Heidi's Infinite Sudoku - Chrome Web Store
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Heidi's Infinite Sudoku


280 ratings

9,000 users
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Sudoku for puzzle lovers. Billions of accurately rated puzzles, gentle hints, save files, colors, notes, touch, keyboard shortcuts.

NEW updated version for 2015: a new endless list of beautifully symmetric boards, a new highly readable handwriting font, and a bit more challenging levels. Heidi's Sudoku is different from other sudoku programs because it gives good hints. It can gently guide you out of a jam without giving away the whole puzzle. The Hint button highlights a few squares to concentrate on. Things are not totally given away, but if you hold down ctrl when clicking Hint, you will get more of an explicit hint. You can select Colors to see which parts of the board should be easiest to figure out first, and which parts are really hard and should be left to the end. Don't give up after you have hit a dead end in a puzzle. Use the Check button for a tip on whether you've made a mistake, and hold ctrl to see where it might be. More features: Switch between puzzles at your leisure. Learn to see tricks like naked pairs, hidden sets, xwing, ywing, swordfish, etc. Use mouse input or keyboard shortcuts. Tap with a tablet or touchscreen laptop. Pencil in notes, colors, or highlighting. Ratings grade actual difficulty. Save games or share with short urls. Track your speed with an optional timer. Enter and grade custom Sudoku puzzles. Heidi's Infinite Sudoku is inspired by Heidi and David's favorite way to play Sudoku: we love puzzling together and sharing really clever hints. This is a local HTML 5 app that works offline.

3.8 out of 5280 ratings

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Howard CunninghamNov 11, 2022

No adds. Supports note marks. Verifies guesses to ease frustration. Works with touchscreen or mouse. Contrast could be better on my old ASUS Windows laptop - converted to Chrome OS, but that is a nit.

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Al PopcornJan 28, 2020

Works well with many puzzle to choose from. The soft hints are very good. Thanks

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michael moranJan 21, 2020

Best sudoku game I have used but it is aggravating to be sent back to puzzle number one or two when you are trying to advance to number three hundred and something.

1 out of 2 found this helpful


  • Version
  • Updated
    June 13, 2015
  • Size
  • Languages
  • Developer
    Pencil Code Foundation
    88 Lincoln Road Lincoln, MA 01773 United States
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.


The developer has not provided any information about the collection or usage of your data.


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