Yes this is brilliant game, but u know u can play this game under a few variant rules, besides actually capturing the king, u can also play this game using the standard checkmate style.
Steve Nichols has a site where u can download a nice program that plays these variants, http://www.chaturanga.com/
Playing the 'double mate' variant, red and yellow play of course against black and green. Now how this works is, if for instance, red army mates black, then, black now cannot move as the different armies make their moves around the board (order is red, black, yellow, green).
So red would move, then yellow, then green, and so forth. Because each army has only 3 major pieces, this can often tie up the pieces and make them unable to move, if they want to 'hold' the mate on the board. Yellow would be able to attack the non-moving mated black army, and capture pieces, but this of course could lead the release of mate on black, but if enough pieces are taken then this of course can be ok. Green is not going to stand around and do nothing, and would try to attack red to try to release the mate on the black army, or even try to mate yellow!! If green can release black from mate, then black would again be able to start to make moves!
Exciting gameplay indeed. I did play a game with a friend, and early in the game, his red army did mate my black side, but, on his very next move as red, his ONLY legal move was to move his ship, which released my black army from mate, and, by the way, haha, i went on to win the game.
I play this game with a few friends and all agree this 'double mate' variant is the best way to play.
ok, giving this game an excellent rating because of your effort to make this a zrf in the style of playing it with no dice, and, because this is my fav game too hehe, well done :)