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Comments by SamTrenholme

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Pegniar ChessA game information page
. Introducing the Pegniar, a very interesting bifurcating bounce-slider, on a Gustavian board (zrf available).[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Fri, Sep 29, 2006 03:34 PM UTC:
As an aside, I have used the Gustavian board to make a number of Capablanca variants. I would like to thank Mats for calling this excellent board to my attention.

- Sam

Update The Zillions file with these variants is available as a file in the Yahoo Chessvariants group.


Sam Trenholme wrote on Sun, Oct 1, 2006 02:22 AM UTC:
Here you go; this is what a Gustavian board looks like:

You can not enter the black squares; this is an 8x8 board with four corner squares added.

- Sam


ChessVA computer program
. Program for playing numerous Chess variants against your PC.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Sun, Oct 1, 2006 02:32 AM UTC:
On my old PIII 450, I had Zillions play Chess V with both sides getting 60 seconds a move. Both engines played Schoolbook chess. ChessV won:

1. Af3 Nd6 2. Ng3 f5 3. Nd3 Nhf7 4. h3 e6 5. BI3 h6 6. Ah5 Bh7 7. Ke1?

Zillions, for mysterious reasons, made a meaningless king move.

7. ... I6 8. Af3 MI7 9. Bxd8 Qxd8 10. Nc5 Ng5 11. Ae5 Nf7 12. Ad4 Ad6 13. Mj3 Qe7

ChessV now has Zillions on the run. With a better pawn structure and two more pieces developed, black has more than equalized and now controls the game.

14. Nd3

At this point, Black can force the win of a piece. The moves to do so are left as an exercise for the reader.

In the game played, White never recovered and Black (ChessV) eventually won.


Secutor ChessA game information page
. Introducing the Secutor piece, and new collision-capture, on a Gustavian board (zrf available).[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Oct 2, 2006 03:19 PM UTC:
Andy criticizing a chess variant?? Who would have guessed! He is, at least, predictable.

Personally, I'd rather see Andy spend his time figuring out how to do a queen vs. king and king mate on a Gustavian board than troll here on chessvariants.org, but that it just my opinion.

- Sam


Pegniar ChessA game information page
. Introducing the Pegniar, a very interesting bifurcating bounce-slider, on a Gustavian board (zrf available).[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Mon, Oct 2, 2006 03:43 PM UTC:
I noticed that Gustavian Schoolbook had a problem with white always winning; the flanking archibishop/marshall variants seem to do better. Probably the best setup for Capablanca Gustavian is either ARNBQKBNRM or MRNBQKBNRA. Or maybe even QRNBAKBNRM or MRNBAKBNRQ. I also used your method defining 1,-2 etc. moves as 'knight' moves in the revised version of Gustavian Capablanca.

- Sam


ChessVA computer program
. Program for playing numerous Chess variants against your PC.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Tue, Oct 3, 2006 09:09 PM UTC:
I agree, excellent update. I'll have sample games available in a day or two.

- Sam

P.S. I liked Andy's last comment.


Sam Trenholme wrote on Thu, Oct 5, 2006 04:57 PM UTC:
Andy: Get an account so people can't pretend to be you.

ChessV getting fixed: If you have problems with ChessV, please make a complete bug report. 'I can sometimes win against ChessV, when will this be fixed?' is hardly a bug report that Greg Strong can use to fix the problem in question. If you have a problem with ChessV, please *save the game* so that Greg can look at the problem.

