nostr:npub1z8gtve683pa6nfknfv37kvfgwd6tgkc6rvtpatz5evvrc5lqpmmszk36vwnostr:npub1z8gtve683pa6nfknfv37kvfgwd6tgkc6rvtpatz5evvrc5lqpmmszk36vw

Free chess book.

https://archive.org/details/fundamentalchessopenings