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Chess. The rules of chess. (8x8, Cells: 64) (Recognized!)[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Sun, Jul 21, 2019 10:52 PM EDT:

Hi H.G.:

Chess Assistant16 doesn't provide the engine that it used for evaluations, regrettably. However I experimented in another way (though not as you would prefer), using Houdini3 (released 2012) as an engine instead. In the exact position in the line culminating with 9.Qc2-c3 that I gave, after some considerable time to look, Houdini3 evaluates the position as 0.15 (or "+=/="), somewhat better than the 0.04 of CA16's engine (as an aside, a disbelieving master friend dared me to play this line as Black against him in any tournament, back in the 1980s, and gallingly I lost the one time I obliged - in spite of previously winning a number of nice master-level games with it, at least sometimes attacking with queens on the board).

I tried replacing the B on c1 with a White knight (a fairly lousy square for a Kt), and this time Houdini3 gave the position as -0.12 (or "=") after considerable time spent. I then tried looking at the same position but with the White knight on d2 (not a great square completely for a knight, either, but it allows White to develop at least a move faster, probably); in this case Houdini3 rated the position as exactly 0.00 (or "="). Note: replacing the Kt on d2 with a dark-squared White bishop gives a position Houdini3 evaluated as 0.17 (or "+=/="); White can formally develop all his pieces a move faster (probably), but he'll want to eventually improve the lot of that piece (White B) now on d2 - though that seems true if a White Kt were there, too.

It may be worth noting that CA16's engine rates the Nimzo-Indian Defence (position after 3...Bf8-b4) as worth 0.07 (or "+=/=") for White, while Houdini3 gives it as 0.16 (or "+=/=") for White. CA16 considers the Nimzo-Indian complex of defences as numerically Black's best defence to 1.Pd2-d4 (i.e. with 'best' play).


Home page of The Chess Variant Pages. Homepage of The Chess Variant Pages.[All Comments] [Add Comment or Rating]
🕸📝Fergus Duniho wrote on Mon, Jul 22, 2019 02:00 PM EDT:

If that is still happening, please provide details on how to replicate the problem. Otherwise, it is hard to know what is going on or how to address it.


StrataChess v1.0. separate Strategic and Tactical gameplay. 2-6 players. Element of Chance. Terrain. Build your own armies.[All Comments] [Add Comment or Rating]
💡📝Prussia General wrote on Mon, Jul 22, 2019 07:13 PM EDT:

@ Moderators - about 2 weeks ago I made some edits to the posting. However this is not yet reflected after I click "Edit the post" so when I edit, I had to work off an older version. How could I get the latest html version from the post? 


Greg Strong wrote on Mon, Jul 22, 2019 08:20 PM EDT:

Try clicking the browser's Refresh button after you click to Edit the Page Contents.  That should update the text.


🕸Fergus Duniho wrote on Mon, Jul 22, 2019 09:40 PM EDT:

I have added a page rule on Cloudflare for bypassing the cache for PHP scripts with the extension .php, leaving one exception for the drawdiagram.php script, which should be cached. This should make scripts for editing content load the latest changes.


100 cell chess Vsevolod Dubrovsky[Subject Thread] [Add Response]
Stanislav Kravchenko wrote on Tue, Jul 23, 2019 04:14 AM EDT:

Hello. Do you have the opportunity to add a description of this type of 100 chess to your site, as well as the opportunity to play it on ChessV?  http://lotos-khv.ru/game/games/chess100.pdf


Greg Strong wrote on Tue, Jul 23, 2019 07:50 AM EDT:

I don't read Russian, but I will ask my wife to take a look.


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]
Erik Lerouge wrote on Tue, Jul 23, 2019 05:19 PM EDT:

Since the old GC preset for Odin's Rune Chess doesn't seem to work anymore, I've created a new one which can be accessed here.


💡📝Gary Gifford wrote on Tue, Jul 23, 2019 05:31 PM EDT:

Many thanks for the fix Erik, it is much appreciated. I was not aware of the issue. Regards, Gary


100 cell chess Vsevolod Dubrovsky[Subject Thread] [Add Response]
H. G. Muller wrote on Wed, Jul 24, 2019 04:25 AM EDT:

Stanislav's name and the fact that he brings this up at all suggests that he reads Russian. So why doesn't he put a discription of this variant on this website?

