Jörg Knappen wrote on Tue, Jul 5, 2011 02:05 PM UTC:Excellent ★★★★★
I am updating the rating to excellent, because seeing the elegance of the knave and debtor pieces is obviously a non-trivial task. In fact, Abdul-Rahman Sibahi and Joe Joyce discussed the pieces (without naming them) here briefly
http://www.chessvariants.org/index/listcomments.php?itemid=MPcomplementarit
but they didn't see that they are exceptional. Perhaps it needs some hexagonal thinking to see it.