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Comments by SamTrenholme

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ChessVA computer program
. Program for playing numerous Chess variants against your PC.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Oct 15, 2007 11:16 PM UTC:Excellent ★★★★★
Just letting people know I have no problem extracting the .zip file in the unzip included with Busybox. Busybox is a project to make versions of various *NIX programs as small as possible. I assure you, the unzip included with Busybox is, in no way, going to have any fancy features.

I get the feeling that XP's or Vista's unzipper is fussy in a way that Winzip accidently breaks. As an aside, I have never had problems unzipping files in Windows XP that were generated with the *NIX zipping utilities, even after using a special program called 'advancedcomp' to make the .zip file about 5% smaller than an ordinary .zip file.

I will post a report about ChessV 0.9.3 tomorrow.

I would like to thank Greg for the update, and for this excellent, free program.

- Sam


Sam Trenholme wrote on Tue, Oct 16, 2007 04:18 PM UTC:
OK, I didn't get a chance to give this game a full lookover last night (I spent yesterday afternoon struggling to get sound to work with Windows XP in my laptop for my job; I finally got sound going this morning).

Looking at the program very quickly, it looks like not too many new variants have been added to the game. What has been added, under the hood, is support for a lot more piece types, especially in the 8x10 and 8x12 boards.

For example, it is now possible to make a preset that plays the 'Crowned' pieces variant I proposed a couple of months ago. It is also possible to play with the 'Sage' (Camel + Bishop) and 'Tower' (Camel + Knight) pieces on the 8x10 and 8x12 board (As per the discussion in this thread). One thing ChessV doesn't have yet is these 'new' pieces on a 10x10 board (I feel the Sage makes more sense on a 10x10 board than on a 8x10 or 8x12 board, because otherwise there are problems with first-move smothered mate threats; perhaps a game with 'Sages' and possibly 'Towers' will make sense if we leave an empty square besides the king; I can see an 8x12 setup with the usual FIDE pieces, two sages, another faerie piece, and an empty square besides the king to stop smothered mate threats). However, to make these variants requires reading the extensibility document included with ChessV and making your own preset.

I plan on making ChessV presets for some of the ideas discussed in those threads, which I may be able to release next week (The only way I'm able to take time to post this is because I'm killing time while Cygwin downloads).

Anyway, Greg, this is really great work and I'm glad to see a new version of ChessV!

- Sam


Sam Trenholme wrote on Thu, Oct 18, 2007 05:35 PM UTC:
Just letting people know that I have uploaded a few games that take advantage of some of the new pieces ChessV supports. These are games which I haven't officially published, but that have been discussed on the message board here. It can be downloaded by clicking here. I also have a mirror of ChessV 0.9.3 available.

- Sam


Fairy-MaxA computer program
. Free open source chess variant software.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Dec 31, 2007 10:49 AM UTC:BelowAverage ★★
This is a developers-only snapshot of a program that may become a usable chess variant engine. However, there are a number of issues that need to be worked out:
  • There is no documentation on how to actually use fairy max. The only way to figure out how to use the program is to read the C source.
  • The C source code does not contain any license text. I would like to know under what license the program is released, and whether the terms are OSI-approved Open Source compatible (GPL, etc.)
  • The program itself has no built-in help
  • There is also WinBoardF, which has support for a few chess variants. However, there is no documentation about how to interface WinboardF with fairy max.
Unlike SMIRF and ChessV, there is no convenient way to use this program to actually play any chess variants (In both of those cases, it was simply a matter of selecting a variant, telling it to play white or black, and start playing). I can see most of the pieces are in place; once there is documentation about hooking up Fmax (or Joker) to WinboardF, this will probably be a playable and enjoyable variant engine.

- Sam

P.S.: I will change my rating once documentation is available to actually interface fairy max with WinboardF. I will change my rating to one even higher if a well integrated fairy max + WinboardF package is made, which doesn't require any messing around with .ini files to play fairy chess against the computer.


[Subject Thread] [Add Response]
Sam Trenholme wrote on Wed, Jan 23, 2008 05:27 PM UTC:
I think the problem with Chess as a social game is that there isn't enough luck in the game. It's a game where, when two people sit down to play, you pretty much know who is going to win the game.

A good social game is one with easy rules that people can learn quickly; I'm thinking the card game 'spoons': One less spoon in the center than the number of players; each person has four cards, gets one card from the left, passes one card to the right. When someone has 4-of-a-kind, they grab for a spoon; then everyone else grabs a spoon, irregardless of whether they have a 4-of-a-kind. The last person won't have a spoon, and is eliminated and the next round begins.

Chess is not a social game; women in particular are very uncomfortable playing Chess because of its competitive aspects. It's a game where men are in a contest to see who the better man is. Since, these days, a computer can give the world champion a hell of a game, I don't see the point of seeing how well I can do something a computer can do much better.

I can see why chess clubs are dying out and going to the Internet; people generally don't play chess to make new friends, and the game is no fun when two players have different skill levels.