Google translate doesn't do too bad a job on this, BTW. It seems that this is a patented commercial variant (in Russia) that uses 2-step area-moving Ferz and Wazir as extra pieces, which furthermore aquire Bishop or Rook moves when on the same file as the King. Seems the King itself also has some extra capabilities, but I didn't really read that far.


Interactive diagrams. Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
A. M. DeWitt wrote on Wed, Jul 24, 2019 10:42 AM EDT:

I also noticed another thing about the diagram that I thought was very weird. When the diagram has at least 73 different pieces it starts combining the IDs of the first 6 pieces and replacing the actual ID of the piece with those. Specifically, it does this for the first group of 6, and then it skips two pieces. This process repeats until all 6 IDs have been used (So if the first 6 IDs are 1, 2, 3, 4, 5, and 6, the overwritten IDs would be 11, 12, 13, 14, 15, 16, 21, 22, 23, and so on all the way to 66). For example, the diagram in you page on Maka Dai Dai Shogi replaces the IDs of the Furious Fiend (+Ln), Buddhist Spirit (+DS), Teaching King (+Dv), Crown Prince (+DE), and Emperor (+K) with PP, PGB, PE, PSt, and PT, respectively. This is probably due to a bug in the source code, as I can't see any reason to think that it was intentional. However, this is only a guess. Do you have any suggestions as to what might be causing this?


A. M. DeWitt wrote on Wed, Jul 24, 2019 10:56 AM EDT:

Interestingly, I answered my own question. When looking at the source code, I found this line of code that was responsible for the pieces IDs being overwritten:

for(i=1; i<7; i++) for(j=1; j<7; j++) ids[64+8*i+j] = ids[i] + ids[j]; // combis

When I removed it from the source code, the problem disappeared. Honestly though, I have no idea why this line of code was in there. Logically speaking, wouldn't you want every piece to have the correct ID on it, instead of having the IDs of some pieces overwritten with something else?


💡📝H. G. Muller wrote on Wed, Jul 24, 2019 11:47 AM EDT:

Oops... It seems there has been a mixup of versions at some point. This code was added as a hack to do Peace Chess, where pieces can combine to 'embracing pairs' coexisting on the same square. The IDs for these combinations are generated here automatically. Piece Chess of course only has 6 basic piece types, so for that purpose having the pair codes start at 64 located them well beyond 'nType', with a large safety margin. But I should never have used that hacked version for replacing the script that powers the diagram in general, at least not without modification. There is no reason why the 64 could not be replaced by (say) 400, to not wreck any variants with fewer than 400 piece types. (Without this hack the limit was 512 piece types; the 512 bit is used to indicate piece virginity, the 1024 bit for piece color.)

Thanks for spotting this; I will fix it soon.


StrataChess v1.0. separate Strategic and Tactical gameplay. 2-6 players. Element of Chance. Terrain. Build your own armies.[All Comments] [Add Comment or Rating]
💡📝Prussia General wrote on Fri, Jul 26, 2019 11:56 PM EDT:

Thanks, Fergus!

I added some illustration to better visualize the terrain and initial setup. Next time I'm putting down images of the units, structure and the strategic maps. 


Video Tutorial[Subject Thread] [Add Response]
Stanislav Kravchenko wrote on Tue, Jul 30, 2019 03:40 PM EDT:

Hello. Do you have a clear, detailed video tutorial on creating your own chess pieces and variations? By changing the rules? Is it possible to introduce a diagonal on which some figures could be amplified? Is it possible to introduce pawn castles, so that the pawn could swap places with its own figure standing in front and walking diagonally, that is, with the queen, bishop, wizzard, lion, zanny ...? should only be transformed into the figure that stood on this square, only on the royal square in anyone?


H. G. Muller wrote on Wed, Jul 31, 2019 03:19 AM EDT:

Are you talking about Game Courier now to play it here on-line, or about ChessV? I don't think that in ChessV you can do any of these things; ChessV is not a general configurable variant engine, although it does have a mechanism to configure some (mostly minor) rule variations on the games it supports. And I don't think it is open source. Greg can tell us more about that.

As for Game Courier; I am sure all that is possible there, but in practice you have to be a programmer to be able to write a rule enforcing preset. For this reason the large majority of presets have no rule enforcing at all, and just leave it to the players to enforce the rules. Erroneous rule enforcing is much worse than having no enforcement at all. This should be a good option for the mentioned 100-cell chess, as the location-dependent move rules seem to give it above-average complexity.


