Check out Atomic Chess, our featured variant for November, 2024.

Enter Your Reply

The Comment You're Replying To
Derek Nalls wrote on Fri, Nov 7, 2008 06:46 AM UTC:
Upon closer consideration, I have decided to cancel 3 out of the 4 planned
playtests using Joker80 running under Winboard F to play Embassy Chess
(mirror).  The reason is that I suspect they are probably untestable
conclusively within an achievable amount of time and number of games since
differences of less than 5% in value between the CRC pieces under study are
expected.  Obviously, 'untestable playtests' are oxymorons indicative of
a total waste of CPU time.

Please allow me to show the numbers behind my thinking based upon the
present CRC piece values models of Nalls & Muller.  

[Unfortunately, I no longer regard the CRC model of Scharnagl as being
sufficiently refined in compliance with experimental results to yield
accurate, predictive values.]
_____________________________

playtest #1
Embassy Chess (mirror)
1 queen missing vs. 2 rooks missing

Nalls

rook    59.43
queen  115.18

2 rooks / 1 queen = 1.0319

Muller

rook    55.88
queen  111.76

2 rooks / 1 queen = 1.0000
__________________________

average
(Nalls & Muller)

2 rooks / 1 queen = 1.0160

Conclusion- untestable!
_______________________

playtest #2
Embassy Chess (mirror)
1 archbishop missing vs. 1 rook + 1 bishop missing

Nalls

bishop       37.56
rook         59.43
archbishop   98.22

1 rook + 1 bishop / 1 archbishop = 0.9875

Muller

bishop       45.88 
rook         55.88
archbishop  102.94

1 rook + 1 bishop / 1 archbishop = 0.9885
__________________________________________

average
(Nalls & Muller)

1 rook + 1 bishop / 1 archbishop = 0.9880

Conclusion- untestable!
_______________________

playtest #3
Embassy Chess (mirror)
1 chancellor missing vs. 1 rook + 1 bishop missing

Nalls

bishop       37.56
rook         59.43
chancellor  101.48

1 rook + 1 bishop / 1 chancellor = 0.9558

Muller

bishop       45.88 
rook         55.88
chancellor  105.88

1 rook + 1 bishop / 1 chancellor = 0.9611
__________________________________________

average
(Nalls & Muller)

1 rook + 1 bishop / 1 chancellor = 0.9585

Conclusion- untestable!
________________________

playtest #4
Embassy Chess (mirror)
1 archbishop missing vs. 1 rook + 1 knight missing

Nalls

knight       30.77
rook         59.43
archbishop   98.22

1 rook + 1 knight / 1 archbishop = 0.9183

Muller

knight       35.29
rook         55.88
archbishop  102.94

1 rook + 1 knight / 1 archbishop = 0.8857
__________________________________________

average
(Nalls & Muller)

1 rook + 1 knight / 1 archbishop = 0.9020

Conclusion- testable!
______________________

Thus, I will begin playtest #4 very soon.

Edit Form
Conduct Guidelines
This is a Chess variants website, not a general forum.
Please limit your comments to Chess variants or the operation of this site.
Keep this website a safe space for Chess variant hobbyists of all stripes.
Because we want people to feel comfortable here no matter what their political or religious beliefs might be, we ask you to avoid discussing politics, religion, or other controversial subjects here. No matter how passionately you feel about any of these subjects, just take it someplace else.
Avoid Inflammatory Comments
If you are feeling anger, keep it to yourself until you calm down. Avoid insulting, blaming, or attacking someone you are angry with. Focus criticisms on ideas rather than people, and understand that criticisms of your ideas are not personal attacks and do not justify an inflammatory response.
Quick Markdown Guide

By default, new comments may be entered as Markdown, simple markup syntax designed to be readable and not look like markup. Comments stored as Markdown will be converted to HTML by Parsedown before displaying them. This follows the Github Flavored Markdown Spec with support for Markdown Extra. For a good overview of Markdown in general, check out the Markdown Guide. Here is a quick comparison of some commonly used Markdown with the rendered result:

Top level header: <H1>

Block quote

Second paragraph in block quote

First Paragraph of response. Italics, bold, and bold italics.

Second Paragraph after blank line. Here is some HTML code mixed in with the Markdown, and here is the same <U>HTML code</U> enclosed by backticks.

Secondary Header: <H2>

  • Unordered list item
  • Second unordered list item
  • New unordered list
    • Nested list item

Third Level header <H3>

  1. An ordered list item.
  2. A second ordered list item with the same number.
  3. A third ordered list item.
Here is some preformatted text.
  This line begins with some indentation.
    This begins with even more indentation.
And this line has no indentation.

Alt text for a graphic image

A definition list
A list of terms, each with one or more definitions following it.
An HTML construct using the tags <DL>, <DT> and <DD>.
A term
Its definition after a colon.
A second definition.
A third definition.
Another term following a blank line
The definition of that term.