- Sam


Capablanca Random Chess. Randomized setup for Capablanca chess. (10x8, Cells: 80) [All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Fri, Jan 25, 2008 04:48 PM UTC:
For my own Schoolbook chess, which supports free castling, I just notate a castling move as the square the king moves to; for example, Kc1. Where the rook moves to is determined by where the king moves to, and the only time the king can move more than one square is when he castles, so this notation is unambiguous.

- Sam


ChessVA computer program
. Program for playing numerous Chess variants against your PC.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Tue, Jan 29, 2008 08:52 PM UTC:
What happened to the ChessV site? It looks to be down.

- Sam


Grand Chess. Christian Freeling's popular large chess variant on 10 by 10 board. Rules and links. (10x10, Cells: 100) (Recognized!)[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Feb 4, 2008 08:54 PM UTC:
That link gives me a 404. Please provide a correct, updated link.

- Sam


Castling in Chess 960. New castling rules for Fischer Random Chess. (8x8, Cells: 64) [All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Feb 4, 2008 08:56 PM UTC:
There is a version with better castling called 'Chess 480'.

Kasparov's Premiere at Shogi. Chess world champion plays a game of Shogi.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Wed, Feb 20, 2008 06:29 PM UTC:
I have the feeling Kasparov could, if he wanted to, be a very formidable Shogi player.

- Sam


Gary Gygax deathA news item
. Announcement of Gary Gygax's death.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Tue, Mar 4, 2008 10:32 PM UTC:
Just to let people know, the late Gygax did contribute a couple of comments here on chessvariants.org over the years. A very friendly person; I am deeply saddened by his passing.

Seirawan ChessA game information page
. invented by GM Yasser Seirawan, a conservative drop chess (zrf available).[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Wed, Mar 26, 2008 05:30 PM UTC:
You can buy Seirawan Plastic pieces for reasonable prices here.

Sam Trenholme wrote on Wed, Mar 26, 2008 08:38 PM UTC:
I don't think the Seirawan guys are going to patent Seirawan chess; it is impossible to stop anyone with their pieces from playing another game with them, such as the closely related Energizer Chess, or any of the 8x10 or 10x10 variants using two Seirawan chess sets and a custom board.

I only have your word about the unpleasant correspondence you allegedly had with someone involved with Seirawan chess; unless they threatened a lawsuit or what not, I would just brush it off as them having a bad hair day.


10x8 Variants. Missing description[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Wed, May 28, 2008 11:21 PM UTC:
I have a list of various opening setups for Carrera/Bird/Capablanca chess here. Right now, I think Seirawan chess has the right idea; the problem with 10x8 chess is that the value of the pieces relative to each other completely change because of the new board. With Seirawan chess, we just need to worry about the values of the Hawk (Bishop + Knight) and Elephant (Rook + Knight); everything else can be inherited from FIDE chess.

[Subject Thread] [Add Response]
Sam Trenholme wrote on Wed, Jun 4, 2008 10:33 PM UTC:
Arimaa is an example of an abstract game computers can't play very well at all. It can even be played with an ordinary Chess set.

Sam Trenholme wrote on Thu, Jun 5, 2008 06:34 PM UTC:
Yes, I'm sure it is possible to make a computer program that can play Arimaa well; however to do so will require breakthroughs in AI that we've tried to do for decades without success.

Basically, the computer in front of you is a complex adding machine. It doesn't think nor recognize patterns the way a human does. Yes, we've made the adding machines complex enough that they can do things like play music and movies, and even play Chess well. But we haven't been able to have it so computers can, for example, translate from one language to another without the translation being so bad it's just about not readable.

Nor have we been able to get a computer to play a game with a high branching factor, like Go or Arimaa well. Computers play Chess very differently from humans; they just look at all of the possible moves, using 'alpha-beta' pruning to determine which moves are and are not looking at. They don't recognize patterns; they just see possible future moves and how much material they have.

A computer needs to evaluate millions of possible positions to play as well as a human who only looks at dozens of possible positions. Computers aren't able to really see a given position to evaluate how good it is; they only play as well as we do because they basically brute force through just about every possible chess move so many moves down.

Games like Go and Arimaa are good because brute force just doesn't work with these games. In order to have a computer play these games well, we will have to make a true AI breakthrough. Which will probably have consequences far beyond just having a computer playing some abstract game really well.


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Sam Trenholme wrote on Tue, Jun 10, 2008 11:15 PM UTC:
You know, looks like 8x10 Chess (Capablanca chess, etc.) is dead. The only 8x10 Chess games I see being played right now are a couple of 'modern capablanca random chess games'. What seems to be in vogue is various forms of 'Modern chess' and 'Seirawan Chess'. Seirawan Chess has all of the good things Capa chess has (bigger tactics) and few of the problems (Knights weaker than bishops, new board requiring all of the pieces to be reevaluated).

