Knightfall:Chess with AI Coach

Knightfall is a beautiful, feature-rich chess app that combines world-class engine play with on-device AI coaching — all in a sleek dark theme built for modern Android.

♞ PLAY THE AI
Challenge Stockfish 18 — the strongest chess engine on the planet — at six difficulty levels from casual beginner (700 Elo) all the way up to Master (3000 Elo). Whether you're learning your first opening or sharpening your endgame technique, there's a level that challenges you just enough.

🧠 MEET YOUR COACH
Download the optional on-device Gemma 4 AI coach (2.5 GB, one-time download, runs completely offline after that). Coach Gemma watches every game in real time and offers natural-language commentary after each move — no cloud required, no subscription, no data leaving your device. Ask her anything: "Why did I lose that pawn?" or "What's my best plan here?"

🌐 PLAY ONLINE & ON THE WEB
— Cross-Platform Play: Open chartmann1590.github.io/knightfall in any desktop or mobile browser to play online games, sync your stats, and access your profile from anywhere.
— Quick Match: instantly pair with a random opponent and play for your Elo rating.
— Play a Friend: generate a 6-character invite code and share it anywhere. Your friend enters the code and the game begins — no account linking needed.
— All online games are rated. Your Elo updates live after each game.

🏆 LEADERBOARD & PROFILES
Opt in to a public profile and compete on the global leaderboard. See your stats, win/loss/draw record, and game history any time. The live leaderboard and profile stats are also accessible directly on the Knightfall website.

🔒 PRIVACY FIRST
Play as a guest (no account required) or sign in with email. Every data-sharing feature — Crashlytics, Analytics, Performance Monitoring, push notifications — is individually opt-out in Settings. No personal data is shared by default until you explicitly choose to.

✨ BEAUTIFUL & POLISHED
— Material 3 dark chess theme
— Smooth animated piece movement
— Tap-to-move or drag-and-drop
— Legal move dots, last-move highlight, check glow
— Three board color themes
— Move sounds and haptic feedback
— Works offline (AI mode requires no internet)

Knightfall is free. No ads. No pay-to-win. Just chess.