Ask C4: Free Chess Chatbot With Its Own Board

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Paste a game to see it here

Ask C4Our own engine and lessons · no AI chatbot

Hi! I'm C4. I can show you how every piece moves, teach check, checkmate and tactics like forks and pins (with puzzles to practise!), analyse a game or position, and answer opening questions from our opening book. Paste a PGN, a FEN, or a list of moves (like “e4 e5 Nf3 Nc6”), or ask something like “how does the knight move?”, “what is checkmate?”, “give me a mate in 1” or “what should Black play against 1.d4?”. No AI chatbot here: Ask C4 is C4Chess's own system. Its answers come from lessons written by our team, our own chess engine, opening book, puzzle bank and game library. It does not use ChatGPT, Claude, Gemini, Grok, Copilot, Meta AI, Llama, DeepSeek, Mistral, Perplexity or any other AI chatbot or language model, and nothing you type is sent to one.