Standard 9x9 Sudoku - 34 puzzles. Four levels of difficulty. Rules of Sudoku not provided here. Select a puzzle (on-screen arrows beside Level indicator). Click on a cell to select it. Click the on-screen (or off-screen) numbers to place one in the selected cell. Duplicates will be marked in Red. Click on Zero to clear the cell. On-screen "R" to reset/re-load puzzle. Click the "pencil notes" icon in the bottom-right area of the screen to enable Manual entry of "pencil notes". Once enabled, clicking on a number will enter/clear a note. Clicking on the "pencil note" icon again will enable/disable "auto-notes" mode. In that mode all notes will be created/erased based in placed numbers only. Disabling auto "pencil notes" mode will not erase existing notes. For using advanced solving techniques on difficult puzzles, you will most likely want auto-notes disabled. To continue cell entry mode, click on the "number" icon (looks like an "8"). Feedback welcome and encouraged!
100% pen. All puzzles created by Michael Mepham. Reported puzzle difficulty levels are as per the authors own ratings. (except: The rating "Fiendish" sounds a little dramatic to me, so I use "Hardest". LOL)
