A place for every
part of your chess.

Study

Silicon Board

A workspace for every idea on the board.

Open your games, explore variations and keep your analysis together with comments, arrows and diagrams. Set up any position with the FEN editor.

• Build and organize your PGN library
• Analyze with Stockfish 19 and explore the opening book with Premium
• Create diagrams, analysis sheets and game videos

Android: PGN tools and local library are free. Stockfish 19 requires Premium or an active trial. Android subscriptions and web purchases are separate.

Study

Silicio Chess Reader

Your chess books. Your board. One place to study.

Read a chess PDF alongside the board. Set up a position, follow variations and keep your notes beside the page, without switching between apps.

• Organize your books and studies
• Analyze offline with Stockfish 19 in the Android app
• Review saved variations and back up your library

Demo: one PDF at a time, kept in this browser. Stockfish and PGN export are included in the full Android app.

Play & explore

Journey of Champions

18 champions. 570 puzzles. Your journey through chess.

Discover the world champions through their stories, portraits and chess. Solve positions at each stage, answer questions and collect gems as you progress.

• 360 basic checkmates and 210 intermediate and advanced puzzles
• Hints, step-by-step solutions and a completion certificate
• Up to six local players, with exportable progress backups

Steinitz and Lasker are free. The complete web edition is a separate purchase from Android. Progress stays in this browser.

Training

Chess Tactics

Turn the positions you miss into your next practice session.

Practice forks, pins, sacrifices and mating combinations. Return to the puzzles you missed and work through each solution one move at a time.

• 12,589 puzzles across 48 themes and three levels
• Custom tests and a review of your mistakes
• Offline training and up to five local profiles

Demo: 27 puzzles covering forks, pins and skewers at three levels. No account required; progress is stored locally.

Training

Chess Openings

Find the best continuation from the opening.

Recognize threats, calculate variations and punish mistakes in real opening positions. Strengthen your understanding through tactical practice.

• 10,453 puzzles across 14 opening themes
• Sicilian, French, Italian and other openings
• Custom tests, mistake review and five local profiles

Demo: 27 Sicilian, French and Italian positions at three levels. Your progress stays in this browser.

Training

Chess Endgames

Work on your endgames, piece by piece.

Practice pawn, rook, bishop, knight, queen and mixed endgames. Follow the solution, revisit difficult positions and improve your calculation.

• 10,414 puzzles across seven themes and three levels
• Tests built from new puzzles or your mistakes
• Offline practice and five local profiles

Demo: 27 pawn, rook and bishop endgames at three levels. No registration required.

Training

Chess Checkmates

Recognize the pattern. Calculate the checkmate.

Practice mating patterns from mate in one to longer combinations. Choose your challenge and study the complete sequence, move by move.

• 12,017 puzzles in five themes
• Mate in one, two, three, four, five and more moves
• Custom tests, mistake review and local profiles

Demo: 24 puzzles with mates in one, two and three. The highest difficulty starts at mate in two.

Training

Chess Defense

Find the defensive resource in time.

Respond to concrete threats: protect your king, save a piece or stop a promotion. Discover when defense calls for counterplay.

• 12,000 puzzles and nine defensive themes
• 4,000 puzzles at each of three levels
• Review mistakes and create your own tests

Demo: 27 puzzles on escaping check, interposing a piece and eliminating the attacker.

Training

Chess Calculation

Three candidate moves. One calculated decision.

Before moving, compare your candidates. Evaluate each as winning, equal or worse, find the move that gives a decisive advantage and play out the continuation.

• 10,000 exercises at three levels
• Candidate selection, refutation and final-position evaluation
• Prepared variations, mistake review and five local profiles

Demo: 27 exercises across three calculation skills. No account required; progress stays in this browser.

Play & explore

Silicon Clock

Your time control. Ready for the next game.

Turn your phone, tablet or computer into a chess clock for your physical board. Set the time control and tap your clock after each move.

• Fischer increment, Bronstein delay and up to three stages
• Save up to 20 favorite time controls
• Pause, adjust the clocks and undo an accidental tap

The complete web clock is free, with no account or ads. Games and settings are saved in this browser.

Play & explore

Silicon Scoresheet

Your board sets the pace. Your scoresheet keeps the game.

Record your training games with a chess keyboard, times and comments. Return to each game from your personal library and take it into your next study session.

• Notation guidance while you record your moves
• Import and export PGN, and download a printable PDF
• A local library with JSON backup and restore

The complete browser version is free. Your games stay on this device. Android is also free, with no ads or account. For training games.

Play & explore

Silicon Challenges

Observe. Remember. Connect. Solve.

Give your mind a different kind of puzzle. Use a chessboard to practice memory, attention and logic, whether you are new to chess or already play.

• Seven types of challenge, with interactive guides and hints
• 58 free challenges and a rotating daily challenge
• Local stars, favorites and progress

Available on Android with 58 free challenges and an optional one-time purchase to unlock all 444. The browser demo includes the free area; no purchases are available in this demo.

Training

Chess: Memory & Vision

Learn to see the board in your mind.

Practice blindfold play, memorize opening lines and reconstruct positions. Adjust the visual challenge with visible pieces, circles or hidden pieces.

• Blindfold games against Stockfish 19 at four levels
• 60 essential opening lines and a catalog of 3,815 lines
• Position memory and reconstruction

Demo in English: three opening lines, position reconstruction and ten moves per side against Stockfish 19 at level 1. Progress stays in this browser, separately from Android.