Greg Strong wrote on Sat, Aug 3, 2019 01:50 PM EDT:

ChessV is open source and it contains a simple scripting langauge for modifying games or creating new ones.  It is hit-or-miss with what you can do in the scripting language.  Usually, you can add or remove piece types, create new piece types, and select what rules are in effect.  You cannot, however, create new rules with the scripting language at this time.  Most of what you suggest would be new rules and would require you to change the C# source code and recompile.

The download comes with several games that are defined in the scripting language, the most advanced being Butterfly Chess.


8-Piece Chess. (Queen's Army chess, all 8 Back Rank Pieces different).[All Comments] [Add Comment or Rating]
💡📝JT K wrote on Mon, Aug 5, 2019 11:29 PM EDT:

New fairness-based rule to the Randomized version of this game: in the opening setup, the sentry must reside on the c, d, e, or f files.


Change your password[Subject Thread] [Add Response]
🕸Fergus Duniho wrote on Tue, Aug 6, 2019 01:46 PM EDT:

A while ago, one longtime member shared with me an extortion scam email he had received that included his CVP password in it. Today I received a similar email that included my CVP password. If you get such emails, just ignore them. It talks about installing malware on your computer, recording your passwords, recording you through your webcam, then conveniently removing all trace of the malware from your computer. It's just a scam, not a real extortion threat.

I don't think it's a coincidence that the password it included in the email was the one for this site. Until just now, I had not changed it in years, and several years ago, all passwords here were encrypted as MD5 hashes. This is very insecure, because there is a fixed relationship between the original word and the encryption, which allows people to build translation dictionaries that can identify your password from its MD5 hash.

If there were really malware on my computer monitoring my passwords, the hacker could just as easily steal my Paypal password, which would prove lucrative without going through the trouble of trying to blackmail me.

If you have not changed your password in a long time, it will still be encrypted as an MD5 hash. To fix this, sign in and change your password. Your new password will be encrypted in a format that does not have a 1-to-1 relation with the password, and it will be much more secure. While you could keep the same password and just update its encryption, that is what I had done, and this email proved that this was not enough to protect my password. The best thing you can do to protect your password is to change it.


John Lawson wrote on Thu, Aug 8, 2019 07:07 PM EDT:

I've had emails like that, similar to yours.


New game on CV - Horseman Pawns[Subject Thread] [Add Response]
wdtr2 wrote on Sat, Aug 10, 2019 01:42 PM EDT:

https://www.chessvariants.com/play/pbm/play.php?game=Wildebeast_9&settings=default


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]
Erik Lerouge wrote on Sat, Aug 10, 2019 04:31 PM EDT:Excellent ★★★★★

I am currently playing a game of Odin's Rune Chess, and I really like it, as much the rules and gameplay, as the runic theme. The Forest Ox is a terrific piece, maybe too powerful... I like the rather strong Pawns. I generally appreciate modern variants that use non-conventional Pawns, it effectively renews the dynamics of a chess game. And their initial colorboundness isn't a default at all, for me.

I was wondering if Pawn promotion could be integrated in this game - even if it is not necessary since Pawns can go back and the need for new material is less crucial, since the vulnerabiliy of the Kings without moving possibilities makes situations of insufficent material less likely. Promotion possibilities should be limited, since Pawns can reach the last rank in only four moves; for example, they could only promote to previously captured pieces of his own colour; or there could be limitations to the maximum number of pieces of each type present on the board (4 Valkyries, and 4 Forest Oxen, for example - which is already a lot). One can also think of the opportunity to permit the promotion to King (here too, the maximum number must be limited or promotion be only to previously captured Kings). But the game plays already well, I don't think it needs a promotion rule. I was just wondering how promotion could affect the gameplay, and if it could be interessant as a variant.

Edit: my comment about the possibility of promotion wasn't very pertinent. Promotion doesn't make much sense in this game.


Game Courier. PHP script for playing Chess variants online.[All Comments] [Add Comment or Rating]
Joe Joyce wrote on Fri, Aug 16, 2019 10:37 PM EDT:

This completed game from Game Courier has errored out. Can it be recovered? Thanks, Joe

https://www.chessvariants.com/play/pbm/play.php?game=Janus%20Chess&log=joejoyce-david_64-2008-52-143


Sac Chess. Game with 60 pieces. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sat, Aug 17, 2019 03:05 PM EDT:

Sac Chess still seems to be holding up well in practical testing on Game Courier, I'm happy to see.

