are just slightly simplified and more recognizable as symbol ... about like
the step from kanji-scripture to hiragana, or take it egypt :) still 'flat' pieces as
it's due and contrary to caissus the geometrics are not the same, let go the river ~*~
invented end of the 19th century by Ben R Foster
appears as an appropriate pendant to janus chess ...
more infos here - onto that here for a 9x9 variation ...
contains also infos on 4 Player Traditional Chess and, The Emperor Game ... ~*~