A chess engine designed to fit into 4kB. Currently developed for the sole purpose of competing in the TCEC 4K.
Pytteliten is currently just one .cpp file that is read by the minifier and remade into an identically behaving but vastly smaller source -
see here for a more detailed explanation of how the minifier works.
This minified source is appended to a launch script by the build script. When the launch script is run, it will compile an execute the minified source.
Together it's the launch script as well as the minified source that is counted towards the 4kB limit.
Pytteliten-mini does not support various parts of the UCI protocol that would otherwise be standard in a UCI engine and is only made to be compatible with the tournament standards of TCEC 4K. The minifier is not a universal C++ minifier and is only made to support Pytteliten's source.
Development is mainly centered in the #pytteliten channel at the Engine Programming Discord server.
Contributions must be formatted with the .clang-format in the source and be compileable after minification. GitHub jobs handle these checks.