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Chess with Different Armies. Betza's classic variant where white and black play with different sets of pieces. (Recognized!)[All Comments] [Add Comment or Rating]
H. G. Muller wrote on Thu, Mar 1, 2012 10:18 PM UTC:
K+R vs K+WD has the signature of a general draw, although there is an appreciable number of lengthy wins (upto 32 moves to force conversion). With white to move 62% is won, with black to move only 13%. The latter number is far mor than the expected number of forks and skewers, and indeed only about 2% of the btm positions are quick tactical wins (conversion within 3 moves). Most of the other won btm positions take at least 10 moves to conversion.

So there is plenty of trouble for the WD. Presumably mainly when the black King is pushed against the edge by the white King, although I did not check that.

KRKN has about 9% btm wins, and about 5% are within 3 moves (presumably more than with WD because R can pin N from close range, while against WD it has to keep a distance), and although wins can take up to 26 move, the number of lengthy wins tails off pretty fast, and there there is no pronounced bump in the DTC histogram at long DTC. So the character is is definitely different.