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The new setup is mistaken, the Knights are between the Rooks and the Bishops, and the Bishops are on different colours, compare p. 77 in the book by L. Tressan here: https://books.google.de/books?id=n64UAAAAYAAJ&printsec=frontcover&hl=de&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
The Emperor's Game
Thank you for the correction. I have updated both this page and the Sultan's Game page.
The name of the German author is Tressau, not Tressan. I know, it's confusing because the original book was written in gothic script and the u and the n are very similar (although slightly different). Here is a u, so Tressau.
I have rewritten most of this page with updated information from Jean-Louis Cazaux's excellent new book A World of Chess, co-authored with Rick Knowlton. The previous version had incorrectly identified the author of a book on chess variants as the game's inventor. Additional historical information has also been added.
L. Tressan, or perhaps Tressau, also invented a slightly larger variant, the Sultan's Game, on this website at http://www.chessvariants.com/large.dir/sultan.html .
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Oops, sorry. I just cloned the diagram for The Sultan's Game and removed the Marshall, without realizing the Sultan's game swaps the a-side N and B compared to their orthodox position. I fixed this now. For the castling I still have to figure out a solution.