You are on the backup site for Chessvariants.com. Any posts, moves, or other changes you make here will not be permanent, because the pages and database from the main site will be backed up here every midnight EST. Additionally, things may not be working right, because this site is also a testbed for newer system software. So, if you are not here to test, develop, or merely read this site, you may want to change .org to .com in the navigation bar and go to the main site.



The Chess Variant Pages



This page is written by the game's inventor, Fergus Duniho. This game is a favorite of its inventor.

Enter Your Reply

The Comment You're Replying To
Fergus Duniho wrote on 2015-04-02 UTC
Thank goodness I wrote the notes on this game when I made this page ten years ago. It helped me figure out what my ZRF code was doing, so that I could fix a bug I just discovered recently. The bug concerned the code I wrote to make blocks made on the second part of a move ineffective. It inadvertently allowed a Rook check when the checking player's last move was to move a Pawn forward. It now checks the side of the piece last moved, confirming that it belongs to the other side, and it now blocks checks on the space the last piece to move moved from.

The ZRF still allows a player to make moves that do not end check on his King. But it's because of this limitation that the rules and ZRF are designed to prevent the second move from effectively rescuing a King from check. This assures that any first move that leaves one's King in check will automatically end the game in checkmate. Game Courier can stop this, but when playing Zillions, it's up to the player to not accidentally move into checkmate. Of course, with Zillions, the player has the option of undoing his move and continuing on.

Edit Form

Comment on the page Extra Move Chess

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.