is entered or mouse moves outside number wheel.
- Mousewheel changes selected number which will be entered with a left/right mouse click on the square.
- Windows 7 is supported.
- Undo/Redo now also works in puzzle entry mode.
- Added prompt to save a changed puzzle before it is removed.
- Added menu item to count unique solutions for a puzzle.
- Closing the program whilst in entry mode will result in it opening in entry mode.
- Congratulations dialog has "New Puzzle" button.
- Pencil marks are reinstated when a number is entered in a square and then replaced by a different number.
- Improved names of submenu items "Options -> Change Fonts" to better reflect the font use.
Version 2.1 (2nd Apr 2009)
- Added X-wing Sudoku solving rule to all puzzle types
- Added "law of leftovers" and related solving rules to irregular sudoku puzzles
- Reworked Killer/Killer X difficulty levels: easy -> unchanged, medium -> a little harder, hard -> moderately harder, expert -> much harder
- Added check of Killer/Killer X cages to "Auto remove pencil marks"
- Fixed bug where solution was not always available for Killer or Killer X Samurai and Multi-2 puzzles
Version 2.0a (26th Nov 2007)
- Fixed bug where "Auto remove pencil marks" did not work properly for squares in overlapping areas of Samurai and Multi-2 puzzles
- Fixed bug where "Auto remove pencil marks" did not work for Alphadoku/Alphadoku X
- Fixed bug where "Quick Help" gave "Invalid Command" error message
- (Thanks to John Young for reporting these bugs)
Version 2.0 (22nd Nov 2007)
- Added Samurai Sudoku (registered version only)
- Added Samurai Sudoku X (registered version only)
- Added Samurai Alphadoku (registered version only)
- Added Samurai Alphadoku X (registered version only)
- Added Samurai Killer Sudoku (registered version only)
- Added Samurai Killer Sudoku X (registered version only)
- Added new puzzle size 8x8 for all puzzle types (registered version only)
- Added another complex Killer/Killer X solving rule to help make more challenging puzzles
- Increased number of visible pencil marks from 6 to 12 and additional pencil marks are remembered rather than discarded
- Fixed bug which prevented one of the Killer/Kiler X solving rules from working
- Fixed bug where entering Killer/Killer X puzzles at non-100% zoom gave incorrect size cages
- Fixed bug where error prevented program starting with corrupted sudoku.ini file
Version 1.9b (22nd Aug 2007)
- Fixed bug in v1.9/v1.9a breaking generation of PDFs with more than 9 puzzles on a page
Version 1.9a (30th July 2007)
- Fixed bug in v1.9 where wrong box shapes in Irregular Sudoku PDF puzzles made them unsolvable
Version 1.9 (25th July 2007)
- Added Sudoku, Sudoku X, Killer, Killer X puzzles in new multi-2 puzzle size (registered version only)
Version 1.8 (14th June 2007)
- Congratulations message gives time taken to solve the puzzle
- Left-Button toggles square between entering/clearing pen entry
- When entering Killer Sudoku puzzles, number keys and clicking digit buttons can be used to set the cage sum
- Fixed bug giving error message when closing "Generate PDF" window whilst PDF is being generated
- Fixed bug where puzzle entry mode did not reflect puzzle type on initial startup
Version 1.7 (12 Sept 2006)
- Grid line colours are configurable
- Basic victory animation added (registered version only)
- Clear all pencil marks menu item added
- Middle-button clears pen/pencil entry from square
- Shift-Left-Button enters the value of a single pencil entry
- Double-Left-Button highlights all cells with the same value as clicked cell
- F2 keyboard shortcut for "New Game"
- F12 keyboard shortcut for "Check Squares" (registered version only)
- Previous "Apply colour to PDFs" value remembered on startup (registered version only)
- When entering Killer Sudoku puzzles, no longer need to hold down left mouse button whilst changing cage sum
- Sudoku X, Alphadoku X puzzle generation up to 10 times as fast as version 1.6a
- Killer Sudoku X puzzle generation 2-3 times as fast as version 1.6a
- Killer Sudoku Sum Calculator - contributed by Keith Vetter
Version 1.6a (13 Apr 2006)
- "Auto remove pencil marks" feature is now optional (registered version only)
