Coding Adventure: Making a Stronger Chess Engine

Trying to improve an old chess bot by experimenting with various interesting techniques. You can play (or watch) the bot on lichess: https://lichess.org/@/CodingAdventureBot This is a sequel to: https://youtu.be/U4ogK0MIzqk If you'd like to support my work (and get early access to new videos and projects) you can become a patron of the channel over here: https://www.patreon.com/SebastianLague Source code: the new version is currently in early access to patrons, but will be available to everyone in about two weeks. A really fun video about various algorithms for playing chess by @tom7: https://www.youtube.com/watch?v=DpXy041BIlA Music and other credits: https://github.com/SebLague/Misc-Project-Info/blob/main/Chess-2/Credits.txt Chapters: 00:00 Intro 00:38 Battle of the Bots 03:18 Maybe Don’t Throw Away the Best Move? 07:13 Transposition Troubles 10:55 Search Extensions 14:01 Refactoring and Recapping 15:51 Tweaking Kings and Pawns 19:35 Bitboards! 23:54 Passed Pawns (and more) 28:32 Magic Bitboards (minus the magic) 34:40 The Magical Part of Magic Bitboards 39:00 Testing and Optimizing Move Generation 41:50 Killers, Reductions, and Repetitions 45:56 Creating a Lichess Bot 49:30 Let’s Play! 54:54 Existential Crisis 55:02 The Bot’s First Game Online 56:12 Can Our Bot Beat Stockfish? (No) 56:59 Rating Speculation 59:28 Outro