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Shako_Balbo. Game with Diamond Shape Board.[All Comments] [Add Comment or Rating]
Greg Strong wrote on Fri, Sep 25, 2020 09:13 PM UTC:Excellent ★★★★★

This is an excellent chess variant, and is one of my favorites. I think it plays better than either of the games from which it is derived. The starting position is carefully considered, allowing a wide variety of different openings.

The rook should still be worth slightly more than the bishop on this board but it is very close. I performed the mobility calculation. With a 30% board occcupancy, the rook's average mobility is 9.8 whereas the bishop's is 9.2. And the mobility of the rook increases faster than that of the bishop as the board clears out.


Home page of The Chess Variant Pages. Homepage of The Chess Variant Pages.[All Comments] [Add Comment or Rating]
Dermot wrote on Thu, Sep 24, 2020 11:25 AM UTC:Excellent ★★★★★

This page is 100% going to crash soon due to traffic from SUSD viewers!


Diagonal Chess. Board turned 45 degrees. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Brian Wagner wrote on Wed, Sep 23, 2020 03:39 AM UTC:Excellent ★★★★★

Very similar to Wagner Chess: https://github.com/brianthetall/wagnerChess


Interactive diagrams. Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
💡📝H. G. Muller wrote on Sat, Aug 1, 2020 07:32 AM UTC in reply to Greg Strong from 01:22 AM:Excellent ★★★★★

You should be able to do this by defining Pawn and Ferz as the first two pieces, setting maxPromote=2, promoZone=1, and promoChoice=W (assuming W is the ID of the War Elephant). It might still want you to indicate the 'choice' by clicking on the War Elephant in the table (which will then be highlighted in blue). But it only requires a choice when the table is opened anyway. If the table is closed it always promotes to the default piece, which is the first ID of the promoChoice string. If there is never any choice, there is no reason to open the table.

The Play-Test Applet doesn't offer an opportunity to specify a maxPromote parameter different from 1. In western Chess variants it is very rare that there is more than one promoting piece, and in the cases I knew the promotion rules for the non-Pawns are then often special. (E.g. more Shogi-like, where there is a fixed promoted form.) The Play-Test Applet has no provision for defining Shogi-type promotions (which would be controlled by the diagram parameters maxPromote and and promoOffset, rather than promoChoice.)

Such mixed promotion rules are not really supported by the Diagram proper; the Diagram can be augmented with a user-defined JavaScript function WeirdPromotion to handle such cases. This is what I used for Chess and a Half: as far as the Diagram is concerned only Pawns promote, and it enforces the promoChoice setting on those. Promotion of the other pieces is handled by having WeirdPromotion recognize when they should promote, and return the promoted version in that case. I also use that for implementing 'contageon' in Maka Dai Dai Shogi.

It is always a hard call what to include in an interface to keep it user-friendly; I don't want to deter prospective users with an enormous list of options they would almost never need.

I have been thinking for how the need for using a custom WeirdPromotion script could be reduced. I could for instance introduce a parameter contageon that would decare a list of pieces that should be treated as contageous, and by default make royal pieces immune to that. (Or also introduce a parameter immune.) And I could make mixed promotions standard by having the Diagram obey the promoChoice parameter for the first piece (presumably Pawn) even when promoOffset is non-zero, if the promoChoice is non-empty or different from a single +.


Greg Strong wrote on Sat, Aug 1, 2020 01:22 AM UTC:Excellent ★★★★★

Can the ID support Shatranj Kamil X? Specifically the promotion rules - Pawn and Ferz both have mandatory promotion to War Elephant on the last rank. I read the promotion section but its not obvious to me how to do this.

The interactive diagrams are an awesome innovation by the way!


Victorian Chess. Capablanca variant with the most powerful pieces starting on the outside. (10x8, Cells: 80) [All Comments] [Add Comment or Rating]
📝Greg Strong wrote on Mon, Jul 13, 2020 04:42 PM UTC:Good ★★★★

I updated this page heavily...

