Crate chess_compression

A library for compressing chess moves and positions. The code is straight ports of Java and Scala originals made by the Lichess project, with some tweaks to the API.

Note that when decompressing, you need to know how many plies you want to decompress. This is because a given move sequence is not guaranteed to fill the last byte exactly. In this case, any trailing bits in the input would cause havoc if we didn’t know how many elements to decompress.

Enums

Error

Errors that can occur when decompressing or compressing moves.

Functions

compress

Compress a sequence of moves from the starting position.

compress_from_position

Compress a sequence of moves from a given position.

compress_position

Compress a position.

decompress

Decompress a given number of moves from the starting position.

decompress_from_position

Decompress a given number of moves from a given position.

decompress_position

Decompress a position.

read_move

Low-level function that reads a single move from a BitReader.

write_move

Low-level function writing a single compressed move to a BitWriter.