And, yes, I see that ChessV 0.9.1 Schoolbook game is weaker that its 0.9 game. For example, ChessV 0.9.1 was white, ChessV 0.9 was black and both sides had 60 seconds to think their move on a PIII 450 in this game:

1. Pawn f2 - f4
1. Pawn f7 - f5
2. Knight h1 - g3
2. Knight c8 - d6
3. Bishop g1 - d4
3. Pawn e7 - e6
4. Knight c1 - d3
4. Bishop d8 - f6
5. Knight d3 - e5
5. Marshall I8 - h6
6. Archbishop e1 - f3
6. Knight h8 - g6
7. Pawn e2 - e3
7. Queen b8 - d8
8. Knight g3 - h5
8. Knight g6 - h4
9. Archbishop f3 - e1
9. Knight d6 - e4
10. Pawn d2 - d3
10. Pawn c7 - c5
11. Pawn d3 x e4
11. Pawn c5 x d4
12. Pawn e3 x d4
12. Pawn f5 x e4
13. Knight h5 x f6
13. Marshall h6 x f6
14. Marshall I1 - h3
14. Knight h4 x I2
15. Pawn j2 - j3
15. Pawn d7 - d6
16. Rook j1 - I1 @ I1 0 0
16. Archbishop e8 - b5
17. Bishop d1 - e2
17. Archbishop b5 x d4
18. Knight e5 - g4
18. Knight I2 - j4
19. Marshall h3 - f2
19. Archbishop d4 x f2
20. Knight g4 x f2
20. Marshall f6 - f5
21. Rook I1 - I3 @ I3 0 0
21. Marshall f5 x f4
22. Rook I3 - I4 @ I4 0 0
22. Marshall f4 - f5
23. Archbishop e1 - d2
23. Pawn e4 - e3
24. Archbishop d2 - e4
24. Queen d8 - j2
25. Archbishop e4 x f5
25. Pawn e6 x f5
26. Bishop e2 - d3
26. Queen j2 x h2
27. Bishop d3 x f5
27. Knight j4 - h5
28. King f1 - e2 @ e2 0 0
28. Knight h5 - g3
29. King e2 x e3 @ e3 0 0
29. Knight g3 x I4
30. Queen b1 - I1
30. King f8 - d8 Rook a8 - e8 @ e8 0 0 @ d8 0 0
Finally, Greg is on vacation, so fixes will take a few weeks.

- Sam


Yonin Shogi. 4-handed Shogi variant. (9x9, Cells: 81) [All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Thu, Oct 5, 2006 05:17 PM UTC:
As an aside, answers.com is just a mirror for Wikipedia. Here are some interesting Wikipedia articles on Japanese chess variants: Heian shogi Microshogi Minishogi Kyoto shogi Whale shogi Tori shogi (I actually contributed a lot to this particular article back when I was a Wikipedia editor) Yari shogi Sho shogi Cannon shogi Hasami shogi Hand shogi Annan shogi Unashogi Wa shogi Chu shogi Heian dai shogi Dai shogi Tenjiku shogi Dai dai shogi Maka dai dai shogi Ko shogi Tai shogi Yonin shogi Sannin shogi (This was discussed, but the rules were not detailed, in New Rules for Classic Games) Shogi, and, oh, for something different, Capablanca chess (The fact that my one and only Chess variant is on this last page has nothing to do with the fact I have added this to the list of Shogi games).

- Sam

Edit: More links added.


Rules of Chess: En passant capture FAQ. Answers to some questions about the en passant capture rule.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Fri, Oct 6, 2006 07:21 PM UTC:
1. e4 e6 2. e5 d5 3. exd6 (en passent) is legal in Chess; the presence of the pawn on e6 changes nothing.

- Sam


Crab. Jumps as knight but only `narrow forwards' or `wide backwards'.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Sat, Oct 7, 2006 03:32 AM UTC:
The crab by itself is a very weak piece. What makes the crab interesting is that crab + ferz (e4 to d6, f6, c3, g3, d5, f5, d3, f3), crab + wazir (e4 to d6, f6, c3, g3, e6, d5, f5, e4), crab + alfil (e4 to d6, f6, c3, g3, c6, g6, c2, g2), and crab + dabbah (e4 to d6, f6, c3, g3, e6, c4, g4, e2) are all pieces that are worth about as much as a knight. This allows one to take a chess variant that uses a knight (or even the knight part of a knight + something else, such as the Archbishop [knight + bishop] and Marshall [knight + rook]), and replace the knight by one of the above four pieces.

