Show HN: UnicornFork a Chess AI That Is Fact Checked by Stockfish

Stockfish finds the best move. UnicornFork explains it. Ask about any position in plain language and get answers you can see on the board.

Morphy's Opera Game, Paris 1858. Hover or click the moves in the chat to see them on the board, or step through the game.

A prompt decides how the coach works for you: how deep it goes, how much jargon it uses, how long its answers are. Here's the question from the game above with each built-in prompt.

What's the best move here? Morphy's Opera Game, after 15...Nxd7

16.Qb8+!! wins on the spot: a queen sacrifice that mates in two, 16.Qb8+ Nxb8 17.Rd8#.

Other moves give Black time. 16.Qb5, pinning the knight, even throws the win away: after 16...Be7 17.Bxe7 Kxe7 the bishop on g5 is gone, and it's a draw.

White has something crushing here. Can you find it yourself?

Give it a try: which move would you play?

White can win right away by giving up the queen!

This trick is called a deflection: you lure a defender away from the job it was doing. When one enemy piece guards something important all on its own, look for a way to pull it away.

None of them quite right for you? Copy one and change it, write your own from scratch, or pick one other players share.