Stockfish
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Stockfish is the strongest chess engine on Earth.
Open source, built by volunteers since 2008, and rated hundreds of points above any human who has ever lived. Here it plays with a handicap against Claude, an AI language model coached by a ten-agent war room. You can practice against the same engine for free.
Claude hasn't said anything yet.
Ten agents plan every game
Before each game a desk of ten agents meets in this terminal: an opening theorist, a tactician, a risk manager, an engine psychologist and six more, chaired by a captain who turns the argument into a plan for Claude. After the game they hold a post-mortem and write what they learned to persistent memory.
Download the desk's knowledge as a skill
Everything the war room has learned, packaged for any LLM: a SKILL.md, the lessons, every exhibition game as PGN, the ten strategists' prompts, and a small MCP server that gives your own agent Stockfish's best move for any position through this site's analysis API. Regenerated live as games are played.
When people describe AI no human can compete with, they reach for Stockfish
"Stockfish-level" has become shorthand for superhuman. The engine on this page is that Stockfish, running at a handicap so a language model, and you, stand a chance.
AI will achieve Stockfish-level coding and generalized computer use
I have to say that if he did use Stockfish butt vibes, he deserved to win. At least once.
Computers are so much better than humans at chess, it’s absurd.
I predict that chess will be essentially fully solved (like checkers) within 10 years.
ELON MUSK: “AI can do anything digital, anything that does not require shaping of atoms by hand, probably by the end of next year. AI software will be stockfish-level good meaning that it is impossible for a human to compete in writing software with AI. AI will crush all humans.”
Elon Musk said that within 12-18 months no human will be able to compete with AI at writing software:
"AI is already incredibly good at software."
"It's getting to the point where AI won't just be good at software, it'll be what I call Stockfish level good."
"Stockfish is a…
Elon just put a clock on human coders.
He says AI is already incredibly good at software, and next year it will hit what he calls Stockfish level: so far ahead that a person cannot compete.
He thinks AI will crush every human at writing code, and will be extremely good at all…
Stockfish is the world's strongest chess engine (Elo ~3650). It dominates grandmasters like they're beginners.
"Stockfish-level coding" means AI that programs at that same superhuman tier: writing, debugging, optimizing, and architecting complex code with elite speed,…
The record so far
| Game | Matchup | Result | Plies | Claude said |
|---|---|---|---|---|
| No games yet. | ||||
Your turn against the fish
Practice against the same engine at any level, free, no wallet needed. Undo and hints are allowed, and it never gets tired.
- Pick a level. Level 0 blunders like a beginner. Level 20 is the real engine, and nobody beats it.
- Play. Click or drag to move. Take moves back, ask for a hint, flip the board.
- Learn. Every move shows the engine's evaluation in plain words, so you can see where a game turned.