castle Chess

Play chess vs a Stockfish-powered AI or a friend - full rules, timers, move history and PGN export.

person Youtimer 0:00 White's move timer 0:00smart_toy Computer
8
7
6
5
4
3
2
a1
b
c
d
e
f
g
h
castle

Ready to play?

Choose a mode and difficulty, then start the match

Move History

No moves yet

Setup
Mode
AI Difficulty
Play as
Time Control
Board theme
Pieces
Stats
0Wins
0Losses
0Draws
0%Win rate
Coming soon
public Multiplayervisibility Spectateextension Puzzlesquery_stats Analysis

Play chess against a Stockfish-powered AI (one of the strongest chess engines in the world) or challenge a friend on the same screen - with full rule enforcement, timers, and the ability to export your game in standard PGN/FEN notation for review or sharing.

Frequently asked questions

Stockfish is one of the strongest chess engines available, capable of playing at superhuman strength - most implementations let you adjust the difficulty/depth so beginners and experts alike can find a suitably challenging game.

PGN records the full move history of a game (useful for reviewing or sharing a complete match), while FEN captures a single board position as text (useful for setting up or sharing a specific position). Both are standard chess notations recognized by virtually all chess software.

Yes - alongside playing against the AI, local two-player mode lets two people share one screen and take turns.