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Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Wed, Jan 20, 2016 02:07 AM UTC:
Hi H.G.

Is there a (preferably simple) way for your 'Interactive Diagrams' to generate diagrams for unusual board shapes such as hexagonal, circular or custom boards?

Full house hexagonal chess. Game with 50 pieces. (11x11, Cells: 91) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Wed, Jan 20, 2016 07:22 AM UTC:
I changed my game setup diagram and piece names very slightly, in switching just the positions of the Hippo and Hydra in each camp. I also made the Hydra the most powerful piece in the game, rather than the Hippo (at least in my estimation), by switching their movement capabilities too. I decided to do so particularly because I had found an even more fearsome piece image for the Hydra, by using a larger Alfairie piece set (in the Diagram Designer) rather than staying with what I originally had used. Otherwise, the game remains the same.

Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Wed, Jan 20, 2016 08:13 AM UTC:
Thanks H.G. for your reply. "Custom board" diagrams are described this way in Game Courier documentation, so it seems your answer of 'no' is right on, as I had very oddly shaped boards as one possible thought, for one thing.

For now, I had been a bit curious about circular boards, and wished to test making a diagram for one from scratch, by simple means if possible. If I wish to, I think I can cut and paste the http address for an existing setup diagram, such as I've seen on a number of webpages on this website. I'd be confined to using the setup that it depicts, unless I combined it with other (preferably circular!?) setup[s], to create a 3D (or even 4D?!) variant of my own, for example.

Even using just one circular board setup diagram, however, I might invent my own rules for the piece movements to be used for any possible variant of mine, to be played on that circular board. Recall (naturally) that many variants have been created using just the setup for standard chess.

In regard to diagrams for "custom boards" again, I also was thinking of, say, even 8x8 boards with graphics on individual squares (or some of them). I think I've seen at least one such board used for a variant included on this website. A whimsical thought that came to me the other day would be to somehow combine Chess and Snakes & Ladders, though it would be a very involved and lengthy project to complete, I suspect.

4*Chess (four dimensional chess). Four dimensional chess using sixteen 4x4 boards & 96 pieces. (4x(4x(4x4)), Cells: 256) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Thu, Jan 21, 2016 12:34 AM UTC:
I've now removed all remaining unwanted primitive (ASCII) diagrams from my 4*Chess submission, replacing them with Diagram Designer generated diagrams that still show possible legal moves on an empty 4D board by all the various piece types.

Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Thu, Jan 21, 2016 04:53 AM UTC:
Comment deleted

Kevin Pacey wrote on Fri, Jan 22, 2016 11:31 PM UTC:
Comment deleted

Sac Chess. Game with 60 pieces. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sat, Jan 23, 2016 04:01 AM UTC:
In my submission I gave links from my Chess Federation of Canada website blog, including my entry there that covered Sac Chess in detail. Included in that entry was my proposal for two slight spinoff variants of Sac Chess to accomodate anyone who dislikes Amazons being clearly more powerful than a Queen. One spinoff variant ("Cash Chess") had two different piece compound pieces replacing each of the 2 Amazons in both camps. These were to be B+N+K ("Freemason") and R+N+K ("Ship") compounds, each a compound piece of my own invention (afaik). 

I wasn't keen on this spinoff variant myself, since there would be less near-symmetry in each camp, and there would be more piece types to remember in total. The other spinoff variant ("Royal Sac Chess") would let Queens have a small distinction over Amazons on at least some occasions. In this spinoff variant, in the event of stalemate or a three-fold repetition of moves (perpetual check being a case of such), if one side had more queens on the board than his opponent then he would win the game, else it would be a draw in the event of an equal number of queens.

I kind of liked this spinoff variant, as perhaps an important way to justify having Queens on the board alongside Amazons (which are clearly superior in their relative value AND movement capabilities on an empty board). On the other hand, it's using a rather artificial rule change that would drastically affect some games' final results. 

In the end, I decided that the reasons you gave for liking having a Queen, besides Amazons, were adequate enough, such as keeping a quaint royal tradition going in spite of my wanting to include many compound pieces in Sac Chess, including Amazons. The Amazon seems to get a bad rap because it is so powerful (it can mate a King on an empty board with no assistance, for instance). At least having a Queen on the board as a possible threat to trade itself for an Amazon gives a player with an Amazon one more thing to watch out for.

Dai Dai Shogi. (Updated!) Historical large Shogi variant. (17x17, Cells: 289) [All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Sun, Jan 24, 2016 01:09 AM UTC:
Hi H.G.

