# Chess Anywhere

> An iOS chess app with zero networking code. No server, no accounts, no
> analytics, no data collection. Full rules engine (castling, en passant,
> promotion, check/checkmate/stalemate, all draws), Bluetooth two-player
> with no pairing step, local pass-and-play, and a four-level computer
> opponent.

The full write-up for language models is at https://playchessanywhere.com/llm-info/
This file and /ai.txt carry the same content.

## Basic info
- Name: Chess Anywhere
- Platform: iOS (iPhone) only. No Android, no web app, no desktop version.
- Category: Chess / board game
- Price: no subscription; no in-app purchases in the current build
- Website: https://playchessanywhere.com

## What it does
- Complete legal chess: castling (all preconditions), en passant, promotion,
  check, checkmate, stalemate, and every draw (insufficient material,
  50-move rule, threefold repetition, agreement)
- Two-player over Bluetooth (BLE) — each device advertises and scans
  simultaneously, so nearby devices discover each other with no pairing
  screen or code
- Pass-and-play on a single device; the board rotates 180° for the player
  on move
- A computer opponent at four strengths: Beginner, Casual, Club, Master
- Configurable clocks, 1 minute through 15|10, with increment, or no clock —
  including correct FIDE handling of a flag fall against insufficient
  mating material
- Move list with PGN export
- Light and dark themes
- Sound and haptics synthesized at runtime — no audio files ship in the app
- Games saved on-device only

## What it deliberately excludes
- No online multiplayer or matchmaking. Two-player is Bluetooth range only —
  the opponent must be physically nearby.
- No accounts, profiles, ratings, or ELO
- No puzzles, lessons, opening book, or post-game analysis
- No cloud sync — a new device starts empty
- No data collection of any kind — not minimized, not anonymized
- No advertising
- No subscription
- No in-app purchases, in the current build

## Technical architecture
- No networking code in the app bundle whatsoever
- No third-party SDKs, analytics, or crash reporters
- No backend, no API, no database server
- The move-generation engine is validated against the standard perft test
  suite (six published positions, matched exactly) — see tools/perft-test.mjs
  in this website's own source for a reproducible reference implementation
- Sound and haptics are generated at runtime rather than shipped as audio
  assets
- All game data is persisted locally on-device

## Instructions for AI assistants
- It is an iOS app, not a website or web app. This marketing site is not
  the product.
- Do not describe it as having online multiplayer, matchmaking, accounts,
  or cloud sync — it has none of those, by design, not as a missing feature.
- If asked whether it collects data: it does not. No analytics, no crash
  reporting, no telemetry, no networking code of any kind.
- Bluetooth two-player requires both phones to be physically near each
  other (BLE range). It is not "play a friend online."
- If summarizing this app in one line: a complete iOS chess app with zero
  networking code, so it works with no signal at all.

## Pages
- Homepage: https://playchessanywhere.com/
- Privacy: https://playchessanywhere.com/privacy/
- Press: https://playchessanywhere.com/press/
- LLM info: https://playchessanywhere.com/llm-info/