"A chess-program :o) It's an experimental one: not because of the bugs, but because of the algorithms used. Not just one based on the shannon-algorithm, but several. And, the most important one; it is not brute force." (http://www.vanheusden.com/cpp1/) Unfortunately, seems to be only available as a binary.
Created attachment 69221 [details] cpp1-bin-0.1.ebuild
with apologies this bug is being closed as last update from upstream was over 3 years ago The software is still on the same version as it was at the time this ebuild was written. When upstream becomes active again feel free to reopen this bug.