Do you know if this Shogi variant was ever played that much? I am curious since I've invented a number of 4D chess variants with many pieces per side, the largest of them being a 5x5x5x5 variant (5*4DChess) with 140 pieces (i.e. 70 per side). That is less than this Shogi variant has, and it has fewer piece types (14) than it, though my 5x5x5x5 variant has more board cells (625) than this old Shogi variant. It could increase my faint hopes that my largest 4D variant might be played even a little (if at all) at some point if this Shogi variant was ever remotely popular.

5*4DChess (four dimensional chess). Four dimensional chess variant played with 140 pieces. (5x(5x(5x5)), Cells: 625) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sun, Jan 24, 2016 01:53 AM UTC:
I've increased the scale of the setup diagram slightly to make viewing it somewhat easier (e.g. to see the board co-ordinates), without the diagram being longer than I can fully see on my laptop, that is without using the sidebar. Note that I've now used a proper 4D alternating checkering pattern for the 25 5x5 2D mini-boards. I could not manage to do so, in using the Diagram Designer, without increasing (i.e. doubling) the thickness of the spacing for the inner mini-board border margins, a consequence of there being an odd number of squares for the mini-board ranks or files, unlike for my earlier 4D chess variants, which used 16 4x4 2D mini-boards.

Dai Dai Shogi. (Updated!) Historical large Shogi variant. (17x17, Cells: 289) [All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Mon, Jan 25, 2016 01:00 AM UTC:
H.G. wrote:
"...Note that size is not the exclusive determining factor. The large Shogi variants are all designed to have a few 'boss pieces' in them, which are capable of massacring weaker pieces at high rate. Even when the latter flock together in dense crowd where they mutually protect each other. Because pieces like Lions and their ilk have rifle-capture modes that thwart protection. And often there are rules that prevent them from being traded out of the game. Without such features the games would quickly degenerate into a tedious and boringly slow shuffling of all the weak pieces, with large probability for a stand-off. Tenjiku Shogi (2x78 pieces) did enjoy quite some popularity amongst western players a decade or so ago. But this is unique amongst the historic Shogi variants for having ultra-powerful Fire Demons (2 per side) which can capture up to 8 pieces in one turn, and greatly shorten the duration of the game (even compared to the much smaller Chu Shogi, where a typical game lasts 200-300 moves)."

Thanks for your reply H.G. I've played standard Shogi many times, and I've tried Chu Shogi once (though my opponent and I had to abandon the game in the opening phase due to time constraints, as we were not using a clock, plus we were unsure of some rules, or at least my opponent was unsure how to react to my moving my Lion many turns in a row, I seem to vaguely recall).

[deleted some paragraphs]
...

Fwiw, I once was at the Ottawa home of a player of games such as Go and Shogi, and watched a documentary from Japan, where for an exhibition a huge board was made for a unique one-time Shogi variant between two players, with a few thousand pieces per side used. The game lasted something like 4 days, and the players naturally took breaks, including a whirlpool break together (more than the viewer needed to see or know, IMHO).

Games on Game Courier. A listing of Chess variants for Game Courier, ranked by number of times played.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Mon, Jan 25, 2016 05:05 AM UTC:
I have 2 questions for Fergus:

1) At the moment the "number" of games for the variant "Sac Chess" [i.e. games counted as finished!?] shows as 3, when I believe there have only been 2 finished at this point (and 2 more are currently being played, one of which was by a personal invitation). Is there something I'm missing?


2) Not quite sure this is the right thread to ask under, but in the event that a game is found wanting for any reason, can it be deleted from Game Courier (& by who)? 

A trivial example of why this might be desirable is an old chess variant (using standard chess' setup & piece movement rules) that I once read about in a book. The variant was called something like "Check!", the object of which was to deliver the first (and only) check of the game, winning immediately. It turns out that White wins by force in something like 5 moves if he plays 1.Nc3. Such a variant, if it existed on Game Courier, would be a prime candidate to be deleted, I would think.

Kevin Pacey wrote on Mon, Jan 25, 2016 05:07 PM UTC:
Thanks Fergus. Though I didn't call it that, I was indeed asking about removing the settings file for a game, with my second question.

