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

Enter Your Reply

The Comment You're Replying To
H. G. Muller wrote on Sat, Jul 5, 2008 11:21 PM UTC:
This Falcon is a very nasy piece to program. The multi-path character of its moves subverts all properties of pinned pieces on which my engine Joker relies for efficient legal-move generation. There is no longer a well-defined pin line: pieces pinned by a Falcon can often move in multiple directions without exposing the King. Also it is no longer sure that a pinned slider cannot move along its pin line to block a check by another piece (if this other piece is a Falcon). A check by a Falcon can have the character of a contact check (for interposing is not an option if the King is checked through multiple paths) despite being inflicted from a distance.

I guess I will simply generate moves as if the enemy Falcons have no moves, (so generating pseudo-legal moves with pieces pinned by a Falcon, and with other pieces when in check by a Falcon), and then test for their legality afterwards (by testinng if an enemy Falcon happened to be aligned with our King, and then testing all the generated moves for leading to a position where this Falcon is sufficiently blocked). Cumbersome, but I don't see an efficient alternative.

Edit Form

Comment on the page Falcon 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.