How people play
Room-code online, Local vs pass-and-play, or vs Computer from Beginner through Expert. Expert thinks in a Web Worker so the board never freezes. King of the Hill is the one extra win condition.
Common challenges
- Hanging pieces Moving fast and leaving a queen en prise because the highlight looked like a capture.
- Castle greed O-O into an open file you opened yourself.
- Clock panic Blundering on 1+0 instead of making a legal waiting move.
What strong play proves
A clean mate (or a held draw against a better engine) shows you can calculate a short line without forgetting whose king is hotter.
What it improves
- Forward planning You rehearse “if I do this, they do that” before you commit.
- Pattern recognition Wins come from spotting shapes, threats, and repeats early.
- Opponent reading You track habits, bluffs, and tells across rounds.
- Composure Mistakes happen — recovering cleanly is the real skill.
Best for
Anyone who wants real chess rules in the browser — not a house-rules sketch.