📝H. G. Muller wrote on Sun, Jul 7, 2019 07:16 AM UTC:
Well, that we today play this game both with and without drops is only out of ignorance. At the time this game was invented the rules were of course known, and nothing would have been optional about them. So it would either have been one or the other always. Based on the power of the pieces I am now convinced that the original rules would have included piece drops. And with piece drops there is no such thing as (meta-)color binding; any piece can get captured, and re-appear on any color it wants. Also note that the Heavenly Horse is a promoted piece. Because of the promotion zone being 3 ranks deep and the way the Liberated Horse moves you can promote on 3 of the 4 possible meta-colors.
Well, that we today play this game both with and without drops is only out of ignorance. At the time this game was invented the rules were of course known, and nothing would have been optional about them. So it would either have been one or the other always. Based on the power of the pieces I am now convinced that the original rules would have included piece drops. And with piece drops there is no such thing as (meta-)color binding; any piece can get captured, and re-appear on any color it wants. Also note that the Heavenly Horse is a promoted piece. Because of the promotion zone being 3 ranks deep and the way the Liberated Horse moves you can promote on 3 of the 4 possible meta-colors.