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I posted this implementation to the Shogi Variants Group at Yahoo! and received not one single negative response. The 3D interpretations of the Gold and Silver Generals are logical, and actually play very nicely. A pure extrapolation would result in the Silver General being more powerful than the Gold. Example: The Siver steps only orthogonally forward and any diagonal. This would result in 13 possible 3D moves. The General steps only orthogonal and forward diagonal. This would result in 10 possible 3D moves. This does not include the triagonal steps which would be 8 for the Silver and 4 for the Gold, further exaggerating the power difference. It was necessary that the Silver be somewhat weaker than the General since it was to promote to it. So, I gave the Gold General all the above moves plus the 4 side diagonals. This allowed the Gold to create a 2x3 area above and below, aiding in cornering that slippery 3D King during the end-game. And so, I gave the Silver only the ability to change level with the triagonal step. Thus giving the player a good piece but one that would need to be promoted.