TGL Chess

Standard chess in your browser. No login required — play solo against an alpha-beta minimax AI (depth 1–4) or invite a friend to a live, server-validated match.

How to play

• Click-to-move or drag-and-drop — both work on mouse and touch.
• Legal moves light up as dots when you select a piece.
• Castling, en passant, and pawn promotion (with Q/R/B/N picker) are all supported.
• Press Z to undo (solo only), R to resign, D to offer / accept a draw.

Solo vs AI

The AI uses minimax with alpha-beta pruning, iterative deepening (depths 1–4), simple piece-square tables for evaluation, and a per-move time budget so depth 4 never freezes the UI. Move ordering favors captures (MVV-LVA) and promotions for tighter pruning.

Live multiplayer

Switch to Friend match to host a game. The server holds the authoritative position and validates every move — cheating with a tampered client is impossible. Send the invite code (or share link) to a friend; the joiner pastes it. Resignation, draw offers, and time forfeits all flow through the server.

Time controls

• Bullet 1+0 — one minute per side, no increment.
• Blitz 5+0 — five minutes per side.
• Rapid 10+0 — ten minutes per side.
• Untimed — no clock; play at your own pace.

Anti-cheat

Every solo game submits a UCI-encoded move log. The server replays it through the same rules engine to verify the final position and outcome. In multiplayer, the server is the only authority — the client is a thin renderer.