This entire distribution (except the games and the BSD db routines, I can't license them: they aren't mine) is copylefted. See the file "GPL" for terms. goo is a simple approach to computerized go. It uses machine learning. Interesting results can be found by fiddling with the evaluation function. There's definitely room for improvement. I have one particular improvement in mind - maybe some rainy weekend I'll make it and cut another release. This is version 1.0.