The Chess Variant Pages

Check out Expanded Chess, our

featured variant for September, 2023.

This page is written by the game's inventor, Ben Good.

Enter Your Reply

The Comment You're Replying To
SL Reed wrote on 2018-12-27 UTCGood ★★★★

I just began play-testing and I like it a lot.  My thoughts so far:

There is a tiny bit of ambiguity as to whether the “same file rule” from Shogi is meant to apply to pawn drops (presumably it is not). I believe it can be played either way. I haven't tested it yet, but to try, the following condition could apply:

A pawn may not be dropped onto the same vertical diagonal of any other non-promoted pawn belonging to the same player.

Or an even stricter alternative:

A pawn may not be dropped onto the same rank or file of any other non-promoted pawn belonging to the same player.

In the illustrations for piece movement, notice how the rook travels through one edge and then through the opposite edge of each square in its path (even if the 'square' curves a right angle), while the bishop travels through one corner and then through the opposite corner of each square in its path, but seems to be prohibited from doing so on the curved squares (from the black bishop's position in the diagram). If this prohibition were lifted, that same black bishop's range of movement would include traveling from one curved edge square to the next and then back across the board horizontally, forming a loop back to it's original position.

Also, although it is not explicitly mentioned in the original rules, I think it's probably a good idea to declare that a rook or  a queen (or a bishop) may not land on the square from which they originated on that turn, even if a path to it exists unobstructed.

Finally, my thoughts about the pawn. The language and illustration of the original rules regarding pawn movement suggests that pawns capturing moves and non-capturing moves are executed in the same way (unlike conventional chess). Optionally, one could alter the rules for pawn movement so that it moves (but does not capture) exactly one square in either of the orthogonal directions that is away from its own side of the playing board or it can capture to the cell diagonally ahead of it (if there is an enemy piece occupying that square).

I just made my copy of the board yesterday, and have only had the opportunity to play-test the original rules.  But yeah, it was a lot of fun!  Thanks!

Edit Form

Comment on the page Crazy 38's

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.