Version 1.7.1 - 22 January 2008

  • Performance improvements
  • Improved Leopard compatibility
  • <Shift>-number enters possibles
  • Mac OS X 10.4 or later now required

 Version 1.7 - 31 July 2007

  • New statistics sidebar
  • Improved consistency of puzzle difficulty
  • Option to erase pencil marks from puzzle

 Version 1.6 - 30 November 2006

  • Resizable board
  • New Very Hard puzzle level
  • Additional keyboard shortcuts
  • Option to reset high scores/best times

 Version 1.5 - 10 July 2006

  • Symmetrical puzzle generation

 Version 1.4.2 - 3 July 2006

  • French localization

 Version 1.4.1 - 17 June 2006

  • German localization

 Version 1.4 - 12 May 2006

  • Improved puzzle generation, including a new Very Easy level
  • Ability to pause game
  • Option to automatically maintain list of possibles for squares
  • Universal binary runs natively on Mac Intel or PowerPC systems with Mac OS X 10.3.9 or later

 Version 1.3 - 19 April 2006

  • Keyboard navigation
  • Option to hide marked possibles from all but the highlighted cell

 Version 1.2 - 11 April 2006

  • Option to mark incorrect answers

 Version 1.1 - 27 February 2006

  • Customize your colors
  • Rotate board when you're stuck
  • Highlight one digit at a time
  • Optionally have possibles automatically marked at start of game

 Version 1.0 - 11 February 2006

  • Initial release