The most sophisticated chess opening platform ever built — an interactive move tree powered by 30 million real games.
FelixChess is unlike anything that exists today. Where other platforms show flat tables and static lines, FelixChess grows a living, branching move tree from real games — so you don't just learn an opening, you understand it. Built from decades of play across every level, every time control, every variant.
We are in the final stages of construction. The repository is being loaded. The move trees are taking shape. FelixChess will be available very soon.
Select any opening — by ECO code, name, or move sequence — and instantly explore a fully interactive variation tree built from real games. Filter by time control, Elo range, or year. See exactly which variations grandmasters prefer, which sidelines are trending, and how statistical outcomes shift deeper in the tree. The Move Tree is not a diagram — it is a living atlas of every decision ever played.
Enter a SPID — the Starting Position ID from 0 to 959 — and FelixChess generates a complete move tree of everything that has ever been played from that exact position. No memorised theory, only pure pattern recognition drawn from real games. Whether you're preparing for a Fischer Random tournament or simply expanding your understanding, Chess960 study has never had a tool like this.
Select any FIDE-registered player and view a personalised move tree built exclusively from their games. Identify their preferred variations, discover their habitual transpositions, and pinpoint the sidelines they have never faced. The preparation lens overlays a specific player's choices directly onto the full tree — so you see not just what is popular, but what they play.
FelixChess runs on Aegis XP, the most modern composable experience platform available — built on OSGi, Apache Sling, and Apache Jackrabbit Oak. Instead of a relational database, FelixChess uses a content repository designed for billions of nodes, allowing the game collection to grow to 30 million games and beyond without architectural limits. AI powers both the move tree analysis pipeline and the natural-language game search — ask for games in plain English, and FelixChess finds them.
Most chess databases are relational at heart — rows and joins that groan under the weight of millions of games. FelixChess replaces that paradigm with a hierarchical content repository, where every game, every position, and every opening variation is a node in an infinitely navigable tree.
The same architecture trusted by the world's largest content platforms — reimagined for chess at a scale no other site has attempted.
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We'll send you one email the moment FelixChess goes live — right in time to prepare for the 46th Chess Olympiad. No spam, no newsletters. Just the launch.