FlexiChess icon
FlexiChess icon

FlexiChess

Chess suite in the browser with a searchable 10.4-million-game database for positions, structures, and themes; Stockfish analysis; FSRS spaced-repetition training; detailed repertoire builder; opponent scouting; PGN import; cloud library sync; and AI coach verification.

FlexiChess screenshot 1

Cost / License

  • Freemium (Subscription)
  • Proprietary

Application type

Platforms

  • Online
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FlexiChess information

  • Developed by

    FlexiChess

  • Licensing

    Proprietary and Freemium product.

  • Pricing

    Subscription that costs $14 per month + free version with limited functionality.

  • Alternatives

    13 alternatives listed

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  • Supported Languages

    • English

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Games, Gaming Software

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FlexiChess was added to AlternativeTo by blueshoess on and this page was last updated .

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What is FlexiChess?

FlexiChess is a chess preparation suite that runs entirely in the browser — no download, no licence key. It combines a 10.4-million-game tournament database (club level to world championship) indexed for both exact-position search and structural search ("isolated queen's pawn middlegames, 2700+, decisive"), a Stockfish engine running client-side, a repertoire builder with FSRS spaced-repetition training, opponent scouting, and an AI coach whose output is verified against the engine before display — every move it names is checked for legality.

The free tier includes the board, engine, opening explorer and eval graph with no account at all; a free account adds PGN import, FSRS training, opponent scouting, Leakfinder and the AI coach (15 questions a week). One paid tier ($14/mo or $109/yr) raises the ceilings: up to 100 coach questions a week, up to 1,000 opponent scouts a month, full-depth structural search, and a synced cloud library.