The organizers of the Gifu Challenge have announced that they will use a new server-based protocol named SBCP instead of the Modem Protocol in future tournaments. A description of the protocol can be found here: http://igo.bz/cgf/CGF2004-Protocol.txt
I am not happy that they did not choose GTP, it would have been a good choice for all the requirements listed in the their specification.
Programmers that already use GTP for regression testing and interfacing the engine to a user interface will have to support another protocol or use a program translating the protocols.
I know that at least 4 Go programs which participated in tournaments already support GTP: GnuGo, Explorer, NeuroGo and Golois (anyone knows more?).
- Markus