https://87flowers.com 87flowers' website documenting her life and her projects en https://87flowers.com/chess-leaper-indexing/ A small observation resulting in a trick that uses gf2p8affineqb in passing. chess Fri, 17 Jul 2026 12:00:00 GMT https://87flowers.com/chess-moveflags/ Earlier this year, I invented a move flags scheme that has been adopted by mutliple engines. This post describes the rationale behind the design of this scheme. chess Sat, 13 Dec 2025 12:00:00 GMT https://87flowers.com/permute-mailbox-to-bitboards/ We show that the mailbox and bitboard representations of a chess board are interchangeable. chess Mon, 08 Sep 2025 12:00:00 GMT https://87flowers.com/inverse-pshufb/ CPUs only have an in-vector forward permute instruction. How do you performantly do an backwards/inverse in-vector permute on a CPU? Let's find out. simd Sat, 28 Jun 2025 12:00:00 GMT https://87flowers.com/gf2p8affineqb-piece-directions/ A small trick that uses gf2p8affineqb in passing. chess Mon, 16 Jun 2025 12:00:00 GMT https://87flowers.com/byteboard-attack-tables-3/ We continue optimizing vectorized mailboxes in a chess engine. We show how to incrementally update the attack tables in a vectorized manner. chess Sun, 15 Jun 2025 12:00:00 GMT https://87flowers.com/byteboard-attack-tables-2/ We show how to do serialize moves from an attack table. chess Tue, 10 Jun 2025 12:00:00 GMT https://87flowers.com/byteboard-attack-tables-1/ We consider a new way of thinking about mailboxes in a chess engine. Along the way, we invent a new way of calculating incremental attack tables and write the world's fastest attack table-based move generator. chess Mon, 21 Apr 2025 12:00:00 GMT https://87flowers.com/en-passant/ Notes on legality checking for en passant in a chess engine. chess Sun, 20 Apr 2025 12:00:00 GMT https://87flowers.com/computer-shogi/ List of links to resources that would be helpful for a computer shogi engine developer. shogi Sat, 25 Jan 2025 12:00:00 GMT https://87flowers.com/socket-cmsgs/ Common example code on the internet for constructing cmsgs are subtly wrong! In this post I describe my current understanding of socket control messages. programming linux c zig Sun, 13 Oct 2024 12:00:00 GMT https://87flowers.com/ecl-recipe/ western blots not working? commercial ecl too expensive? labmates don't store the ecl correctly? this might be your solution! bio wetlab Wed, 25 Sep 2024 12:00:00 GMT https://87flowers.com/crtp-in-rust/ Can we use the CRTP idiom in Rust? We demonstrate how to achieve what would normally require CRTP in C++ with idiomatic Rust. We show how Rust traits allow for static polymorphism, mix-ins, and the Barton-Nackman trick. programming cpp rust Tue, 24 Sep 2024 12:00:00 GMT