thethirdone / fen4

A parser and writer for the fen4 file format used by Chess.com for 4 player chess games

fen4

A Rust library to parse and write fen4 file formats.

This provides a mapping from a simple representation of a 4 player chess board and the fen4 file format used by Chess.com. Any non-trivial computation is likely to have a separate data format, but this generates useful error messages and correctly handles almost every variation of 4 player chess (including tons of non-standard pieces).

Usage

Cargo.toml

[dependencies]
fen4 = "0.7"

fn main(){
    let empty_fen = "R-0,0,0,0-0,0,0,0-0,0,0,0-0,0,0,0-0-14/14/14/14/14/14/14/14/14/14/14/14/14/14";
    let board : Result<fen4::Board,fen4::BoardParseError> = empty_fen.parse();
    println!("{}",board.unwrap());
}

Rust version requirements

fen4 requires rustc version 1.45 or greater. This is for str.strip_prefix; working arount this requirement would move support needed back to around 1.32.