The Chess Variant Pages

Check out Gross Chess, our featured variant for June, 2023.

Enter Your Reply

The Comment You're Replying To
Robert Price wrote on 2003-05-02 UTC
The game Edge Chess, by Mitch Martin, might be added to this discussion. In that game, a piece that can move to a (single) square is also allowed to 'expand' and occupy surrounding spaces as well. In this way, any piece on any move can become what appears to be a twofold or fourfold piece. An enlarged piece is vulnerable (since it can be captured on any of the squares it occupies) and maneuverable, having the ability to use any of its occupied squares as a departure space. Effectively, the piece shrinks to normal size, then moves, then has the option of expanding again, which is an alternative behavior to the two- and fourfold pieces described in this article. As a result of the size-shifting, Bishops are not colorbound, and Pawns can move unusually quickly across the board by always expanding into the next square forward.

Also, the large variant Microorganism Chess by Mark E Hedden and Bryan Weaver contains an Amoeba piece (of which each player has two). To quote:

They move either as a bishop or jump 3 spaces like a rook. But, it has one unique characteristic. It can expand from being a piece that takes up 1 square to a piece that takes up two squares orthoganally next to each other. However, both of these squares must be empty in order for it to be able to expand. Once expanded, it can take two pieces in the same turn, and generally be very dangerous. Also, it can, once expanded, contract back to its original size.
I presume that the entire width-two path of the expanded Amoeba has to be unoccupied when it wants to move as a bishop. So, the Amoeba in its expanded form is an example of a true twofold piece.

Edit Form

Comment on the page Growing and Shrinking: Playing with the Size of Chess Pieces

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.