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[SOLUTION] Chess Variants (I) (#35

Jim Menard

6/15/2005 1:54:00 PM

My hacked-together solution, based on Bangkok (http://bangkok.rub...),
is at http://www.io.../rubyqu.... I need to improve the board
drawing routine and make the input more tolerant. Input for each move must be
of the form used for chess game files (e.g., "f4", "Nf6", "Nxc6").

Jim
--
Jim Menard, jimm@io.com, http://www.io...
"An operating system is a collection of things that don't fit into a
language. There shouldn't be one."
-- Dan Ingalls
6 Answers

James Gray

6/15/2005 6:43:00 PM

0

On Jun 15, 2005, at 8:54 AM, Jim Menard wrote:

> My hacked-together solution, based on Bangkok (http://
> bangkok.rubyforge.org), is at http://www.io.com/~jimm...
> quiz35/. I need to improve the board drawing routine and make the
> input more tolerant. Input for each move must be of the form used
> for chess game files (e.g., "f4", "Nf6", "Nxc6").

Egad that's short!

Unfortunately, I'm having trouble running it:

$ ruby -rubygems main.rb
/chessgame.rb:9:in `play': undefined method `board=' for
#<DisplayListener:0x39e35c> (NoMethodError)
from main.rb:5

James Edward Gray II

Jim Menard

6/15/2005 7:02:00 PM

0

James Edward Gray II wrote:
> On Jun 15, 2005, at 8:54 AM, Jim Menard wrote:
>
>
>>My hacked-together solution, based on Bangkok (http://
>>bangkok.rubyforge.org), is at http://www.io......
>>quiz35/. I need to improve the board drawing routine and make the
>>input more tolerant. Input for each move must be of the form used
>>for chess game files (e.g., "f4", "Nf6", "Nxc6").
>
>
> Egad that's short!
>
> Unfortunately, I'm having trouble running it:
>
> $ ruby -rubygems main.rb
> ./chessgame.rb:9:in `play': undefined method `board=' for
> #<DisplayListener:0x39e35c> (NoMethodError)
> from main.rb:5
>
> James Edward Gray II
>
>

Oops. Remove the line

@listener.board = @board

from chessgame.rb. I've posted a fixed file and playchess.tar.gz file to
http://www.io......quiz35/. That's what I get for making a
last-minute change without any tests. (Bangkok has tests, but not this simple
playchess interface.)

Jim
--
Jim Menard, jimm@io.com, http://www.io...
"An operating system is a collection of things that don't fit into a
language. There shouldn't be one."
-- Dan Ingalls

James Gray

6/15/2005 7:15:00 PM

0

On Jun 15, 2005, at 2:02 PM, Jim Menard wrote:

> Oops. Remove the line

You're going to wish I would shut pretty soon, but...

It's not notifying me of checkmates and looking at the code it seems
like it should. Am I missing something?

$ ruby -rubygems main.rb
BR BN BB BQ BK BB BN BR
BP BP BP BP BP BP BP BP




WP WP WP WP WP WP WP WP
WR WN WB WQ WK WB WN WR
White: e4
BR BN BB BQ BK BB BN BR
BP BP BP BP BP BP BP BP


WP

WP WP WP WP WP WP WP
WR WN WB WQ WK WB WN WR
Black: e5
BR BN BB BQ BK BB BN BR
BP BP BP BP BP BP BP

BP
WP

WP WP WP WP WP WP WP
WR WN WB WQ WK WB WN WR
White: Bc4
BR BN BB BQ BK BB BN BR
BP BP BP BP BP BP BP

BP
WB WP

WP WP WP WP WP WP WP
WR WN WB WQ WK WN WR
Black: Nc6
BR BB BQ BK BB BN BR
BP BP BP BP BP BP BP
BN
BP
WB WP

WP WP WP WP WP WP WP
WR WN WB WQ WK WN WR
White: Qf3
BR BB BQ BK BB BN BR
BP BP BP BP BP BP BP
BN
BP
WB WP
WQ
WP WP WP WP WP WP WP
WR WN WB WK WN WR
Black: d6
BR BB BQ BK BB BN BR
BP BP BP BP BP BP
BN BP
BP
WB WP
WQ
WP WP WP WP WP WP WP
WR WN WB WK WN WR
White: Qxf7
BR BB BQ BK BB BN BR
BP BP BP WQ BP BP
BN BP
BP
WB WP

WP WP WP WP WP WP WP
WR WN WB WK WN WR
Black:

James Edward Gray II

Jim Menard

6/15/2005 8:07:00 PM

0

James Edward Gray II wrote:
> You're going to wish I would shut pretty soon, but...
>
> It's not notifying me of checkmates and looking at the code it seems
> like it should. Am I missing something?

No, I missed something. Bangkok reads pre-existing chess game files. Those
files contain standard chess move strings that have modifiers that explicitly
say "check" or "checkmate". Bangkok notifies the listener when it sees those;
it does not look at the pieces and determine if there is a check or checkmate.

I think I'd better withdraw my solution. It isn't a solution to the quiz you
posed. Oh, well, Only 15-20 minutes of my life wasted.

Jim
--
Jim Menard, jimm@io.com, http://www.io...
"An operating system is a collection of things that don't fit into a
language. There shouldn't be one."
-- Dan Ingalls

Jim Menard

6/15/2005 8:13:00 PM

0

Jim Menard wrote:

> I think I'd better withdraw my solution. It isn't a solution to the quiz you
> posed. Oh, well, Only 15-20 minutes of my life wasted.

I'm sorry that I wasted *your* time, though.

Jim
--
Jim Menard, jimm@io.com, http://www.io...
"An operating system is a collection of things that don't fit into a
language. There shouldn't be one."
-- Dan Ingalls

James Gray

6/15/2005 8:15:00 PM

0

On Jun 15, 2005, at 3:07 PM, Jim Menard wrote:

> No, I missed something. Bangkok reads pre-existing chess game
> files. Those files contain standard chess move strings that have
> modifiers that explicitly say "check" or "checkmate". Bangkok
> notifies the listener when it sees those; it does not look at the
> pieces and determine if there is a check or checkmate.

I must say, I had seen Bangkok on RubyForge before and wondered about
it. That is one unique concept you've got for a library there. It's
very interesting and I'm glad I've now had an excuse to look a little
deeper at it.

> I think I'd better withdraw my solution. It isn't a solution to the
> quiz you posed. Oh, well, Only 15-20 minutes of my life wasted.

I still found it informative and I'm glad you sent it in. It is a
good example for part II of this crazy idea of mine...

James Edward Gray II