  • Added graphic of setup (was just ASCII)
  • Updated intro to provide detail about chronology of invention
  • Changed format to be more consistent with other game description pages
  • Added information about Game Courier play/computer play
  • Added interactive diagram

Shatranj Kamil (64). Modern Shatranj based variant on 8 by 8 board with new pieces. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Greg Strong wrote on Sun, Jul 12, 2020 12:06 AM UTC:Excellent ★★★★★

I've made several updates to this page. The HTML had a number of issues, (unclosed tags and the like), although they mostly weren't obvious to readers. I also reformatted it to better resemble our typical game descriptions and edited the text to be clearer. The Computer Play and Equipment sections have also been updated to reflect what is (and is not) currently available.

I will try to post a more in-depth review when I have some time to write one, but for now, suffice it to say this game plays very well and I do not hesitate to rate it Excellent.


Brouhaha. Like Chess, but it really brings the ruckus! (8x8, Cells: 72) [All Comments] [Add Comment or Rating]
Jean-Louis Cazaux wrote on Wed, Jul 1, 2020 08:34 PM UTC:Good ★★★★

I have 2 questions about the brouhaha squares:

1) What is the advantage of allowing a capture on a brouhaha square? Spontaneously, I find this strange: I understood that such a square hosts a piece until it is activated and enter into play, then the square disapears. Then, this square is not part of the play area really. So, I wouldn't have allowed a capture on it at all. Maybe there is something I don't see.

2) Why this name of "brouhaha" square? At least in French a brouhaha is a surrounding noise. Those squares are more like a fog, brouillard in French. Brouhaha/brouillard, is there a linguistic confusion there? 


Who is Behind the Chess Variant Pages?. The editors, past editors, contributors, and inventors behind this site.[All Comments] [Add Comment or Rating]
David Cannon wrote on Mon, Jun 29, 2020 06:35 AM UTC:Excellent ★★★★★

Welcome to our two new editors. It's great to see some new blood. 

Next step : see some new blood in terms of contributors, not just editors, too. I'll try to find time to design a new variant or two myself, if I can get some letup from my 70-hours a week job, but I'd also love to see a lot more game designers get on board.


Chess+. Players choose when and where to place their pieces behind the pawns.[All Comments] [Add Comment or Rating]
David Cannon wrote on Wed, May 27, 2020 05:52 AM UTC:Excellent ★★★★★

Great idea. I have always loved Fischerrandom Chess, but I really don't like the way it gives players no control over where their pieces start. I also consider Fischer's castling rule to be cludgy and it's hard to believe that a man of his genius came up with that. Your project fixes those shortcomings. 

One tweak I'd make if it were up to me is to require both players to enter ALL their pieces before making any other moves. White would enter a piece, followed by black, and they'd take it in turns to enter pieces, one at a time, until the first and eighth ranks were full. Of course, Bishops must be required to be on different coloured squares. 


Zanzibar-XL. Further step after Metamachy. 80 pieces of 19 different pieces, with historical lineage.[All Comments] [Add Comment or Rating]
💡📝Jean-Louis Cazaux wrote on Mon, May 11, 2020 11:22 AM UTC:Excellent ★★★★★

Thank you very much. I have been able to upload all diagrams and the process was very lean. 

Yesterday, it was my mistake for the size limit. Instead of uploading the jpg diagrams I have made for my own website, I uploaded instead the source images coming from the board painting tool, which are much heavier. Thank you for your help.


Antelope. Makes (3,4)-jump.[All Comments] [Add Comment or Rating]
Jean-Louis Cazaux wrote on Mon, May 11, 2020 06:01 AM UTC:Poor ★

The texts still says: The antelope is a (3,4)-jumper, i.e., it moves (with or without taking) four squares horizontally and five vertically, or five squares horizontally and four vertically.

