SigAI
You
Chess
Frequently Asked Questions
How do I play chess against AI on SIG Chess?
Simply visit chess.sig.ai and start playing immediately. Drag pieces to move or click source then target square. Adjust AI difficulty from 0 (beginner) to 20 (master) using the Skill Level control. No account or download required.
Is SIG Chess free to play?
Yes, SIG Chess is completely free. You can play against AI, solve daily puzzles, and play multiplayer matches without any payment. Create an optional free account to track your rating and game history.
What chess engine does SIG Chess use?
SIG Chess uses Stockfish, one of the strongest open-source chess engines in the world. The engine runs directly in your browser using WebAssembly for fast, responsive gameplay.
Can I play chess multiplayer on SIG Chess?
Yes, SIG Chess supports real-time multiplayer matches. Create an account, click 'Play Online', and you'll be matched with players of similar skill level. Games are rated using the ELO system.
How does the daily puzzle feature work?
Each day features a new chess puzzle with a specific rating. Click 'Daily Puzzle' to play. Find the best move or sequence of moves to solve the puzzle. Your puzzle rating increases when you solve harder puzzles.