FlexiChess — prep smarter, play sharper

Browser-native chess preparation for serious players: a 10.4M+ game database with exact-position search, Stockfish analysis, spaced-repetition opening training, and a full database workbench — no desktop install, and your data stays local until you choose to sync.

• 10.4M+ game database

  Full-database position search, measured ~85 ms warm median on production infrastructure (Jul 2026).

• Stockfish analysis

  Multi-line engine analysis with eval graph, annotations, and a professional database workbench — all in the browser.

• Search by idea, with precise filters

  Stack structures, endgames, openings, players, and ratings — “IQP + rook ending, White wins, 2600+” — and get the games that actually match.

• Scout your opponent (Pro)

  Automated opponent prep — their opening tendencies, how they score line by line, and the gaps to target before round one.