It should be corrected as:

The antelope is a (3,4)-jumper, i.e., it moves (with or without taking) four squares horizontally and three vertically, or three squares horizontally and four vertically.

Btw, what is the name of the (2,4) jumper?


Zanzibar-XL. Further step after Metamachy. 80 pieces of 19 different pieces, with historical lineage.[All Comments] [Add Comment or Rating]
H. G. Muller wrote on Sat, Apr 25, 2020 11:19 AM UTC:Good ★★★★

Pieces are never attacking friendly pieces or I miss something

That is the answer to my question. So if a virgin King is on h1, a black Bishop on h2, and a black Knight on g4, the King can move to h3. If his own Bishop was on h2 instead, he could not.

Some people would say pieces can attack the square a friendly piece is on. They obviously cannot capture it, but that doesn't necessarily mean the same thing as being attacked. E.g. when my King stands next to an enemy Pawn that is protected, does he attack that Pawn?

Personally this rule strikes me as quite illogical; to pass through a square it should be empty, and if you don't pass through it but jump over it, you shouldn't have to worry if you are attacked there. And I wonder how much this rule actually affects the game; it seems very hard to attack any squares next to the enemy King before he moves away to safety, as he starts buried behind 2 or 3 ranks of pieces. Especially if he can jump.

In general I like your variants a lot, because you do not only feature super-strong pieces (much stronger that Rook), but also Knight-class pieces. Most variants suffer from an over-abudance of Queen-class pieces. The middle of the strength spectrum is still a bit under-populated, though: almost none of the pieces is close to a Rook in value.


Shako. Cannons and elephants are added in variant on 10 by 10 board.[All Comments] [Add Comment or Rating]
💡Jean-Louis Cazaux wrote on Sat, Apr 25, 2020 10:55 AM UTC:Excellent ★★★★★

Looks great


Bishops Chess. Chess with two light-squared and two dark-squared Bishops on each side.[All Comments] [Add Comment or Rating]
Greg Strong wrote on Thu, Apr 23, 2020 09:58 PM UTC:Average ★★★

I think this game is OK, but I do not care for the promotion rules.  The game does not have a queen, so promotion to queen would already be the strongest piece.  The amazon seems excessive and most games that feature that piece are not very good IMO.  The amazon attacks in 16 directions while the next strongest piece - the rook - only attacks four.


Metamachy. Large game with a variety of regular fairy pieces.[All Comments] [Add Comment or Rating]
💡📝Jean-Louis Cazaux wrote on Wed, Apr 15, 2020 09:34 AM UTC:Good ★★★★

Thanks a lot. I didn't know about Lioness, very good.


Sho Shogi. Historic predecessor of shogi. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]
Jean-Louis Cazaux wrote on Mon, Apr 13, 2020 09:36 AM UTC:Excellent ★★★★★

Very good information! What is not clear for me at the moment if that Asakura shogi is a reconstruction of a possible step in the evolution of shogi, or if that form of game is really asserted and supported by historical proofs. I may ask a specialist that   I know. Thank you again.


Bent Riders. A discussion of pieces, like the Gryphon, that take a step then move as riders.[All Comments] [Add Comment or Rating]
Jean-Louis Cazaux wrote on Sat, Apr 11, 2020 06:59 AM UTC:Poor ★

I came on this page and I am horrified to read what I read.

"In H.J.R. Murray's History of Chess, page 181 states that the Alfonso manuscript was published in about the year 1211" >> no, not 1211! Murray wrote it right: 1283. 

"which on page 346 is said to have used algebraic notation, and to have described a chess variant that included the modern B and Q": not at all!
That chess variant wich used algerbric notation and modern move is another one, from India, written in Persian and dated 1796-8. It is reported quite clear in Murray page 181 for who has eyes to read!

Page 348, Murray gave a short description of Grant Acedrex from King Alfonso X.Today this is better known thanks to the PhD work of Sonja Musser. I worked a bit with her on this, this is reported in my book A World of Chess (McFarland, 2017). In few words: what was called Unicornio in medieval spanish was clearly a Rhinoceros. So the Rhino was a piece first jumping like a Knight, then going away like a Bishop.


