Check out Grant Acedrex, our featured variant for April, 2024.

Enter Your Reply

The Comment You're Replying To
🕸Fergus Duniho wrote on Mon, Feb 28, 2011 02:21 AM UTC:

Oh, wait. I understand the criticism now. By beginning with the King, it gives equal probability to six different sets of combinations, but these sets of combinations differ in size. When the King is toward the edge, the sets are smaller than when the King is toward the middle. So, any particular combination with the King in the middle is less likely to be chosen than any particular combination with the King towards the edge.

According to statistics I just took, the Queen appears on each space exactly 120 times, the Knight and Bishops appear on each space exactly 240 times, and only the King and Rooks vary in the frequency that they appear on each space. So, to assure equal probability of each combination, the Queen, Bishops, and Knights should go on first. The order these are placed relative to each other doesn't matter. Then the three remaining spaces should be filled in with Rook, King, Rook. So I have changed the code to the following:

  drop B any a1 c1 e1 g1;
  drop B any b1 d1 f1 h1;
  drop Q any a1 b1 c1 d1 e1 f1 g1 h1;
  drop N any a1 b1 c1 d1 e1 f1 g1 h1;
  drop N any a1 b1 c1 d1 e1 f1 g1 h1;
  drop R first a1 b1 c1 d1 e1 f1;
  drop K first b1 c1 d1 e1 f1 g1;
  drop R last c1 d1 e1 f1 g1 h1;

Edit Form

Comment on the page Fischer Random Chess

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.
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.