Another interesting idea is the crab eqivalent of a camel (e4 to d7, f7, b3, and h3), which is even weaker than a crab (colorbound). This piece doesn't have a name, so I'll call it a mirage. The 'mirage' can be combined with a ferz, alfil, or dabbah to make an interesting colorbound piece, or with a wazir to make an interesting non-colorbound piece. 'Mirage' + wazir is probably slightly less powerful than a knight on an 8x8 board, but slightly more powerful than a knight on a 10x10 board.

- Sam


[Subject Thread] [Add Response]
Sam Trenholme wrote on Mon, Oct 9, 2006 10:05 PM UTC:
Nearly 13 years ago, someone with the name "Michael N Goldshteyn" proposed a huge 14x14 Chess variant. His variant was proposed in this Usenet article:

http://groups.google.com/group/rec.games.chess/msg/aa184ce18ea1d8ae?dmode=source&hl=en

I do not think he would be overly offended if I reposted his proposed Variant, so here goes:


Here is yet another idea for a 2 player chess variant. Although not all rules have been defined yet, here goes. By the way leave me comments if you find this a good idea, as well as change possibilities to make it more fun.

Super Chess on 14x14 board

 
Piece Symbol Description
 
pawn    P    moves: forward 1, forward 1 or 2 initially
             captures: diagonally forward, all
             promotion: promotes to all but king upon reaching final rank
knight  N    moves: L shaped 2 square in one direction, 1 square at right angle
                    to first direction
             captures: same as moves and occupies that square
bishop  B    moves: Diagonaly any number unless blocked
             captures: diagonaly first enemy in path, and occupies that square
rook    R    moves: Straight line any number unless blocked
             captures: straight line first enemy in path, and occupies square
queen   Q    moves: bishop+rook
             captures: bishop+rook
camel   C    moves: similar to knight but 3 and 1 instead of 2 and 1 (bigger L)
             captures: similar to knight but 3 and 1 instead of 2 and 1
octopus O    moves: knight+bishop
             captures: knight+bishop
shifter S    moves: like king
             captures: like king
jumper  J    moves: 2 squares any direction
             captures: can jump over one enemy piece like a checker, capturing
                       it and occupying the destination square, 2 away from
                       the start square
air     A    moves: 4 squares in any combination (straight+diagonal)
             captures: any enemy along path, stopping at that square
lord    L    moves: rook+knight
             captures: rook+knight
demon   D    moves: like king
             captures: none
             special: any friendly piece touched cannot be captured, other
                      than another demon
faerie  F    moves: like bishop
             captures: like rook
envy    E    moves: like king
             captures: none
             special: give any friendly piece touching other than an envy or
                      pawn, queen like movement and capture capability, in
                      addition to normal abilities, but only for one move if
                      contact is lost on that move. Once contact is lost,
                      piece reverts to normal.
grunt   G    moves: camel+king
             captures: camel+king
             special: if captured, returns to square of origin if not occupied,
                      otherwise lost (square of origin on either side (left or
                      right) of board, permissible)
king    K    moves: 1 square any direction, but not into check, no castling
             captures: 1 square any direction, but not into check
             special: if under attack, and cannot defend, it is checkmated,
                      game over, opponent wins. Stalemate is a loss. No draws
                      accept by agreement of players.
 
Initial board configuration:
 
ernbocqkcobnre
gdflsjaajslfdg
pppppppppppppp
-+-+-+-+-+-+-+
+-+-+-+-+-+-+-
-+-+-+-+-+-+-+
d-+-+-+-+-+-+d
D+-+-+-+-+-+-D
+-+-+-+-+-+-+-
-+-+-+-+-+-+-+
+-+-+-+-+-+-+-
PPPPPPPPPPPPPP
GDFLSJAAJSLFDG
ERNBOCQKCOBNRE
I strongly recommend you print this out and look it over and tell me what you think :).
So, what do people think of this variant?

