Comments by JorgKnappen
What has happened to the diagrams here? They show 10x19 boards with a lot of blue non-squares to me.
Here is one genuine German Franz Tressan from Verden an der Aller: https://portal.dnb.de/opac.htm?method=simpleSearch&cqlMode=true&query=idn%3D110743078X
My pieces are free to reuse and I feel flattered that you like them.
And the use of RNF and BNW in Pocket Mutation Chess by Michael Nelson predates all of this, just their names a purely technical there (SuperCardinal and SuperChancellor). But I agree, these pieces play well on big boards.
I find the square board tags quite handy, they allow a quick navigation to other games on the same board. Going to the game info page and selecting the right category (best working is the number of cells in the case of square boards) takes longer.
And I really love the piece tags.
As far as I can see there is no rule that forbids moving the King back to the place where it came from (at least, when the King move wasn't motivated by escaping check). So a situation can occur where the two players just move the King between two squares in an endless loop and the game makes no progress.
Well, you must move the King into the other camp to be able to give check and checkmate. You also need to occupy the squares on the borderline such that the King cannot escape to that line (this is possible, because the pieces cannot by captured). A defense against this is just to push the King back. A defensive player can always hold a draw by pushing the King back to the borderline whenever the offensive player pushes it into the camp where it can be hurt by check and checkmate.
I think I understand the game better now, but here is the next rule question:
What about simultaneous double check by red and blue, e.g., Blue moves the Knight to give both check and a discovered check by a red line piece.
Is this a legal move, and if it is, what are its consequences? Can red now take the King and win, or must the red player move the King out of check? If the King is checkmated, who scores the win in this case, or will it be a draw?
The name of the author is still kind of a mystery. I think the author is best identified as "L. Tressan" (Ludwig is obviously an interpolation and not really sourced). In the comments on Sultan's game (Sultanspiel) we had a longer discussion on the mysterious "L. Tressan".
Also, the title of Tressan's book contains a typo, it should read "seine" instead of "siene".
I think movement diagrams from the light blue squares would be a good addition to the game description, those squares are qualitatively different from the dark blue and white ones.
In addition, I think the coordinate system is unnecessary complicated, the number should number horizontal rows (each row starts with light blue fields). In this case, they will run up to eight for the top row of light blue fields, but there are no dark blue nor white fields in row 8.
The complicated notation system does not add anything to the game (it can be played without coordinates, after all).
This piece (Nr. 87 "King Cheetah") is featured as Pegasus in Beastmaster Chess by Glenn Overby II (2002)
The KC piece is named General in Paulovits' game from 1890.
EDIT: Corrected spelling of Paulovits
@H.G.Muller Thank you for the interactive diagram!
There is an alternative German plural to Mann, it is Mann/Mannen with an archaic flavour and a restriction in meaning, it is a soldier or a servant of the king only, but not any male human being.
The Evangelist has also the can-mate property because it covers all range-1 squares like a Mann does, and King+Mann can mate a lone King.
X-Chess by Jeremy Gabriel Good featured the Harvestman among other pieces of Seenschach, but this is the only other game I am aware of.
Hm... what should a rotary counterpart of the Harvestman be: Ferz, followed by Girlscout (aka Crooked Rook)? This is almost the same as a Girlscout lacking the initial Wazir steps and I doubt that this piece was ever used in Chess Variant.
Yes, I think so, the Imam covers a stretch of three adjacent squares (1,2)(1,3)(1,4) and can manœuvre with a Wazir move, this should be sufficient for a checkmate. One has to be careful not to stalemate the lone King, because the Harvestman component covers so many squares.
The WNC is featured as Teutonic Knight in Teutonic Knights Chess.
@HaruN Y: Thanks for the interactive diagram here and for Zabel Chess.
Interesting variant with innovative promotion rules.
The rules are inclomplete with respect to double check and pincers on both Kings, it should be specified what happens than. Technically, the fake King is in check but not necessarily checkmated in such a situation.
The rare case of double checkmate should also have a special mention in the rules: Is this the end of the game with a win for the checkmating party, or will the game continue with the fake King demoted to a pawn and the checkmating piece being removed?
Great that this piece of work is finally out! I have waited for it for more than a decade ...
There is a small question: Why did you rename the "Teutonic Knight" to "Eutonic Knight"? Is there a specific reason for that, or is it a typo (typical cut-and-paste error)?
There is a questionmark on the date of the "Seeping Switchers" army. It was posted here as a web page on 7 January 2002, but I developed it earlier in 2001 in the old comment systems of this site, so the date should be 2001.
PS: Originally, the army was named "Sweeping Switchers" but due to a typographical error that I didn't spot in the correction cycle it became "Seeping Switchers".
I nominate the game Jetan by Edgar Rice Burroghs, https://www.chessvariants.com/other.dir/jetan.html
It is tagged "groundbreaking" and I totally agree with this tagging.
I second Seirawan Chess for its innovative mechanism of "gating-in" new pieces.
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This green/white layout looks good and has no annoying flaws.