What this is
PuzzleMosaic is a small, independent site offering seven classic board and puzzle games in the browser, along with written guides for each of them. There are no accounts, no downloads and no paid tier.
The games
Every game is written from scratch in plain JavaScript and runs entirely in your browser. Nothing is sent to a server, which is why they work offline and why your progress stays on your device.
That includes the opponents. The chess engine uses alpha-beta search with piece-square tables and a quiescence search. Checkers uses minimax with a positional evaluation. Gomoku scores threat patterns and searches a shortlist. Go plays by shape heuristics — captures, atari, liberties and eye protection. Sudoku puzzles are generated and verified for a unique solution in the browser, and every mahjong deal is constructed so that it can always be cleared.
The guides
Seventy articles plus seven how-to-play pages, written specifically for this site. They are aimed at the gap between knowing the rules and playing reasonably — the part most instructions skip.
Where a diagram helps, there is one, drawn as inline vector graphics from the actual positions rather than pasted as images. Nothing is sponsored, and no advertiser has influenced any recommendation.
Accessibility
- Every game is playable from the keyboard as well as by pointer or touch.
- Board squares and tiles carry descriptive labels for screen readers.
- Status messages are announced politely as the game state changes.
- A light theme is available for anyone who finds the dark one hard to read.
- Motion is reduced automatically if your system requests it.
Privacy
No accounts, no personal data, no tracking before consent. Analytics and advertising are both opt-in and both can be withdrawn at any time from the footer of any page.
Languages
The interface, the games and the navigation are available in ten languages. The long-form guides are currently written in English, with translations being added over time.