George Duke wrote on Wed, Feb 17, 2010 05:27 PM UTC:
With unique stamp of creativity in Zabel Pawn, still this is similar to Mecklenburg Chess of year 1973:
http://www.chessvariants.org/index/displaycomment.php?commentid=7437.
Basically with its difference Zabel-Schach facilitates promotion. Underpromotion earlier figures in Buczo's above and below, http://chessvariants.org/index/displaycomment.php?commentid=25067. Monkeying with promotion, Grand Chess allows optional promotion earlier, http://www.chessvariants.org/large.dir/freeling.html, as do many copycats of that Grand Chess methodology. Another one, Falcon Chess 100 uses two promotion zones having different promotees, http://www.chessvariants.org/large.dir/falcon100.html. Putting more promotion ideas here are Knight Mare,
http://www.chessvariants.org/large.dir/knightmare.html, and Gilman's gone overboard Weltschach, where the longer trek means the more ranking promotee accessible,
http://www.chessvariants.org/index/msdisplay.php?itemid=MSweltschach.
And Lavieri's Promoter you own, the opponent is unlikely ever to exercise his prerogative to capture: http://www.chessvariants.org/index/msdisplay.php?itemid=MSchesswithpromo.