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Tenjiku Shogi. Fire Demons burn surrounding enemies, Generals capture jumping many pieces. (16x16, Cells: 256) [All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2023-02-07 UTC

Replacement capture should work normally. If Fire Dragons try to burn each other, the moving one is destroyed, and won't burn anything else. Just like the Fire Demon in Tenjiku Shogi.

A few minutes ago I was editing the Diagram, slipping in two extra pieces. There might have been a short transient period when the wrong piece had the burning properties. And you might have been so unlucky to try it at exactly that moment. Now it should work.

I was not really happy with the fact that there were two Kirins and Phoenixes on each side; that is very un-shogi-like. The Kirins on b2 / i9 are essential for preventing the initial position to be a forced win. (These play the role of the Eagles in Tenjiku Shogi.) But those on i2 / b9 weren't. So I now replaced those by Phoenixes. (Sorry Jean-Luc, an off-center asymmetry. ;-) ) And replaced the Phoenixes on a2,j2 / a9/j9 by a Side Mover.

This raised the problem of how to make that Side Mover promote. It would be logical to let it promote to Ninja, as these have the same footprint, and the Ninja is stronger. But I had used the Ninja as promoted Minister. So I now changed the Minister's promotion to Rook General (which was not participating before. In Tenjiku Shogi the RG aren't very useful; their fate is to be traded for each other.) That at least makes the promoted Minister stronger than a promoted Gold, which I think it should be, because the Minister is stronger than a Gold. Not that the jumping would be very important in the end-game. But Ministers and Side Movers are very difficult to promote anyway, only stepping forward.

This raises the number of participating types to 27 (20 different moves, of which 3 only obtainable through promotion).


How to Enforce Rules in Game Courier. A tutorial on programming a rule-enforcing preset in the GAME Code language.[All Comments] [Add Comment or Rating]
Fergus Duniho wrote on 2023-02-07 UTC

Is there a reason not to have stalemated just use the pawn subroutine?

Yes, the pawn subroutine is designed for handling actual moves, not potential moves, it sometimes exits the whole program with the die command and an error message, it resets nopvc to 0, and it asks for extra input for incomplete promotion moves.


Square Attrition Chess. Squares can be visited a limited number of times.[All Comments] [Add Comment or Rating]
Thomas wrote on 2023-02-07 UTC

Could an editor please add this description:

"Squares can be visited a limited number of times."

Many thanks.


Tenjiku Shogi. Fire Demons burn surrounding enemies, Generals capture jumping many pieces. (16x16, Cells: 256) [All Comments] [Add Comment or Rating]
Daniel Zacharias wrote on 2023-02-07 UTC

I am tempted to submit the following variant ('Minjiku Shogi'):

Is it intended that the Fire Dragon doesn't burn when capturing another Fire Dragon?


How to Enforce Rules in Game Courier. A tutorial on programming a rule-enforcing preset in the GAME Code language.[All Comments] [Add Comment or Rating]
Daniel Zacharias wrote on 2023-02-07 UTC

Is there a reason not to have stalemated just use the pawn subroutine? I ask because I'm trying to figure out how to implement pieces with non-displacement capture. Is it possible for a function to relocate a piece after it captures?


Home page of The Chess Variant Pages. Homepage of The Chess Variant Pages.[All Comments] [Add Comment or Rating]
Fergus Duniho wrote on 2023-02-07 UTC

Is it conceivable - or already realized - to derive a ranking of attention or interest from the frequency of hits on a variant page?

No, we have not been using hit counters, and I did not find any logs with this information. It might be possible to set something up, but I would like to have a way to ignore robot activity or frequent visitors to the same page, and I'm not sure how to do that.

We already have other measures of popularity. See Which are the Best Chess Variants?.


Paulowich's Chancellor Chess. A proposal to play chancellor chess with chancellors and queens in the corner on 8 by 8 board. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Joe Joyce wrote on 2023-02-07 UTCGood ★★★★

Hi, David! Glad to see you back! This is a nice helpmate and looks like an interesting 'little' game to play - all that power in the corners and a weak center, on a small board! The central rook is a rare feature, or was, a decade or two ago. Who's used it besides Ralph, you, and me, any idea? I don't remember it in even any semi-popular game onsite aside from what you and Ralph have done.


