puzzle:
Help
Enter a puzzle string in the input box or use the example. Next to the puzzle, a (possibly long) list of every option to use one of 19 possible solving techniques is provided. Click any for more info: 2 hints and a spoiler for each.
Once you have found an answer, click that cell and the correct number should appear if it the solution to any of the strategies in the list. Then a new list of hints will appear for the updated puzzle. Repeat until the puzzle is solved.