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On Designing Good Chess Variants. Design goals and design principles for creating Chess variants.[All Comments] [Add Comment or Rating]
Jörg Knappen wrote on Mon, Mar 5, 2012 01:48 PM UTC:
Here's my interpretation of A. Blacks criterion 17:

17. Pieces moves like chess pieces can move.

(a) Pieces move like leapers (true leapers or 'lame' leapers), riders, chinese or korean cannons, or combinations of those.

(b) Pieces have highly symmetric movement patterns (full 90 degrees rotational and reflectional symmetry for all non-pawn pieces, reflectional symmetry with different forward and backwards movement [like in the Shogi gold and silver generals] counts as a mild violation of this)

(c) Pieces move and capture the same way or their move and capture are at least 'similar' in some sense (I consider the pawn movement and capture similar because of forwardness and shortrangeness, also the pieces of separate realm chess or chinese cannons are similar in movement and capture. Frank Maus' knibis and bishight aren't). 

This allow much more pieces than just the traditional FIDEs ...