I built a chess notation trainer with Claude — and never wrote a single line of code

I picked up Logical Chess: Move by Move a few months ago. Great book. Except every few pages I'd hit a move like Nxb5+ or O-O-O and completely lose the thread. I'd stop, count files, second-guess myself, then forget what Chernev was actually explaining. I went looking for a free tool that just drilled notation. Nothing paywalled, nothing that needed an account. Couldn't find one I liked. So I built it: ChessNotate - a free, offline-capable chess notation trainer with spaced repetition. And I bui