This project implements the Sudoku web app used on SudokuExchange.com.
Features include:
- Enter a puzzle into a blank grid (e.g: transcribe a printed puzzle)
- Check that the puzzle has a unique solution (in case you made a typo)
- Share a puzzle as a link like this
- Two types of pencilmarks (for Snyder notation and doubles/triples or simple candidate lists)
- Cell colouring
- An optional dark mode theme
- Keyboard shortcuts for desktop browsers (including Ctrl-Z/Y Undo/Redo)
- Touchscreen support for mobile or tablet browsers
- Help option on the menu to access user guide
- Multi-cell selections for entering pencil marks
- Flexible display: scales up to huge screens or down to small screens, adapts automatically to portrait vs landscape orientation, and supports full screen mode to remove distractions
- Configurable options so you can turn on the features you find helpful and turn off the features you find annoying
- Free to use and no ads
- Full source code available
This software is copyright (c) 2019 Grant McLean grant@mclean.net.nz and is released as free software under the terms of the GNU Affero General Public License (AGPL) version 3 or later. You may use, copy, modify and share the software under the terms of that license.