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Odin's Rune Chess. A game inspired by Carl Jung's concept of synchronicity, runes, and Nordic Mythology. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
Michael Nelson wrote on Sat, Mar 12, 2005 07:09 PM UTC:
Garry,

I have a working ZRF implementing all the rules as you have given them on
the web page. Please send me the graphics files and I will finish the
implementation.

The Valkyrie swap is evaluated correctly when involving non-royal pieces,
only the swap with a King is problematic. The bug is in the evaluation of
win/loss/draw conditions within the consideration of the move: removing a
royal piece temporarily to replace it elsewhere is deemed a loss, whereas
after the move is executed and Zillions checks the conditions, it is
handled correctly. In other words, during a swap move, Zillions mistakenly
thinks the temporary disappearance of the King while it is being swapped to
another square is permanent.

In any case, the indirect capture target technique solves the problem.

One question: is it legal to use the Valkyrie swap to make a null move?
That is if a Valkyrie on c6 swaps the other Valkyrie at c9 back to c6,
then you have made a move but the position on the board hasn't changed.

In most CV's the answer is 'No', so I have coded accordingly: a
Valkyrie cannot swap positions with the other Valkyrie and a King using a
Valkyrie move connot swap positions with the other King.

If you intend to allow null moves it is trivially simple to change the
code to allow them.

💡📝Gary Gifford wrote on Sat, Mar 12, 2005 04:55 PM UTC:
I don't know much about ZRFs (other than I have been impressed by many) but in Odin's Rune Chess if the Valkyrie capture/relocation of its own Kings is seen as a 'negative' capture to be avoided, then wouldn't Valkyrie capture/relocates of other friendly pieces also pose a programming problem? Also, would Zillions willingly move one King into Check on purpose as part of a combination to win the game or even material? I would think that the Valkryie aspect could possibly be seen as a 'special castling' condition available for all friendly pieces. And since Kings must be captured, perhaps the entire 'Check' aspect can be witheld from the ZRF... after all, the checks are essentially meaningless and it is actually not wise to announce check. It is the capture of the second King that really counts. Again, I know nothing of Zillions ZRF coding, but peraps some of my comments will trigger some good code thought. If anyone wants ODIN gif images for gaming use let me know and I'll send them after adding transparent green to the existing gifs. Best regards. Sincerely, Gary K. Gifford

Michael Nelson wrote on Fri, Mar 11, 2005 06:25 PM UTC:
I will start development this weekend. I can use a coventional board and
piece graphics while I'm perfecting the implementation and substitute the
final graphics later. I might be able to derive the images I need from the
picture on the Web page, which looks really good.

By the way, Peter, I should have credited you with the indirect capture
target technique which I learned from you. It simplifies many complex
situtations as well as the king swap issue. It is, for example, essential
to the implementation of the Decima 10-points condition.

Roberto Lavieri wrote on Fri, Mar 11, 2005 06:15 PM UTC:
Mike, you can try a ZRF, I was planning make the code, but I´m afraid I can´t do that in the next 3-4 weeks, because I am going to be a bit busy. If yoy try, I can give you a hand if you need it, and I can also contribute sending images for the game, but I´ll need some time to do that, let´s see if I can find some free time.

Peter Aronson wrote on Fri, Mar 11, 2005 06:09 PM UTC:
<i><blockquote> If anyone is, you will need some code trickery--a straight forward 'capture both kings' type win condition will make Zillions very hesistant to use the Valkyrie swap move on a King--during move evaluation, Zillions erroneously considers this to be a loss of the King, though it treats the move correctly when actually determining if the win condition is achieved. </blockquote></i> <p> The easiest way around this is to not allow the Valkyrie to swap with the friendly King, but rather, allow the King the ability to swap with a friendly Valkyrie -- this avoids panicing Zillions. <p> Another approach (used in Rococo.zrf) is to use an indirect capture target piece that is on a dummy square, and have capturing the King capture that piece as well. Since the swap move wouldn't have the code to capture the off-board target piece, then again, Zillions wouldn't panic at the swap move.