Sac Chess. Game with 60 pieces. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Tue, Jan 26, 2016 01:18 AM UTC:
Fwiw, here's a link to Alekhine Chess, which uses 1 Amazon and 2 Queens: http://www.chessvariants.com/index/external.php?itemid=zAlekhineChess Also fwiw, I seem to recall somewhere one person commented that that game could be better with 2 Amazons and 1 Queen, so as to lessen the chance that all the Amazons might be traded off... you can't please everybody. I wanted to keep Sac Chess fairly close to standard chess in spirit, in a way I hope that's understandable, when adding all the compound pieces to fill in the spaces in each side's camp, on a 10x10 board. Including Amazons in a variant always seems to create some sort of a backlash eventually, but I couldn't resist doing so since they seemed a natural extension of the compounds that I used (which are all the crowned or knighted standard chess pieces).

💡📝Kevin Pacey wrote on Tue, Jan 26, 2016 02:31 AM UTC:

I originally had in mind that the person I seem to recall who disagreed with the game produced by the inventor of Alekhine Chess (as far as the number of its Amazons to be included) was an example of a person not pleased with a particular game (other than mine, which is somewhat similar to Alekhine Chess). Clearly not everyone can always be satisfied with any particular variant, and someone may want it altered even in an unspecified way. In Sac Chess, if one has a position on the board with all piece types included, such as in the Setup position, the Amazon is the only piece that can always (unless pinned to the King) take any sort of piece type that is threatening it (I think this is a major point that you're indicating). The game is also a bit heavy on pieces that can move at the least like both a king and a rook (or bishop), e.g. both Sailors, both Amazons, and the Queen (for each side) can move like a king or rook, at a minimum. It's a drawback (of the theme of compound pieces that I used), possibly.

Whether or not it would be better to alter the game is an open question, but at this stage it's already being played on Game Courier, and I think I like the way it's turned out so far. Perhaps I (or someone else) can make a variant based on Sac Chess at a later date that may prove popular. At the moment it's the only variant I've invented (out of 10, so far) that someone (namely Carlos) kindly decided to write a Game Courier program for.

[edit 28 March 2018: I'd note, too, that, e.g., in the historic variant Courier Chess, the queen used there is a ferz-like piece, clearly inferior in powers to the guard-like piece type that is also used in that game, so it seems that Sac Chess is in such a way at least not without one or more precedent(s), in variant(s) that proved at the least somewhat popular in the past, if only regionally perhaps.]


Interactive diagrams. (Updated!) Diagrams that interactively show piece moves.[All Comments] [Add Comment or Rating]
Kevin Pacey wrote on Tue, Jan 26, 2016 04:07 PM UTC:
Comment deleted

Kevin Pacey wrote on Tue, Jan 26, 2016 04:37 PM UTC:
Comment deleted

Kevin Pacey wrote on Tue, Jan 26, 2016 04:56 PM UTC:
My apologies H.G.

Diagram testing thread[Subject Thread] [Add Response]
Kevin Pacey wrote on Tue, Jan 26, 2016 10:00 PM UTC:

I put the following in a wrong thread, so I'll delete it from there, after cutting and pasting it here for anyone who might be interested:

Posted by Kevin Pacey: After an idea occurred to me today, I'm testing out what a possible 3D circular chess variant diagram might look like. It's a 3D "diagram" that's a hybrid sequence of Circular Chess diagrams, albeit of somewhat varying sizes, based on such Circular Chess diagrams that are currently available to me on chessvariants.com. Perhaps an editor may wish to tell me if this 3D "diagram" might be acceptable in any possible future submission (presumably the 3 individual Circular Chess diagrams would line up vertically if in a submission).

Because the (empty) middle circular board has file labels, the location of the pieces & pawns on the other boards could perhaps more easily be referred to by file, too, by naming (with plain text) each piece's coordinates in the Setup section of such a submission. The idea of any variant based on the 3D "diagram" could well be to win by checkmating one of the other player's two kings. I'm still thinking about whether such a variant might even be feasible, but first here's the test, to see if it's even possible to submit such a variant diagram as acceptable:

Board 1:

Board 2:

Board 3:


Kevin Pacey wrote on Tue, Jan 26, 2016 10:03 PM UTC:

I put the following in a wrong thread, so I'll delete it from there, after cutting and pasting it here for anyone interested:

Posted by Kevin Pacey: Here's a second such possible 3D Circular Chess "diagram". The idea would be to tell the viewer with plain text where the pieces and pawns are placed, in the Setup section of any possible submission:

Board 1:

Board 2:

Board 3:


Kevin Pacey wrote on Wed, Jan 27, 2016 04:36 PM UTC:
Thanks H.G.

I can try out your diagramming suggestion at some point, especially if I
come up with a feasible 3D variant to use it with.