- Fixed bug in "Auto remove pencil marks" with some Irregular Sudoku puzzles
- Fixed bug where some squares were coloured incorrectly after "solve"
- Fixed bug stopping numbers being entered in some squares after "solve" followed by "undo"
- Fixed regression producing too high a proportion of puzzles with 8 center squares visible
Version 1.6 (30 Mar 2006)
- Mac OSX (Darwin) PPC version released
- Added Irregular Sudoku puzzle type in sizes 4x4,6x6,9x9 (registered version only)
- Previous level, selected number and screen position remembered on startup (registered version only)
- Clear matching pencil marks when a square is assigned a number
Version 1.5a (22 Mar 2006)
- Fixed bug when saving Killer images with large zoom
- Fixed bug corrupting PDFs on some machines
Version 1.5 (09 Mar 2006)
- Linux version released (x86)
- Fonts are configurable
- Colours are configurable
- Previous font and colour settings remembered on startup (registered version only)
- Previous puzzle state remembered on startup (registered version only)
Version 1.4 (13 Feb 2006)
- Added Alphadoku puzzle type in sizes 4x4 to 25x25 (registered version only)
- Added Alphadoku X puzzle type in 4x4 to 16x16 (registered version only)
- Added Sudoku puzzle size: 20x20 (registered version only)
- Added Sudoku puzzle size: 25x25 (registered version only)
- Added Sudoku X puzzle size: 12x12 (registered version only)
- Added Sudoku X puzzle size: 16x16 (registered version only)
- Killer puzzles can now be entered into a blank grid and played/solved etc. (registered version only)
- Added <ctrl+Z> and <ctrl+Y> shortcuts for Undo and Redo
- Sudoku X and Killer Sudoku X puzzle generation speedup
- Links added to online registration and help web pages (help web page not yet written)
- Fixed bug in opening a generated PDF with a space in the file path
Version 1.3 (20 Jan 2006)
- Added Killer Sudoku puzzle type (registered version only)
- Added Killer Sudoku X puzzle type (registered version only)
- Puzzle generation 2-3 times as fast as version 1.2
- Improved GIF image quality for Sudoku X puzzles
- Generate PDF enabled for 4x4 size puzzles
- Generate PDF page icons indicate puzzle size
Version 1.2 (6 Dec 2005)
- Added Sudoku X puzzle type (registered version only)
- Buttons change colour to indicate completion of an individual number
- Autocheck Squares has been removed from menu and made into default behaviour
- Check menu option checks squares against the solution to detect mistakes (registered version only)
- Bug fix: Solve no longer changes initial starting squares if user has made mistakes in solving the puzzle
Version 1.1 (4 Nov 2005)
- Added puzzle size: 4x4
- Added puzzle size: 6x6 (registered version only)
- Added puzzle size: 12x12 (registered version only)
- Added puzzle size: 16x16 (registered version only)
- MouseWheel support for selecting number
- Zoom puzzle to view at 80%, 100%, 125%, 160%, 200%, 250%
- Puzzle generation 2-3 times as fast as version 1.0
- Bug fix: Saving a puzzle that was entered, rather than generated, now works
- i18n: Partial French translation - thanks to David Zolli
Version 1.0 (28 Sept 2005)
- Support for registration
- Further speedup of puzzle generation
- Additional difficulty level: (registered version only)
- Expert: 24-27 initial squares (2-fold symmetry only)
- Greatly reduced number of puzzles with 8 center squares visible
Version 0.9 (not released)
- Restructure menus
- Open/Save puzzles
- Restart puzzle
- Undo/Redo (unlimited undo in registered version only)
- Autocheck squares (registered version)
- Revamp of difficulty levels, previously puzzles had minimum of 30 initial squares
- Easy: 34-36 initial squares (simpler logic need to solve)
- Medium: 31-33 initial squares
- Hard: 28-30 initial squares
- Large speedup of puzzle generation
- Fix to a logic rule to enable harder puzzles
- Fix to remove error message on opening generated PDF
Version 0.8 (not released)
- Generate PDF page of 1-16 puzzles (registered version)
- Select numbers using keyboard
- Puzzles can no longer be created with 9 center squares visible
Version 0.7 (25 Feb 2005)
- Tcl/Tk only (no longer uses Img or Tile extensions)
- Available as a starkit
Version 0.6 (05 Jan 2005)