Michael Nelson wrote on Fri, Mar 11, 2005 05:27 PM UTC:
I am witholding a rating until I get a chance to playtest it, but unless
there is some hidden flaw I expect to rate it 'excellent'. The game
concept is very innovative and I particulaly like those quirky Pawns.

Is anyone working on a ZRF for this game? If not, I will try it myself. 

If anyone is, you will need some code trickery--a straight forward
'capture both kings' type win condition will make Zillions very
hesistant to use the Valkyrie swap move on a King--during move evaluation,
Zillions erroneously considers this to be a loss of the King, though it
treats the move correctly when actually determining if the win condition
is achieved. Email me for details.

Charles Gilman wrote on Wed, Mar 2, 2005 07:44 AM UTC:Good ★★★★
The piece represented by the 'Ethel' rune could be considered a Crooked
Boar. The Boar in my variant Truffle Hunt Chess is also a colourbound
enhanced Ferz on the Pawn rank, but enhanced by the forward moves of the
Elephant with some pieces blocking it if on the intermediate cell. I
interpret the crooked form of a move along either forward diagonal as
alternating between the two, thus a Crooked Mitre would have half the
Ferz
moves, but only a quarter of the Crooked Bishop's non-Ferz moves.
	As a matter of general interest, my own use of Valkyrie is for a 3d
piece, a Rook that can also move exactly 2 cells diagonally OR
triagonally.

Gary Gifford wrote on Tue, Mar 1, 2005 05:45 PM UTC:
Thanks to all who have commented on this new game. Comments are much appreciated. Here I wish to respectfully address two piece issues that were raised. (1) One comment was that the colorbound pawns were likely not a good idea. I need to point out that the pawns are not truly color-bound because Valkyries can rellocate friendly pawns to an opposite color square. But aside from the Valkyrie factor, the Ethel Pawns are much like little strange Bishops confined to a Runic vector. But, that was part of the game design, i.e., to adhere to Runic images and interpretation. [note: the Ethel Pawns are certainly far more free than the Chinese Chess Elephants and Guards]. Anyway, the Ethel pawns are only truly color-bound after the player losses both Valkries. In Chess we often hear of 'Opposite colored Bishop endings' which are typically drawish. In Odin's Rune Chess we can now experience 'opposite color pawn endings.' Of course, Valkries can change these opposite color endings. (2) There was also a comment about the Kings' dependency on adjacent pieces. Indeed, the Kings can be very strong or completely powerless. The writer stated that players may go after non-royal pieces to weaken the Kings. But is that a bad thing? Now players may have to treat other pieces, at times, with the same respect usually reserved for Kings. I think it makes for richer strategic and tactical possibilities. Time shall tell. Regards to all, Gary K. Gifford

Charles Gilman wrote on Tue, Mar 1, 2005 09:55 AM UTC:Good ★★★★
The piece represented by the 'Ethel' rune could be considered a Crooked
Boar. The Boar in my variant Truffle Hunt Chess is also a colourbound
enhanced Ferz on the Pawn rank, but enhanced by the forward moves of the
Elephant with some pieces blocking it if on the intermediate cell. I
interpret the crooked form of a move along either forward diagonal as
alternating between the two, thus a Crooked Mitre would have half the
Ferz
moves, but only a quarter of the Crooked Bishop's non-Ferz moves.
	As a matter of general interest, my own use of Valkyrie is for a 3d
piece, a Rook that can also move exactly 2 cells diagonally OR
triagonally.

David Paulowich wrote on Mon, Feb 28, 2005 08:44 PM UTC:
How can one describe the (colorbound) Pawns of Odin’s Rune Chess? Well, a Silver General in Shogi has 5 of the 8 moves of a King. A Pawn in this game has 5 of the 12 moves of a Jester in Sidney LeVasseur's Kings Court Chess. A truly exciting innovation.

Roberto Lavieri wrote on Mon, Feb 28, 2005 07:11 PM UTC:Excellent ★★★★★
Beautiful!. I have to play a test game to take a better idea. Is it going to be a ZRF available?. If not, I can try codifying it, but I´ll need a couple of weeks, I have some other things to do at first.

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