The Silicon Chess collection
A book to study. A position to solve. A game to discover. Find the app that fits the way you play chess.
One shared passion13 ways to explore it
AndroidFind the available apps on Google Play.
Windows & browserFree tools, interactive demos and optional complete editions.
iOSUse compatible browser tools today. Native apps are coming later.
Find your next session
Study a game, work through a book or take on a new challenge.
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.
Android: PGN tools and local library are free. Stockfish 19 requires Premium or an active trial. Android subscriptions and web purchases are separate.
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.
Demo: one PDF at a time, kept in this browser. Stockfish and PGN export are included in the full Android app.
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.
Steinitz and Lasker are free. The complete web edition is a separate purchase from Android. Progress stays in this browser.
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.
Demo: 27 puzzles covering forks, pins and skewers at three levels. No account required; progress is stored locally.
Silicon Challenges · 58 free challenges
Watch the pieces before they dissolve and remember their squares. In Ascent, each correct answer starts the next round automatically. Choose Relax to take your time or Quick for one short round.
Free area included. Optional one-time purchase for the full catalog. Browser and Android progress stay separate.
The Creator
Garri Pacheco brings his experience as a FIDE Master, chess instructor and programmer to tools for studying, training and playing.
Meet Garri PachecoStudy. Train. Play.
Try a demo or open a free tool in your browser. Your next chess session starts here.
