Tabia – Open-Source Chess Opening Trainer

A free, browser-based chess opening drill tool that runs entirely locally with no account needed. Users practice chess opening lines and never forget key positions mid-game. Built with chess.js and Stockfish WASM, it's a privacy-first alternative to paywalled competitors like ChessReps.

Chess content and tooling has seen sustained growth since the 2020-2021 boom driven by *The Queen's Gambit* and the Carlsen-Niemann controversy keeping the game in cultural circulation. Chessable is the dominant incumbent here — a well-funded platform with spaced repetition and a large content library — and any free alternative is implicitly measured against it. The revenue band is listed as unknown for good reason: open-source, no-account, local-first tools don't have an obvious monetization path, which means this lives or dies as a portfolio piece or community project rather than a business. The most likely failure mode isn't technical — it's that serious players already use Chessable or Lichess's built-in opening study tools, and casual players don't drill openings at all, leaving a very thin middle slice of users who want a local-first alternative badly enough to seek it out.