A while back I toyed with the idea of making novel spinoff variant(s) that included the use of N+Guard+Bishop (technically NWB) compound pieces (I've called them Freemasons) and also what I've called Ships, that is N+Guard+Rook (technically NFR) compound pieces (using either an 8x10 or 12x12 board). I had, subsequent to inventing Sac Chess, had the feeling these two triple compound pieces perhaps ought to have been included in a Sac Chess-like game, somehow, as they perhaps logically complete the set of thematic compound pieces added to the standard FIDE piece types. On the other hand, there seems to be no precedent for the use of these triple compound piece types in previously fairly-widely played CVs, e.g. shogi includes the promoted B & R types, at least, while I recall Amazons had been fairly popular, in a variant of chess played in Russia long(?) ago - even centaurs have been employed (Courier-Spiel). So, I don't feel the urge to use the Freemason and Ship compounds as strongly as I once did, as I now see Sac Chess clearly uses the 'classic' compound pieces, as Carlos once put it.

A side issue arising from all this that occured to me is: what values should the Freemason and Ship piece types have? If we note that computer studies place Archbishops (let alone Chancellors) very close to a Q in value, and also place Amazon=Q+N in value (only), at least on 8x8, there doesn't seem much room to put Freemasons and Ships between Archbishops (or Chancellors) and Amazons on a numerical value scale, one might guess (at first thought anyway). I'm not sure what I'd speculate any future computer studies might (approximately) give for the values of Freemasons or Ships, but my own tentative valuation of an Amazon (as =Q+N+P) gives more room to fit Freemasons and Ships on a values scale (e.g. for armies on 8x8 or 10x10), at least. [edit: Fwiw, for 10x10 my own tentative estimates place Chancellor=N+R+P=3+5.5+1=9.5; Amazon=Q+N+P=10+3+1=14 and Ship=(N+F+P)+R+P=(3+0.75+1)+5.5+1=11.25, for example; if I only changed the value of an Amazon, to be equal to Q+N=10+3=13, then its value would seemingly be too close to that of a Ship's.]


SacriliChess. Members-Only A point-buy chess format that allows promotions for all pieces.[All Comments] [Add Comment or Rating]

Since this comment is for a page that has not been published yet, you must be signed in to read it.

MZmegamix[All Comments] [Add Comment or Rating]
Ben Reiniger wrote on Mon, Aug 19, 2019 12:38 PM EDT:

The relevant file seems to be missing.  (Also, I don't have Zillions, so another editor would need to verify that the file works should it be uploaded.)


Wildebeast9. A Variant of Wildebeast Chess.[All Comments] [Add Comment or Rating]
Chris Chradle wrote on Thu, Aug 22, 2019 05:45 PM EDT:Good ★★★★

I think it's a fusion between Wildbeast and Xhess not XChess. XChess is a variation with an hourglass.

 

Chris


H. G. Muller wrote on Thu, Aug 22, 2019 05:53 PM EDT:

And a Shogi board is 9x9, not 9x10. (Xiangqi is 9x10, but this also doesn't qualify as a Xiangqi board, which has a Palace and a River.)


Greg Strong wrote on Thu, Aug 22, 2019 07:34 PM EDT:

And, not to pile on, but it's Wildebeest not Wildebeast.  (I can rename the game in the database if you would like.)


Erik Lerouge wrote on Fri, Aug 23, 2019 03:58 AM EDT:

The orthography 'Wildebeast' could be intentional from its author.


💡📝wdtr2 wrote on Sat, Aug 24, 2019 03:18 AM EDT:

Hello all.  
Greg: Correction made on documentation.
Thank you for the rename offer, but I would like to call mine Wildebeast.
HG: Removal of 9x9 on the documentation.
Chris: Xhess correction made.
Erik: I added your game to my introduction

 


Greg Strong wrote on Sat, Aug 24, 2019 11:25 AM EDT:

Thank you.  This looks interesting.  I'll send out a GC invite so I can try it.

I assume by the way the promotion rule is worded that if you do not have a queen you must promote to a queen and cannot choose wildebeast.  Is that correct?

Also, I see the GC Preset is named Wildebeast_9 with an underscore.  Would you mind saving another copy without the underscore for consistency?


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