1 - John Stanback developed the original GNU Chess.
2 - Matthias Mutz worked on the initial version of GNU Shogi.
3 - Michael Vanier maintained GNU Shogi up to version 1.3.2.
4 - Luis Felipe Strano Moraes maintained GNU Shogi up to version 1.4.0.
5 - Yann Dirson is the current maintainer.