About

Simsu is a basic Sudoku game. You can switch between filling in notes (pencil mode), or filling in answers (pen mode). To make it easier to see where to place numbers, you can highlight all instances of a number. You can also check your answers for correctness while playing. The game stores your current notes and answers, so that you can pick up where you left off the next time you play.

Screenshots

A sample game

A sample game in the widescreen layout

Release Notes

  • Changes in version 1.4.3
    • Released on January 16, 2024
    • Replaced deprecated code
    • Translation updates: Portuguese
  • Changes in version 1.4.2
    • Released on January 10, 2023
    • Added portable mode
    • Improved Linux deployment
    • Replaced deprecated code
  • Changes in version 1.4.1
    • Released on May 3, 2022
    • Switched to Qt 6
    • Translation updates: Dutch, Telugu
  • Changes in version 1.4.0
    • Released on June 13, 2021
    • Added difficulty ratings
    • Added getting hints
    • Added optional automatic pencil marks
    • Added playing puzzles entered by player
    • Added printing puzzles
    • Added restarting puzzles
    • Added support for Qt 6
    • Improved new game interface
    • Improved window spacing
    • Refactored code
    • Removed XPM icon
    • Translation updates: Bulgarian, Lithuanian, Romanian, Russian, Telugu
  • Changes in version 1.3.9
    • Released on April 20, 2020
    • FIXED: Did not load locales with underscores
    • Improved Windows deployment
    • Replaced deprecated code
  • Changes in version 1.3.8
    • Released on August 7, 2019
    • FIXED: Window icon didn't work in Wayland
    • Improved loading locales
    • Improved Windows deployment
    • Replaced deprecated code
  • Changes in version 1.3.7
    • Released on July 20, 2018
    • FIXED: Automatic high DPI support
  • Changes in version 1.3.6
    • Released on May 29, 2018
    • Replaced deprecated code
    • Extra warnings only shown in debug build
    • Improved Linux deployment
    • Improved macOS deployment
    • Improved Windows deployment
    • Translation updates: Chinese, Chinese (Taiwan), Italian, Portuguese
  • Changes in version 1.3.5
    • Released on December 28, 2017
    • FIXED: Could not compile with Qt 5.10
  • Changes in version 1.3.4
    • Released on August 5, 2017
    • FIXED: Did not always install translations in Linux
    • Translation updates: Chinese (Taiwan)
  • Changes in version 1.3.3
    • Released on October 8, 2016
    • Generate binary translations at build time
    • FIXED: Was not properly loading Qt translations
    • FIXED: Compiler warned about signed interger overflow
    • Translation updates: Dutch, Lithuanian
  • Changes in version 1.3.2
    • Released on January 30, 2016
    • FIXED: Switching keys was slow
    • FIXED: Moving focus betweens cells was slow
    • FIXED: Success message was not high DPI
    • Translation updates: Bulgarian, Catalan, German, Greek, Polish, Portuguese, Spanish
  • Changes in version 1.3.1
    • Released on January 25, 2015
    • FIXED: Application layout did not respect RTL languages
    • FIXED: All new games used the same seed in Windows
    • Translation updates: Lithuanian
  • Changes in version 1.3.0
    • Released on January 23, 2015
    • Added support for high DPI displays
    • Switched to C++11 random classes
    • Removed support for Qt 4
    • Translation updates: Bulgarian, Czech, German, Greek, French, Lithuanian, Malay, Polish, Romanian, Spanish (Chile), Turkish
  • Changes in version 1.2.3
    • Released on February 14, 2013
    • Hungarian translation added by Tóth Attila
    • Romanian translation added by Jaff (Oprea Nicolae)
    • Added support for Qt 5
  • Changes in version 1.2.2
    • Released on January 25, 2012
    • Highlights text when all cells are found
    • Highlights column and row of current cell
    • New program icon
    • Russian translation added by Alexander Vorobyev
    • Added Catalan translation
    • Added French translation
    • Added Greek translation
    • Added Spanish translation
    • Added Spansih (Chile) translation
    • Added Ukranian translation
  • Changes in version 1.2.1
    • Released on March 30, 2009
    • Czech translation added by Pavel Fric
  • Changes in version 1.2.0
    • Released on March 28, 2009
    • Added multiple types of symmetry
    • Added an easier solving algorithm
    • Added a widescreen layout
  • Changes in version 1.1.0
    • Released on February 27, 2009
    • Added support for undo and redo
    • Added support for highlighting current number
    • Added number entry buttons
    • Added selectable givens
  • Changes in version 1.0.0
    • Released on January 18, 2009
    • New project