Game-Go Go, on a 9x9, 13x13 or 19x19 board, under the Japanese rules of 1989. The board, the chains, the liberties and the search are in C, behind a published ABI in include/go_abi.h; the Perl is the rules, the notation and the bot's policy. This version carries the board and only the board: points, colours, chains, exact liberty counts, a zobrist hash and a packed position. Nothing in it judges a move, so there is no ko, no capture and no suicide rule yet. The engine is perl-free, so the same C compiles into the XS, into a plain program, or to wasm. This is an XS distribution with no pure-Perl fallback, so it needs a working compiler. INSTALLATION To install this module, run the following commands: perl Makefile.PL make make test make install LICENSE AND COPYRIGHT This software is Copyright (c) 2026 by LNATION . This is free software, licensed under: The Artistic License 2.0 (GPL Compatible)