It was the counterpart of another piece moving one step diagonal then moving away on rows and columns. That later piece is called Aanca in the manuscript. It's an Arabic word, not Spanish, designating a giant Eagle or prey bird, from oriental legends (able to carry elephants). This was mistakenly traduced by Gryphon by Murray. This is unfortunate as the Gryphon was a very different legendary animal. This is why I prefer to use the name of Eagle in Metamachy and not Gryphon to avoid replicating that mistake.
 

"Not described there is a piece which makes a one step Rook move and then continues outwards as a Bishop. For lack of a name, I'll call it the Aanca.
No no no please! Aanca is the Giant Eagle, or the Gryphon if you want. Do not give that name of Aanca to a piece which is different and is more like the Unicornio / Rhinoceros. This is a very very bad idea. Stop adding confusion, I wish one is more careful when reading the work of Murray.

 


Spartan Chess. A game with unequal armies. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
David Cannon wrote on Wed, Apr 8, 2020 02:10 PM UTC:Excellent ★★★★★

I don't usually like games with different armies, but this is an exception. You've put a lot of thought into making a game whose different armies are not unevenly matched. For sure, the Spartan side lacks a Queen and its army appears to be slightly less powerful, but that is compensated for by the presence of two kings, both of which must be checkmated/captured. 


Sac Chess. Game with 60 pieces. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
🕸Fergus Duniho wrote on Sun, Apr 5, 2020 01:35 AM UTC:Excellent ★★★★★

I can't believe this game hasn't been reviewed yet. This is the best game I've played that includes an Amazon. I normally leave the Amazon out of my games, because it has the power to force checkmate by itself, and that has the potential to wreak a game. However, that hasn't been a problem with this game. This game includes several other weaker compound pieces that help make it unsafe to move the Amazons out too early. To get to the point where you could use an Amazon to force checkmate against a King, you have to do lots of maneuvering of other pieces. Furthermore, the potential of the Amazon getting a bead on the King means that position is sometimes more important than material advantage. You can't count on winning just because you are ahead materially. If you find that you can't stop your opponent's Amazon, you may lose even if you're materially ahead. This makes the game more dynamic and exciting.


Recognized Chess Variants. Index page listing the variants we feel are most significant. (Recognized!)[All Comments] [Add Comment or Rating]
Zied Haddad wrote on Tue, Mar 31, 2020 11:18 PM UTC:Good ★★★★

Hi, thank you for your comment.

Raphael mentioned his comment to me. Loving / Preferences are individual choices.

I have a clear conflict of interest here. 

Is the fact that the recognised variants section wasn't updated from 2006 means that the administrators of chessvariants haven't found any new / recent variant worth to be added ?

Just to mention that recently, there was many things new concerning Musketeer Chess: Jocly website went down so your website, mine and HG Muller work are the only websites where it's possible to play this variant.

Many engine programmers become to have growing interest in it. The major one is for sure Stockfish that recently released Musketeer Stockfish. There are a total of 6 Programmers that already made engines for Musketeer Chess, which is not an easy variant to program due to the rules that concern the Piece selection and the "Gating Selection" = squares where the pieces will enter the game.

This growing interest is for sure for me a good thing. The majority of these programmers tried to play the game and loved it. 

Have you an idea if there are other variants that are currently commercial ?

I runned tens of thousands of engine games and played myself hundreds. 

My conclusions based on these tests are as follows: The game seems to be balanced as there are almost equal winning chances comparing black and white chances, and the draw percentage is low (less than 8%). Seirawan Chess that Inspired Musketeer Chess favors clearly White for example.

 

Thanks again for your comment: PS working on a wiki page and i mentioned your Game Courier in it. A really nice tool.

I hope also that Lichess will add it to their server.