- Sam


Seirawan ChessA game information page
. invented by GM Yasser Seirawan, a conservative drop chess (zrf available).[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Tue, Jun 10, 2008 11:17 PM UTC:
I think the above link should be revised to be www.seirawanchess.com.

[Subject Thread] [Add Response]
Sam Trenholme wrote on Thu, Jun 12, 2008 05:21 PM UTC:
You know, George, you mention 10x10 as being a good board size. I would like to see a 10x10 variant of chess thrive. I think the most successful 10x10 variants are Grand Chess and Omega Chess. The nice thing about Omega Chess is that you can, right now, buy a professional tournament board and pieces for only $40 with shipping (at least in the US).

Maybe one way of handling the pawns on a 10x10 board is to make the pawns a little stronger. One idea that comes to mind is using Winther's scorpion pawn to make the lowly pawn more powerful. Another piece that is weaker on the 10x10 board is the knight; Strong, in Opulent Chess handled this problem by having the knight also being able to move like a rook, but only square (knight + wazir). I myself would make it so the knights could also jump exactly three squares diagonally (over other pieces, if needed), or have it so one knight can also jump three squares diagonally, and the other knight can jump three squares like a rook.

A lot of 10x10 variants were proposed in the 10 contest.


Piece Values[Subject Thread] [Add Response]
Sam Trenholme wrote on Wed, Jun 18, 2008 04:37 PM UTC:
I have been playing around with Joker80 and the corresponding Winboard program; I am very pleased with Joker80's performance. In my initial testing, the only program I could get to beat Joker80 was Smirf, and I needed to give Smirf over a minute to make a move while making Joker80 make all of its moves in under 5 minutes.

Joker80 soundly defeated ChessV 0.9.3 and Zillions of Games, even with a time handicap in both cases.

Anyway, some issues:

  • I can't set up a custom opening setup in Winboard, save the opening setup, and have Winboard read the setup without complaining the file is unreadable
  • It would be nice if Joker80 had support for the 'free' castling used by Grotesque and Univers Chess (not to mention my own humble contribution to 10x8 chess, Schoolbook)

Schoolbook. 8x10 chess with the rook + knight and bishop + knight pieces added. (10x8, Cells: 80) [All Comments] [Add Comment or Rating]
💡📝Sam Trenholme wrote on Fri, Jun 27, 2008 11:04 PM UTC:
To clarify, I have recently declared Schoolbook dead and will no longer work on problems for this variant. I went to a lot of work to develop mating problems and even a bit of opening theory. No one was interested. Such is life.

💡📝Sam Trenholme wrote on Mon, Jun 30, 2008 04:42 PM UTC:
To clarify Schoolbook's castling, five different types of castling are possible:
  • White's king moves to b1; White's queenside rook moves to c1. Black's king moves to b8; Black's queenside rook moves to c8.
  • White's king moves to c1; White's queenside rook moves to d1. Black's king moves to c8; Black's queenside rook moves to d8.
  • White's king moves to d1; White's queenside rook moves to e1. Black's king moves to d8; Black's queenside rook moves to e8.
  • White's king moves to h1; White's kingside rook moves to g1. Black's king moves to h8; Black's kingside rook moves to g8.
  • White's king moves to I1; White's kingside rook moves to h1. Black's king moves to I8; Black's kingside rook moves to h8.
This is the same castling used in Univers chess; a mirror reversed form of the same castling is used in Grotesque Chess and Landorean Chess.

While putting links here, here are some other 8x10 starting arrays: Aberg's variation and Paulovich's variation, and, of course, this exhaustive list.

- Sam


💡📝Sam Trenholme wrote on Mon, Jun 30, 2008 04:58 PM UTC:
Mr. Muller wrote:

Since there is also a table of piece values on this page, I should point out that playtesting with almost any program shows that the Archbishop values given here are way too low: A+P typically beat Q, and A+A+P beats C+C, in any game phase. See the discussion on the page of th Aberg variant.

My reply: I looked at the discussion and just saw a flame war. Do you have a table of your proposed values for pieces in 8x10 chess? And, yes, implementing Schoolbook's castling in Joker80 would be nice, in addition to supporting more of the proposed 8x10 opening setups.

- Sam


💡📝Sam Trenholme wrote on Mon, Jun 30, 2008 06:08 PM UTC:
Thanks for the updated figures. I trust your figures; coming from a family of scientists, I feel looking at empirical evidence and performing experiments is the most reliable way to get accurate information. (I'll spare the board my rant about young earth creationists and global warming deniers)

I note you make pawns less valuable than they are in 8x8 FIDE chess; I think a big reason is because, with three powerful pieces on the board, the game is more tactical and less strategic.

- Sam


Reverse Symmetry. Missing description[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Jun 30, 2008 06:38 PM UTC:
I always felt the simplest chess variant, which basically doesn't affect the game except for throwing out the opening book, is one where we swap white's queen and king (but don't move black's queen and king) and make the corresponding change in castling rules.

This one one of the possible Displacement chess opening setups.


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