Home page of The Chess Variant Pages. Homepage of The Chess Variant Pages.[All Comments] [Add Comment or Rating]
Fergus Duniho wrote on 2023-02-07 UTC

I have made the 404 page more powerful. While I had previously set it up to give suggestions, it wasn't always doing a good job of that. It now does a better job, and if you enter just about any Chess variant name right after the domain, it should be able to direct you appropriately. Try it out and let me know if there is any way to improve on it.


Gerd Degens wrote on 2023-02-07 UTC

Dear Fergus and dear authors of Chess Variant Pages,

perhaps I have not fully understood the Chess Variant Pages and do not know the possibilities that the system offers. Nevertheless, my question:

Is it conceivable - or already realized - to derive a ranking of attention or interest from the frequency of hits on a variant page? Such a possibility would be very helpful for the authors from my point of view to be able to recognize the appreciation of a variant.

I do not mean the Recognized Chess Variants in alphabetical order, nor the variants marked with 'hearts'. I have in mind a ranking in numerical ascending or descending order based on hits.

Did this already exist, so am I too late or is this an interesting approach?
 


Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2023-02-07 UTC

Yes, non-zero track always keeps track of the coordinates of all piece types, and type N is special by the adjacent squares getting the 'nodes' mark in the 'neighbor' array, so the user can  test it, and do whatever he wants with moves that touch the spellZone in some way. Defining a spell only makes the corresponding action already performed by the Diagram script itself.

I guess I should add some more spell flavors: protect could make pieces standing in the spell zone uncapturable. And hide could make them transparent, allowing any piece to hop over them..


Adam DeWitt wrote on 2023-02-07 UTC

Does trackPieces=N track the pieces around pieces of type N if spell is not set?


Tenjiku Shogi. Fire Demons burn surrounding enemies, Generals capture jumping many pieces. (16x16, Cells: 256) [All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2023-02-07 UTC

I am tempted to submit the following variant ('Minjiku Shogi'):

satellite=minjiku files=10 ranks=12 promoZone=4 maxPromote=13 promoOffset=13 symmetry=rotate graphicsDir=/graphics.dir/alfaeriePNG/ squareSize=50 graphicsType=png lightShade=#ffff80 darkShade=#bf998c rimColor=#077208 holeColor=#077208 coordColor=#ffff40 borders=0 firstRank=0 useMarkers=1 newClick=1 trackPieces=26 spell=burn spellZone=F blastZone=F atomicCapture=0 captureMatrix=/////////10^.6^.6^^.^.10^.6^.6^^.^///////10^.6^.6^^.^.10^.6^.6^^.^///////24^^.^.24^^.^/25^.^.25^.^/@24 hole::::a0-j0 pawn::fW:chinesepawn:a3-j3 silver:::silvergeneral:b1,i1 gold:::goldgeneral:c1,h1 minister::K:guard:e0 kirin:Y:FD:warmachineferz:b2 phoenix:X:WA:elephantwazir:i2 lateral mover:L:sRvW:sidemover:a2,j2 bishop::::e1,f1 rook::::a1,j1 diagonal jumper::B(paf)8cB:vao2:c2,h2 viper::BcabW::g2 cobra::RcabF::d2 queen::::d1 gold:+P::promotedshogipawn: bishop:+S::: rook:+G::: orthogonal jumper:+M:R(paf)8R:cannon: samurai:+Y:NcabK:knightguard: queen:+X::: ninja:+L:FsjRcabW:sidemovergeneral: viper:+B:BcabW:: cobra:+R:RcabF:: minister:+D:K:guard: area jumper::B(paf)8cBWafsKasF:vao:e2 jumping general::Q(paf)8cQ:paovao:f2 value=2000 fire dragon::QafsKasF:dragon:g1 king::K::f0

The Fire Dragon burns all enemies diagonally adjacent to its destination. (Except those that are Fire Dragons.)

Pieces landing diagonally adjacent to an enemy Fire Dragon (including Fire Dragons) get burned instantly.

