Show HN: Notation – an iOS chess coach (Stockfish and optional BYOK Claude)

Category: other

Tags: chess, coaching, ios-app, stockfish, ai-commentary

Score: 6.7/10 (Innovation: 7, Technical: 6, Documentation: 5, Utility: 7)

Notation is an iOS chess coaching app that combines Stockfish 18 engine analysis with optional AI commentary via Anthropic API, offering a personalized coach 'Nadia' and a self-play mirror 'Shadow'. Its innovative blend of human-like coaching, physical board integration, and generative ambient music makes it a unique tool for players of all levels.

Target audience: backend devs, data engineers

Repository: https://notationchesscoach.app

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