Sac Chess. Game with 60 pieces. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sat, Jan 30, 2016 08:53 AM UTC:
I've added the following to the end of the Notes section for my Sac Chess submission (to try to, in the most natural way I can imagine to date, accommodate those who dislike there being a single queen and two amazons in the setup position for Sac Chess):

"Note: to accommodate those who dislike the queen being clearly inferior to amazons both in their power AND in their number in Sac Chess at the start of a game, I can suggest the following fairly natural idea for a modified variant ('Royal Bevy Chess'), i.e. it has a similar setup and the same rules as for Sac Chess. Namely, in the setup position for Sac Chess, switch 2 queens for the 2 amazons, and switch an amazon for the single queen. This idea of having two queens and one amazon in a setup position may have first been used in 'Alekhine Chess', which is somewhat similar to Sac Chess, perhaps; here's a link to it:"

http://www.chessvariants.com/index/external.php?itemid=zAlekhineChess

Full house hexagonal chess. Game with 50 pieces. (11x11, Cells: 91) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sat, Jan 30, 2016 09:15 PM UTC:
Fwiw, I'd thought of making the Hydra piece type even more powerful, by having it move like both a Pegasus and a Hippo, but in the end I preferred to have certain 'blind spots' (6 of them) in a Hydra's sphere of influence. Not only that, but then the Hydra remains as a thematic compound piece, of just two (IMO) 'basic' piece types, as far as its movements go, namely Pegasus and King.

Carrousel Chess. Game with 32 pieces. (16x4, Cells: 64) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sun, Jan 31, 2016 12:43 AM UTC:
I've put my tentative estimates for the relative piece values in the Notes section of my Carrousel Chess submission now.

Sac Chess. Game with 60 pieces. (10x10, Cells: 100) [All Comments] [Add Comment or Rating]
💡📝Kevin Pacey wrote on Sun, Jan 31, 2016 01:17 AM UTC:
Sorry H.G., I hadn't been in a hurry up till now, and didn't realize you were eager. I wanted to at least see how my 2 games with Carlos were going to develop before getting more adventurous by playing a computer. Looking at our game of Sac Chess, Carlos seems to be doing very well, which doesn't suggest my chances would be good against a program (against a good one, I half expected to score say 1/4, if it would be about 200 rating points higher than my standard chess rating). 

In the meantime, it is becoming more clear to me that looking for a computer-resistant chess variant is a futile exercise, especially now that 19x19 Go computer programs are demonstrably so much stronger than before. I had guessed that it might take up to 100 more years for Go programs to take over and eventually dominate that game, from people.

I also had wanted to try to see my Glinski's Hexagonal Chess game with Carlos to a conclusion, before trying out that link you gave. An irrational concern that I might somehow go wrong and mess up my laptop in some way, before that game had finished, had been with me. Anyway, I'll try to get playing that computer program at Sac Chess soon after my brother & his wife go home tomorrow.

💡📝Kevin Pacey wrote on Sun, Jan 31, 2016 05:55 AM UTC:
I thought that tonight I better try unzipping that link you provided, H.G., in case I needed my sister-in-law's help tomorrow. It was pretty much as simple to unzip as you described in an earlier post. The only thing was I couldn't seem to save it as anything but a temporary download, so I'll have to download it each time I use it, unless I can figure out how not to. My used laptop was a gift from a friend, which might somehow complicate things due to any possible security measures set for him.

The program was set for 1 minute per side, and I initially tried playing at that speed. I clearly blundered a pawn for nothing very early, but for some reason the engine passed it up. Some more blunders followed (by me) and I soon allowed a mate. The next three games I tried 5 minutes, then 10, then 15. At one point I noticed I had lost on time, but was allowed to keep playing anyway (I didn't bother to figure out how to change that yet, if I wish to). Each of these 3 games I lost as well. Maybe I'm not yet used to the images for all the piece types, but the odd blunder (or once a mouse slip) kept occurring. I came closest to doing well in the 15 minute game (I always tried not to 'lose on time').

After that I set the program to have two engines play a 15 minute game. Again they each exceeded the limit and were awarded a further 15 minutes each on the clock all the same. As a spectator I thought the engines played conservatively, if not anti-positionally (IMHO). At one point Black seemed to go ahead in material considerably after about 40 moves with one trade only. Then trades came thick and fast, and eventually Black won a pawn ending two clean pawns ahead. The game only took about 80 moves (until mate), which would be about right for standard chess.

Thanks again for the link, H.G.

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