Sam Trenholme wrote on Tue, Oct 10, 2006 04:32 PM UTC:
Tony,

Done

(Technically, this is copyright infringement, but I seriously doubt Michael N Goldshteyn is going to get upset that someone remembers a Usenet posting he made nearly 13 years ago).

Thanks for the sugesstion,

- Sam


[Subject Thread] [Add Response]
Sam Trenholme wrote on Tue, Oct 10, 2006 07:06 PM UTC:
Agreed; unless either Kramnik wins the next game or game five is replayed, the state of the world champion will be in the air just as much as it was before this contest, if not more so.

- Sam


Sam Trenholme wrote on Fri, Oct 13, 2006 04:36 PM UTC:
I am glad Kramnik won; now there is, for the first time in 13 years, a world chess champion. I have always considered Kramnik the champion since he defeated Kasparov in 2000, but it's nice that there is no longer any doubt whatsoever.

The ShortRange Project. Missing description[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Wed, Oct 18, 2006 09:02 PM UTC:
I'm not sure a Knight can be accurate described as a piece that moves like a ferz than a wazir (or a ferz than wazir). I like rigourous descriptions that precisely describe a piece (can you tell I'm a computer programmer). Here would be my description of a knight: Leap:
  • N then (NW or NE)
  • E then (NE or SE)
  • S then (SW or SE)
  • W then (NW or SW)
That said, I really like the ideas presented here. I'm a little worried about powerful short range pieces making attack too difficult and defense too easy (My perpetual worry about a game being too drawish).

An interesting piece is the 'wazir then wazir', which moves as follows:

Leap:

  • (N, S, E, or W) then (N, S, E, or W)
In other words, from e5 it can move to c5, d4, d6, e3, e5 (null move), e7, f4, f6, or g5. This critter is colorbound, of course.

I have some other ideas in mind, such as defining riders and 'bulldozers', which I will detail in a later comment.

- Sam


Sam Trenholme wrote on Thu, Oct 19, 2006 04:37 PM UTC:
Greg: You have a good point. Betza said the same thing; short-range pieces with more forward movement than backward movement are more aggressive and will discourage drawish play.

Here is one possible notation for some short range pieces:

A B C D E
F G H I K
L M . N O
P Q R S T
U V W X Y
Using this notation, a Knight is a BDFKPTVX, a wazir is a HMNR, a ferz is a GIQS, and a Betza's 'crab' is a BDPT.

There are about 16 million possible pieces using this notation.

- Sam


Sam Trenholme wrote on Fri, Oct 20, 2006 04:09 PM UTC:
One way to reduce the number of draws is to add Shogi-style drops. With a lot of short range pieces and Shogi drops, a game should be dynamic and exciting.

Indeed, this is what Cherry has done with some of her .zrf packages.

- Sam


Feudal. Chesslike game of wellknown game company.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Sun, Oct 22, 2006 08:05 PM UTC:
Now that the game is out of print, I think it is OK if someone posted more detailed rules here. I understand and respect copyright, but I would hate to see this game's rules becoming lost in the sands of history.

- Sam


[Subject Thread] [Add Response]
Sam Trenholme wrote on Mon, Oct 23, 2006 03:45 AM UTC:
Ploy is available as a Zillions file Right here on the server. With regard to Feudal, this was published first by 3M, then by Avalon Hill until they were bought out by Hasbro. I get the feeling that the people involved would not object to the game rules being published online, since the game is out of print and probably never going to be published again.

I respect copyright; I also don't like the idea of ideas being destroyed because of copyright. I find it somewhat frustrating that countless chess variants from the 20th century (and probably before) are not available online. Encyclopedia of Chess Variants is out of print, and Amazon currently only has one expensive copy available. I think most of the people who invented the variants in the Encyclopedia would have freely published them here if the web and this page existed at the time; the pre-internet model of using books and magazines which you buy to spread information has the advantage that it makes content which you have to pay someone to make available (such as quality novels and stories), but the disadvantage of content no longer being available if the book does not sell.

