Check out Janggi (Korean Chess), our featured variant for December, 2024.

Enter Your Reply

The Comment You're Replying To
Derek Nalls wrote on Mon, May 26, 2008 11:36 PM UTC:
Rest assured, I intend to drop this futile topic of conversation soon and
leave you alone.

The following is my impression of how the limited randomization of 
move selection that you have described as being at work within Joker80
must be harmful to the quality of moves made (on average) at long 
time controls.  Since you have experience and knowledge as the
developer of Joker80, I will defer to you the prerogative to correct 
errors in my inferred, general understanding of its workings.
_______________________________________________________

short time control
1x

At an example time control of 10 seconds per move (average),
Joker80 cuts thru 8 plies before it runs out of time and must
produce a move.  At the moment the time expires, it has selected 12 
high-scoring moves as candidates out of a much larger number of 
legal moves available.  Generally, all of them score closely together
with a few of them even tied for the same score.  So, when Joker80 
randomly chooses one move out of this select list, it has probably not 
chosen a move (on average) that is beneath the quality of the best 
move it could have found (within those severe time constraints)
by anything except a minor amount.  In other words, the damage to 
playing strength via randomization of move selection is minimized 
under minimal time controls.
___________________________

long time control
360x

At an example time control of 60 minutes per move (average),
Joker80 cuts thru 14 plies (due to its sophisticated advance pruning
techniques) before it runs out of time and must produce a move.  
At the moment the time expires, it has selected only 4 high-scoring 
moves as candidates out of a much larger number of legal moves 
available.  Generally, all of them score far apart with a probable 
best move scored significantly higher than the probable second best 
move.  So, when Joker80 randomly chooses one move out of this 
select list, the chances are 3/4 that it has ignored its probable best
move.  Furthermore, it may not have chosen the probable second best move,
either.  It just as likely could have chosen the probable third or fourth
best move, instead.  Ultimately, it has probably chosen a move 
(on average) that is beneath the quality of the best move it may have 
successfully found by a moderate-major amount.  In other words, 
the damage to playing strength via randomization of move selection is 
maximized under maximal time controls.
_______________________________________

The moral of the story is that randomization of move selection reduces 
the growth in playing strength that normally occurs with time and plies 
completed.

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.