Over 10M cubeful games per pairing, with every network playing at 0-ply under the same engine code, Colossus, HedgeHog's strongest network, beats every reference engine in the round-robin by at least 0.047 points per game. Each pairing and its confidence interval is on the benchmarks page.

Cross-platform accessibility

Access your matches anywhere. HedgeHog is the first truly cross-platform experience: web, mobile, and desktop all speak the same format and share the same cloud.

Cloud-based match storage & analysis

Import, analyze, and archive every match. Powerful search and filter tools let you instantly find any position from any device. Your library follows you, not the other way around.

Track your progress

Error-rate trends, blunder histograms, and per-phase breakdowns for every match you play or upload. See how you stack up against the world's best, and watch your numbers climb.

Study tools to improve your game

Build position trees, branch variations, and let the engine find the lucky and unlucky rolls in any spot. Annotate your reference positions and return to them on every device.

Learn from every analysis

Every checker play and cube decision gets its equity, the size of the error and the engine's ranked alternatives. The help explains what each number means and how the engine decides when to double, take or pass.

Play against the engine

Take on HedgeHog in a money game or a match of any length, with the cube, automatic doubling logic, and instant hints on tap. Play right in your browser, with no install and no account required.

Transcribe live & over-the-board matches

Follow a live game, a stream, or a video and record it move by move. HedgeHog rebuilds the whole match as you go and analyzes every checker play and cube decision in real time, so an over-the-board game becomes a fully analyzed match the moment it ends. Pop it out into a floating window to keep it on top while your video plays.

Broadcast your matches live

Share any transcription with a public watch link and drop ready-made OBS overlays straight into your stream: board, analysis, and a running match summary. Your viewers follow along live with engine analysis on every move, and your match is listed on the Live broadcasts page so people can find it without a link.

Free to start, upgrade to train with the best

Everyone plays and analyzes with our strong free model. Upgrade to Standard or Pro for our frontier network, the same engine we benchmark against the world's top players.

Works with HedgeHog

These applications connect to your HedgeHog account and send your matches and positions here for analysis. You approve each one once, and can disconnect it at any time from Settings.

• AnkiGammonankigammon.com

  Turns your matches and positions into Anki flashcards, with HedgeHog's analysis on every card, so you can drill your mistakes until they stick.

Open to developers & the community

Build on HedgeHog. Embed our WASM engine, fine-tune our public models, or work with the OGID position format. They are the same open building blocks the engine itself uses.