The Go Text Protocol

A communication protocol used to control Go-playing programs. Gomill uses only GTP version 2, which is specified at

(As of April 2017, the specification describes itself as a draft, but it has remained stable for several years and is widely implemented.)


The Smart Game Format

A text-based file format used for storing Go game records.

Gomill uses version FF[4], which is specified at

Additional points awarded to White in final scoring.
simple ko
A Go rule prohibiting repetition of the immediately-preceding position.