Simple Rules
Simple Rules - http://home.snafu.de/jasiek/simple.html
Tromp-Taylor Rules - http://homepages.cwi.nl/~tromp/go.html
Elementary Rules - http://home.snafu.de/jasiek/element.html
International Rules without alternatives - http://home.snafu.de/jasiek/int.html
Simplified Ing Rules - http://home.snafu.de/jasiek/siming.html