Raphael Elie Kakou wrote on Mon, Mar 30, 2020 06:08 PM UTC:Good ★★★★

Hi

My interest for chess variants is growing since i retired from the army two years ago. This website is outstanding and inspiring. I met with some funs of chess variants. A special mention to a certain Medical Doctor working in Paris who's name is Dr Zied Haddad and who's a nice and smart man. He invented Musketeer Chess and i got the chance to play with him a few games and he shared with me his great passion for chess and chess variants and why he got motivation to invent and spend much time and more in inventing chess variants and designing and creating new pieces.

I must say that Musketeer Chess is for me among the best variants (with Seirawan chess and a new variant named Shogun). This post is about recognized chess variants. I wonder why Musketeer Chess isn't among these variants.

 

Currently it's almost the only commercial chess variant i know. It offers many different fairy pieces that help play on the board (I prefer playing on the board even though with the current pandemics the only person I can play chess or chess variants with is myself). These pieces are also very interesting esthetically and I regularly use them to customise the classic chess set. My grandson loves for example when I replace the Rook with the Spider or the Fortress (the Rook is supposed to be more valuable in terms of relative strength than the Knight or Bishop, but it is usually much smaller in size than these pieces). I also love to use the Unicorns (either replacing the knights using unicorns, or just customising my pieces). When using unicorns instead of the Knights the games are very tactical and very short.

 

How it's possible to add musketeer chess to the list of recognised chess variants? 

I also wanted to praise the website of the inventor, nice looking, easy to use and with many free tools like the Board Painter tool allowing to build Diagrams for many chess variants.


Wizard's War. Game with piece-creating Wizards and a board divided into arena and enchanted sections. (10x10, Cells: 84) [All Comments] [Add Comment or Rating]
Anthony Viens wrote on Thu, Mar 26, 2020 02:29 AM UTC:Good ★★★★

Well hey, apparently I never commented on this!

I quite like it! The interplay between needing pieces on the arena/safer on the enchanted squares is quite unusual.

Creating your own army is fun, and ensures no game start will be quite the same.

This is a very cohesive & well thought out variant.


Elevator. Three-dimensional chess variant with moving elevators and walking, vaulting and flying pieces. (4x(8x8), Cells: 192) [All Comments] [Add Comment or Rating]
Anthony Viens wrote on Wed, Mar 11, 2020 03:14 PM UTC:Good ★★★★

Very good, well-thought out game, with pieces which compliment the board--some require elevator movement, some use the empty shafts, and the ox can use them to capture. Nicely done.

I will say the rules allowing the flying pieces to go 'up, through an elevator trapdoor' feel very unintuitive; especially if playing with a physical set. It makes more sense to me to allow flying pieces to go either up or down through the empty shafts only; this would also make it impossible to threaten an identical piece without also being in danger.

Still, a very good variant!


Xhess. Decimal variant with Nightriders and Cannons. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
Anthony Viens wrote on Thu, Mar 5, 2020 01:03 AM UTC:Average ★★★

This looks like a decent 10x10 variant; it has the basic Chess pieces--with more mobile Pawns-- and well-known Knightriders & XiangQi Cannons.

The King game-winning 'promotion' rule could liven up the endgames without totally changing the game.

However, I am confused as to the logic behind the apparently abitrary initial setup. The Rooks have an open rank (like Grand Chess) which is fine.  But the Horsemen (modified Pawns) are more mobile--but start very close to each other.  So close, in fact, they can't use their forward most moves initially without being captured.   Except the Horsemen on the far ends; they start one rank farther back for no discernable reason. 

The forward pawn lines leave a bunch of space to the rear; considering the vast area there aren't very many other pieces.

Also, the Knights are back a rank from the Horsemen, consequently they cannot move forward as the first move. They are protecting Horsemen, but it seems like there ought to be another way to do this.

Xhess is quite playable, but I'm left with the impression the starting setup could use an overhaul.


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