IRONWOOD CHESS

Your next move starts here

More than a board.
A better way
to study chess.

Play a game. Understand the turning points. Practice what comes next. Your engines, games, and ideas come together in one free chess workspace.

Open Ironwood Take a look inside

Runs in your browser. No account needed for local play and analysis.

Free & open sourceNo adsNo analysis cap
IRONWOOD CHESS PLAY · STUDY · EXPLORE
Ironwood’s marble 3D chess board with sculpted pieces
Your board. Your perspective.Explore the gallery
Built for the curious player.From the first move to the final lesson.
Stockfish 19 built inPlay on Lichess & FICSYour games, saved locallyOptional desktop Companion

Every game has something to teach you

See the position.
Find your next step.

Go beyond the evaluation. Compare decisions, explore ideas, and turn a finished game into a useful practice session.

Chess board beside accuracy, centipawn loss, and move-quality comparison charts
01 / UNDERSTAND

Find where the game changed.

Compare accuracy and centipawn loss, inspect evaluation swings, and replay the engine’s preferred line. Keep separate analysis runs from different engines.

Explore analysis
Training progress with a rating history and suggested areas to practice
02 / PRACTICE

Give your practice direction.

Train against AI, follow your progress with both colors, and work on suggested puzzle themes. Revisit missed Lichess puzzles at your own pace.

Find your training routine
Opening Explorer with game statistics and an opening continuation tree
03 / EXPLORE

Follow an idea further.

Explore openings and endgames, inspect pawn structure and tactical relationships, and keep your own notes and drawings beside the board.

Discover the study tools

One workspace, real opponents

Play the game.
Keep the lesson.

Play on Lichess or FICS, then review on the same board. Follow players, explore their games, and bring your own collection into Ironwood.

Bring your games along

Lichess

Matchmaking, challenges, correspondence, and player profiles.

FICS

Find opponents, watch live games, and join the conversation.

Optional. Powerful. Yours.

A little more room
for your chess.

Start with Stockfish in your browser. Add Companion for Windows when you want desktop engines and a larger game archive.

  • Choose your engine. Bring compatible UCI engines to play and analysis.
  • Organize your games. Browse named archives and collections from Saved Games.
  • Import in the background. Let Companion process your game files while you study.
Companion for Windows Setup guide

Windows x64 · Optional download · Browser and Companion libraries stay separate.

Make yourself at home

Your everyday chess workspace.

Free, open source, and ready when you are. Install Ironwood for quick access, or keep it a tab away.

Store the 94.5 MiB engine on this device for offline play and analysis. Online features need a connection.

Explore the source
Open Ironwood A hand getting started