chess flex

Real chess.
Your circle.

Peer-to-peer chess for iPhone. Play the friends you choose — or human-like bots — with real FIDE ELO, timed or untimed. No accounts, no servers, no chat — just the board. And now: learn by watching two bots play while a voice coach explains every move.

Their move async game from SilentBishop
Why ChessFlex
Chess, stripped back to the game.
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Watch and learn

Two bots play while a voice coach explains every move, with live win chances and "what if" to see the better line after a mistake. Six voices, from a calm Coach to a cricket commentator and a Bard who tells the game as a war between two kingdoms; the Coach and the Bard also speak Hindi and Tamil.

♟

Your circle

No global matchmaking, no strangers. You connect by trading a QR code — in person or over iMessage — so the people across the board are people you chose.

♞

Humans or human-like bots

Six built-in bots from 400 to 2500. Pawn through Queen play like real people at their level — human mistakes, not random ones. King, at 2500, is a true engine for serious sparring. All free, and every game rates you from the very first move.

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No accounts. No servers.

No email, no sign-up, no tracking. Your identity is your device; your games live on your device and travel only between you and your opponent.

The vocabulary
The board is
the conversation.

No chat box. Ever.

Players speak only in standard chess annotation symbols — !! for a brilliant move, ? for a mistake. Nothing personal can be exchanged, so there is nothing to moderate. It's cross-language by default, and it quietly teaches chess etiquette to beginners. The annotation rides along with the move: SilentBishop played Bxe5 !?

How it works
From a QR to a game in four steps.
01

Trade a QR

Scan each other's code — in person or over iMessage. No friend requests, no searching by name.

02

Open the board

Your opponent taps the invite and the game opens. No account on either end, ever.

03

Make your move

Play async whenever you like, or set a live clock. An annotation can ride along with the move.

04

Watch your ELO move

Real FIDE rating updates after every game. It's your history, not your ceiling — anyone can challenge anyone.

Learn as you play.

One-time purchase · try it free for 14 days

STUDY

"It showed me why the move was a blunder — not just that it was."

Playing, ratings, and opening names stay free, always.
Free vs Study
Feature
ChessFlex Free
Study One-time · 14 days free
Play
Peer-to-peer games via QR
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Six bots, 400–2500 — King plays free
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Real FIDE ELO
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Your ELO history graph
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Opening name recognition
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Annotation symbols
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Learn
Learn an opening — 24 classic openings, explained
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Watch bots play, with voice commentary
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Six voices — Coach and Bard also in Hindi & Tamil
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Watched games saved with commentary
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Move-by-move game analysis
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Win-chance insight
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Guided openings & named lines
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Study Coach — best move on demand ✨
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Scan positions from screenshots
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Practice any position — FEN or board editor
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Privacy
No account required
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All data stored on-device
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Support
We're here.

Contact Us

Questions, feedback, or something unexpected? Reach out directly and we'll get back to you.

Contact →

Privacy

ChessFlex has no accounts, no analytics, and no ads. Your games live on your device and travel only to your opponent.

Privacy Policy →

About ChessFlex

Built by Labham LLC — a sibling to LexFlex. Peer-to-peer by design, with no servers in gameplay.

Meet LexFlex →