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  • The basic idea...

    "The basic idea behind open source is very simple. When programmers on the Internet can read, redistribute, and modify the source for a piece of software, it evolves. People improve it, people adapt it, people fix bugs. And this can happen at a speed that, if one is used to the slow pace of conventional software development, seems astonishing...
    ...The Open Source pages exist to make this case to the commercial world."    - Introduction to Open Source -

    Details: HoloKen

    market download HoloKen
    Also known as Mathdoku or Kendoku, this KenKen game will test your mental arithmetic and challenge your mind. The goal is to fill in the entire grid with numbers while meeting the operation restrictions for each grid cage. Highlights include unlimited KenKen puzzles with different mathematical modes, different number entry modes (cell first or number first), undo functionality, statistics tracking and puzzle screenshots. For Sudoku lovers and puzzle gamers alike.


    * Auto-generated puzzles with unique solutions from a 4x4 grid to the ultimate 9x9 game
    * Need a challenge? Try the 'No operators' mode
    * Try out different mathematical restrictions: addition and subtraction only for the kids, or multiplication to test your prime factorisation
    * Track your statistics and try to beat your best times

    UI Design

    * Light and dark themes in full screen and landscape mode
    * Tablet support with stretchable layout

    Intuitive controls

    * Accessible game controls for New Game, Check and Undo
    * Start a new game even more quickly by setting a default grid size
    * Quick toggling of pen, pencil and eraser modes makes editing simpler
    * Quick toggling of number entry mode - either select cell first or number first
    * Pencil in possibilities in the grid, then long-press the Pen button to enter them all in one go
    * Undo button for removing multiple mistakes

    Hint system

    * Check progress through the Check button
    * Highlight duplicates or bad maths through Game Assistance settings
    * Auto-remove similar pencil marks once a number is penned in
    * Still need more help? Long-press on grid gives a context menu to show mistakes, reveal cell, reveal cage or show solution

    Saving and sharing games

    * Current game is immediately auto-saved, with an unlimited number of save slots
    * Like a puzzle? Save a screenshot and share it with a friend (external sdcard access required)

    Forked from MathDoku v1.9. Source code available under GPLv3. Translations welcome:

    Recent changes:
    Colors last modified cell
    Made solve popup larger
    Centered options menu
    Added menu to change mode on new game
    Changed small/large layout

    Stats tracking for average time and streaks.
    (** may have to reset statistics)
    Added auto-remove pencil marks in preferences.
    Added toggle for number entry mode - select cell first or select number first
    Fixed layout bug
    Requires additional read sd card permission for Android 4.1

    Content rating: Everyone

    Author: Tortuca Inc
    Version: 1.2
    Market link: com.tortuca.holoken
    Web site:

    Source code:
    Code license:
    Market downloads: 5,000-10,000
    Market rating: 4.7 / 5.0
    Category: Top:/Games/Board

    Added: 2013-07-16
    Updated: 0000-00-00
    Hits: 1226

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