The jumpers can jump arbitrarily many pieces for capturing, but not equal or higher-ranked jumpers or Kings. They can jump-capture those, or deliver check, though.

Some of the moves of Viper, Cobra, Samurai and Ninja are rifle captures ('igui').

If I can prove that it is not a forced win for white, that is.

Note that it is entirely implemented without user-supplied JavaScript, using the captureMatrix to define the jumper ranking and Dragon burning, and using the trackPieces with spell=burn to cause the passive burning. The shape of the burn zone is controlled through blastZone=F and spellZone=F.


Paulowich's Chancellor Chess. A proposal to play chancellor chess with chancellors and queens in the corner on 8 by 8 board. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Aurelian Florea wrote on 2023-02-07 UTC

That sounds like an interesting little variation!


David Paulowich wrote on 2023-02-06 UTC

We are ants crawling across the chessboard. The endgame K+R versus K+N has been known for a thousand years. I once used it to save a half point early in this century. While the Rook can trap the Knight in some positions, even masters are known to have difficulty finding a win while the clock is ticking. And then there is the following endgame study. A computer tested forced win that goes OVER FIVE HUNDRED MOVES without a piece being captured. Perhaps we should tone down any remarks on the limited scope of chess on 64 squares.

diagram

Black to play, White wins in 517 moves

Marc Bourzutschky and Yakov Konoval, May 2006


David Paulowich wrote on 2023-02-06 UTC

Every day here is Ralph Betza appreciation day. This site would be much poorer without his years of advice and encouragement. Here is a whimsical little game he sent me back around 1998.

diagram

1.g3 d6 2.Cb3 Kd7 3.Nf3 Kc6 4.Ne5 double check and mate.


Borderline. (Updated!) Without pawns, with only one king, capturing opponent's pieces is omitted. (7x7, Cells: 49) [All Comments] [Add Comment or Rating]
Gerd Degens wrote on 2023-02-06 UTC

Okay Ben, sorry for the short rules section.
I added the rule about excluding capturing pieces to the rules section. If there is anything else missing from the rules section, please let me know.

I have played the game many times and did not get the impression that the queen and rook play a decisive role in the final result of the game.

If someone should take the pity to program the game, it will turn out that the strategic component of the game cannot be determined by single pieces.

In the rules I have emphasized: In contrast to all chess variants, the capturing of opposing pieces is excluded. Only the king can be captured.
 


Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on 2023-02-06 UTC

I changed the name of the parameter to specify burning or freezing from curse into spell, and added parameters spellZone and blastZone. The latter can be used to define the area on which the spell (e.g. passive burning) and the active burning works, relative to the tracked or moving piece. They can be given the value K (the default), W, F or N.


Borderline. (Updated!) Without pawns, with only one king, capturing opponent's pieces is omitted. (7x7, Cells: 49) [All Comments] [Add Comment or Rating]
Ben Reiniger wrote on 2023-02-06 UTC

white (blue) can put the king in check on ranks 5-7

I wonder how hard mate will be; you can't get very close to the king while still giving check, so a rook/queen net seems the only way, but with all the other pieces getting in the way...
On the other hand, maybe all the other pieces actually help? A sample mate (preferably one arising from actual play) would be helpful.

In Borderline, capturing pieces is excluded

Oh boy, sorry. Maybe add that all-important bit as the first bulleted Rule so skimmers like me don't miss/forget it from the intro (ugh, and even the short description, maybe it's just me)?


Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on 2023-02-06 UTC

Hi Aurelian. I'm glad you have looked at that link (more than once, presumably) in the past. I meant to say I was pondering about making settings files/('unofficial' presets) for many CV invention ideas of mine, which I was thinking of not trying to publish at least for a while longer. I thought you might be a typical user of CVP site in some ways, so I asked you about the link (featuring a list of possibly played presets on GC) since I know you, and you are paying attention to the present thread (sorry my post is off-topic again).

