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Free puzzles
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  • Slitherlink
  • Hitori
    Other sites

    Sudoku Xtra - my monthly magazine, including Kakuro

    Buy my book

    For children

    License puzzles
    License player


    Please see for extensive details and samples of puzzles and players by Dr Gareth Moore. uses a unique interactive play window, with a wide range of capabilities including:

    • Works in any modern browser without requiring any plugins (including Internet Explorer, Firefox and Safari)
    • Unique digit and grid resizing code - try it and see!
    • Unlimited full undo and redo - makes solving much less stressful, and means finger trouble doesn't ruin the game!
    • Fast entry by pushing number keys to enter big/small numbers; press again to toggle
    • Push 0, backspace or delete to clear a grid entry
    • Hit SPACE to toggle solution/pencil marks, or click on the relevant option
    • Double-clicking on a solo pencilmark number will place it as a solution digit (this is particularly handy with the auto-remove feature)
    • Show all possible fits for each clue run as you move around the grid
    • Dynamically update the clue totals to save you having to subtract placed numbers
    • Background saving via AJAX/XML/PHP/MySQL backend with live feedback
    • Intelligent placing of valid digits based on initial grid clues
    • Auto-add pencilmarks
    • Auto-prune small numbers
    • Check your solution (and point out empty cells too)
    • Show invalid moves
    • Show incorrect moves (also glows numbers in IE)
    • Generated from PHP using MySQL database backend
    • Arrow keys and TAB/SHIFT-TAB to move around
    • Or click to move around
    • Click on the entry cursor to remove it if you wish for aesthetic purposes
    • Reveal solution - and also highlights the entries you had wrong (try it - it uses small green numbers)
    • 'Please wait' message for clean screen whilst loading
    • Can cope with ANY grid dimensions
    • And more!
    If you wish to license the player module for use on your website or other outlet then please contact Gareth Moore at

    © / Gareth Moore 2005-15 - email dokakuro - licensing the player / publishing puzzles