Open source notices
This site is built on the software below. All of it may be redistributed, and carrying these notices is the condition for doing so.
Sudoku analysis
- Kyouyama SudokuMITCopyright (c) 2019-2026 Kyouyama Kazusa (Kazusa)
- .NET runtime and base class librariesMITCopyright (c) .NET Foundation and Contributors
- International Components for UnicodeUnicode-3.0Shipped as part of the .NET runtime
The pages
- @fontsource-variable/bricolage-grotesqueOFL-1.15.3.0
- @fontsource-variable/geistOFL-1.15.3.0
- lucide-reactISC1.28.0
- reactMIT19.2.8
- react-domMIT19.2.8
- schedulerMIT0.27.0
- zodMIT4.4.3
What is deliberately not here
Upstream, the sudoku engine carries puzzle-generating code under GPL-3.0. This site has its own generator and does not include that code. Three things are checked on every build: the vendored source, what the projects are allowed to compile, and the published assemblies.
Everything else — the code, the puzzles, the writing and the design — belongs to this site and is not open source.