The Chess Variant Pages



This page is written by the game's inventor, Uli Schwekendiek.

Enter Your Reply

The Comment You're Replying To
Bn Em wrote on 2021-03-15 UTC

@Uli:

Re Duke's variant and patent: whilst it was, indeed, probably an exercise in extending the patent's scope, I'd argue that technically he did describe this variant first (and strictly speaking patents are a different thing from copyright, and I'm not convinced that someone patenting a new set of chords (perhaps in some unusual tuning?) that wasn't in prior use coudn't in fact claim a breach of patent on anything using them, though ofc IANAL) — however you rightly point out that he came to different conclusions, and that merely having described it as part of a set of possibilities doesn't mean that he should be credited for it (H. G. Muller's analogy with integers is apt here). My main point was that it's more interesting (at least for me ☺︎) to acknowledge the commonalities (as you have now, indeed, done) and explore the differences within that than to insist that everything is unique and special in itself.

Also I agree, naming things is hard (which is partly why it was uncanny that you ended up with the same name as Duke did).

@Jörg:

Strictly speaking Kestrel has been used (by Gilman, predictably enough) for a piece — just not in any games. It's the compound of (stepping) Falcon and Kite (the latter moving as falcon but replacing orthogonal steps with ‘nonstandard’ (i.e. √3) diagonal ones) according to M&B13.


Edit Form

Comment on the page ChessXp

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.

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.