- Sam


Sam Trenholme wrote on Mon, Oct 23, 2006 01:55 PM UTC:
The Tourney .zrf also has Ploy as one of the variants.

- Sam


[Subject Thread] [Add Response]
Sam Trenholme wrote on Tue, Dec 26, 2006 10:51 AM UTC:
Chess is dead.  OK, let me rephrase that--it was hard to come up with a
decent heading in 16 characters or less.  Chess, as a recreation studied
by humans alone is dead.  With the defeat of world champion Kramnik by a
computer this last October, and the failure of a human to defeat a
computer in a classical tournament since the 1990s, a good move in a chess
position is now found by mechanical calculation instead of human artistry.

What does this mean for chess variants?  It means that the study of
variants will now be greatly computer assisted.  This also means the end
of romantic gambits--no computer will give the king's gambit or other
romantic gambits a second thought.  It also limits tournament options--we
either allow computers to generate moves, or have a honor system that bars
tournaments being played for prizes.  

On the other hand, it does allow the automated creation of opening books. 
Greg Stong did some of this work with his ChessV program; I expanded on his
research to create an article for openings in a variant I have created
myself.  

So, computers have definitely changed the landscape.

Sunflower HexChess. Hexagonal Chess in-the-round. (Cells: 120) [All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Tue, Dec 26, 2006 10:55 AM UTC:Excellent ★★★★★
I like the new tessellation that this variant uses; there are so many
possible tessellations out there, yet most Chess variants use a plain
square tessellation.  Only sometimes do we use a plain hexagonal
tessellation; far rarer is something radical such as a board using
triangles, parachess [1], or this board.  

I applaud you for trying out a new tessellation!

- Sam

[1] http://www.chessvariants.com/shape.dir/parachess.html

[Subject Thread] [Add Response]
Sam Trenholme wrote on Mon, Jan 1, 2007 09:50 AM UTC:
Happy new year everyone!

[Subject Thread] [Add Response]
Sam Trenholme wrote on Mon, Feb 19, 2007 09:17 PM UTC:
I have uploaded a few files which are not available anywhere else. I'll need to move those files to my web page before the files section is locked out.

- Sam


Complexity of Large Variants. Some comments about the complexity of large chess/checkers variants.[All Comments] [Add Comment or Rating]
Sam Trenholme wrote on Fri, Feb 23, 2007 07:31 PM UTC:
As it turns out, the number of possible opening positions increases even faster than EXPTIME when Chess Variant boards get bigger and bigger.

From a message I posted to the old Yahoo group:

There are 1,440 setups in 8x10 chess where the queen is to the left of the queen.

If you add a single faerie piece, there are 12,600 setups for 9x8 chess (with the queen to the left of the queen).

If you add two of a single colorbound faerie piece, there are 36,000 possible 10x8 setups (with the queen to the left and all that). If you add two of the same piece which isn't colorbound, there are 63,000 possible 10x8 setups. If you add two non-colorbound pieces, such as the archbishop (bishop + knight) and the marshall (rook + knight), there are 126,000 possible setups.

126,000 setups vs. 1,440 setups. No wonder why so many more are playable.

We can go even further: If you add three unique non-colorbound pieces to FIDE chess on an 11x8 board, 1,360,800 possible setups (680,400 if we add two of one kind of piece and one of anothe kind of piece, such as two archbishops and a marshall). If we add four unique non-colorbound pieces to the FIDE mix on a 12x8 board, we have 16,329,600 starting positions with the queen to the left of the king. If we insist on making it two pairs of colorbound pieces to a 12x8 board (such as two camels and two camels + bishops), this restricts us: We have only 1,296,000 possible starting positions.

And, even further: If we have a 'Grand Chess'/Shogi setup on a 10x10 board, with the pawns on the third row and two sets of Capablanca Chess pieces (we discard the second king) behind the pawns, we have some 92,201,259,150,000 total possible setups (with the king on the right hand side).

It might take a while for the chess variant community to come with a full opening theory for each and evey one of the above setups. :)

- Sam


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