I was hoping by people (e.g. one being me) playing at least one game with a given 'unofficial' (that is, unpublished) preset of mine, that preset might have at least a slim chance of being stumbled on by someone using that link I just asked you about (then such a someone could play or popularize said CV of mine, if I never got around much to either). Slim chance, yes, but better than if I just left said preset as an unplayed Settings File of mine (people might have an even slimmer chance of finding it that way, I thought, even though I am a known inventor). Publishing presets (plus rules pages) would be best, but that could take ages since for one thing I have over 20 CV invention ideas of mine stored away since 2019 (e.g. there was a limit of 9 submissions at a time [including a given preset or rules page] suddenly introduced during that period - so I just kept letting my ideas pile up).


H. G. Muller wrote on 2023-02-06 UTC

I now improved the piece-value guessing of the Diagram. This used to be based on the 'raw' moves delivered by the move generator, as specified by the XBetza notation. But now that user scripts can add locust victims, either directly or through a promotion code that requests burning, it has become important to first subject the move to this script before determining its power. Before, the values of the Ultima Pincher Pawn, Coordinator and Immobilizer were estimated as next to nothing, because the guessing only saw the mR or mQ part, and the Chameleon was given the same value as the Long Leaper (because the XBetza description was the same, and it did not realize that the leap-capture part was restricted to capturing Long Leapers only).

Guessed values based on the 'cooked' moves were much better; only the Immobilizer was still considered worthless, as even the cooked move never has any captures. So I added an ad-hoc bonus for a piece that puts a spell on its neighbors: 1000 for freezing, 600 for charming and 300 for burning. This makes the Immobilizer the most valuable piece in Ultima. (Which I believe it should be.) The Chameleon might still be underestimated, as no account is taken of the fact that it can freeze an Immobilizer. (Which of course has the repercussion that it then also gets frozen itself. But since the Immobilizer is worth more, this should be worth something to the Chameleon.)

I wonder if I should also support an opportunity for affecting the evaluation through a user script (say xxxEval()). Of course there is already the value=N parameter, which can be used to tune individual piece values. But the current evaluation doesn't take into account whether pieces are frozen. It might be very hard to program something sensible for this, though.


Borderline. (Updated!) Without pawns, with only one king, capturing opponent's pieces is omitted. (7x7, Cells: 49) [All Comments] [Add Comment or Rating]
Gerd Degens wrote on 2023-02-06 UTC

Do you mean white (er...blue?) pieces don't give check except when they are on ranks 4-7?

Almost - on the border line the king cannot be attacked. The king can be put in check only when a piece of one side has crossed the border line. Specifically, white (blue) can put the king in check on ranks 5-7, and black (red) can do so on ranks 3-1.

What do you think about the volatility of facing rooks and queens?

In Borderline, capturing pieces is excluded - except for the king, which must be captured to win the game. In this respect, it is not of particular importance when rooks and queens face each other. Did I understand the question correctly?

Why Boderline? Unlike the variants where the board is complexly changed (this also goes to my own address with Chess 66 or Chess 69) or new pieces with new move possibilities are created, I was looking for a mechanism which has a certain independence and which has not existed before (hopefully). Maybe I succeeded with a game where there is only one king, which both parties want to capture and which can be moved by both parties instead of one of their own pieces. It is also possible that the game has become too simple for many and they do not want to deal with it. We will see.
 


Expansion Chess. (Updated!) Get points per each your piece on other half of board to win. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Ben Reiniger wrote on 2023-02-06 UTC

This reminds me a little of the Unreal-Tournament-inspired Domination Chess.


Borderline. (Updated!) Without pawns, with only one king, capturing opponent's pieces is omitted. (7x7, Cells: 49) [All Comments] [Add Comment or Rating]
Ben Reiniger wrote on 2023-02-06 UTC

Do you mean white (er...blue?) pieces don't give check except when they are on ranks 4-7?

What do you think about the volatility of facing rooks and queens?


Shafran's Hexagonal Chess. Hidden An hexagonal variant from the early 20th century.[All Comments] [Add Comment or Rating]

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Orthodia. (Updated!) Break your orthogonal and diagonal patterns! (Two versions). (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Ben Reiniger wrote on 2023-02-06 UTC

I did some minor editing (fixed the header levels, changed the origin of the berolina pawn, shrank the custom setup image). The en passant rule "same as Horizon" should be explicitly spelled out on this page, please.


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