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Fischer Random Chess


Recognized! Recognized Variant of the Month for April 2002. Twelve times per year we will select a Recognized Variant for special consideration. Its web page will be reworked and improved and a connecting link displayed on all of our CV Pages. We hope to encourage CVPhiles to read about, play and explore this featured variant.

Introduction

Bobby Fischer, a former world chess champion, proposed a variant of Orthodox Chess wherein the initial setup of pieces is chosen randomly. Fischer thereby joined the ranks of other former world champions, such as Capablanca, who proposed changes to the rules of chess -- none of which were ever implemented. Fischer Random Chess is somewhat similar to the older Shuffle Chess, or Prechess (or other related variants), yet has a unique style of its own. An extensive introduction and history of the game was written by Eric van Reem.

Setup

Fischer Random Chess is played with an Orthodox Chess set but employs a randomly generated array. Each new setup is determined by a computer program (or manual procedure) which assigns starting squares according to the following guidelines:

Pieces

Orthodox Chess pieces are used exclusively.

Rules

Orthodox Chess rules apply when applicable.

Castling may be performed under the following conditions:

A King may castle with its a-side Rook or its h-side Rook. When castling a-side, the King and Rook go to the same spaces they would go when Queen-side castling in Chess. When castling h-side, the King and Rook go to the same spaces they would go when King-side castling in Chess. This table shows where the King and Rook end up for each type of castling.

White castles a-sideKc1, Rd1
White castles h-sideKg1, Rf1
Black castles a-sideKc8, Rd8
Black castles h-sideKg8, Rf8

More detailed rules may read at Bobby Fischer's website:

Computer Play

If you have Zillions of Games installed on your computer, you can play this game. Download file: fischer.zip.

Number of Possible Arrays

Terumi Kaneyasu (Sam Sloan?) writes:

Fischer Random Chess has 960 legal arrays. This number is determined as follows:

First, place the two Bishops. There are 16 different ways for one bishop to be on a white square and the other Bishop to be on a black square.

That leaves six empty squares. Now, place the King somewhere between the two Rooks. There are 20 different ways for a King and two Rooks to occupy six squares with the King in between.

That leaves three squares for the two Knights and the Queen. There are three possible ways to place these pieces.

Thus, there are 16 x 20 x 3 (960) legal arrays in Fischer Random Chess.


Written by various authors. Information based on news postings by Terumi Kaneyasu; send to me by Terumi Kaneyasu and Dennis Breuker. Modest Solans noticed an error in an earlier version. The picture of Fischer is from Palle Mathiasen's World Chess Champions site. Edited by John William Brown for the occasion of this variant being selected Recognized Variant of the Month for April 2002. Rules corrected by Fergus Duniho in May, 2004.
WWW page created: 1995 or 1996.

The above was authored by: Terumi Kaneyasu and Fergus Duniho. The above was invented by: Robert J. Fischer.
The above was edited/posted by: Fergus Duniho
Created on: 1996. Last modified on: May 11, 2004.

See also:

Progressive Fischer Random Chess Contest 1998.
The Birth of Fischer Random Chess. Author: Eric van Reem Inventor: Robert J. Fischer
Castling in Chess 960. New castling rules for Fischer Random Chess. By: John Kipling Lewis
Chess480. By: John Kipling Lewis
Fischer Random Chess. David A. Wheeler's page on Fischer Random Chess. (Link) Author: David A Wheeler Inventor: Robert J. Fischer
Reglas del AJEDREZ ALEATORIO DE FISCHER. Author: Modest Solans Inventor: Robert J. Fischer
Adams, Michael. An Interview about a Fischer Random Chess match.
Interview with Peter Leko. An interview about a Fischer Random Chess match.
Fischer Random Chess. Random symmetric starting positions. Author: Ed Friedlander Inventor: Robert J. Fischer
Fischer Random Chess - News. Author: Modest Solans Inventor: Robert J. Fischer
Fischer Random Chess. Play Bobby Fischer's randomized Chess variant on Game Courier Author: Fergus Duniho Inventor: Robert J. Fischer
FischerRandom Program. Generates random starting positions. (Link) Author: Nicklas Johansson
Fischer Random Chess. Manual Procedure for Generating Piece Placements Author: Hans L. Bodlaender
Fischer Random Chess email Club. (Link) Author: Fergus Duniho
Fischerandom Chess Resource Page. This page provide links, saved tournament games in PGN format, and downloads related to Fisher Random Chess. (Link) Author: Graeme Carey
Fischer Random Chess. Play from a random setup. (Zillions of Games file) Author: Pierre Tourigny Inventor: Robert J. Fischer

See also:

Alapo. Game with abstract pieces. Reach opponents first row on 6 by 6 board. Author: Hans L. Bodlaender Inventor: Johannes Tranelis
Almost chess. One queen has combined rook and knight moves. Author: Hans L. Bodlaender and Ralph Betza Inventor: Ralph Betza
Archchess. Large chess variant from 17th century Italy. Author: Hans L. Bodlaender Inventor: Dr. Francesco Piacenza
Augmented Different Knights. Knights receive different additional movement possibilities. By: Ralph Betza
Berolina Chess. Different moving pawns Author: Hans L. Bodlaender
Capablanca's chess. An enlarged chess variant, proposed by Capablanca Author: Hans L. Bodlaender and David Howe Inventor: Jose Raul Capablanca
Chess with Different Armies. Betza's classic variant where white and black play with different sets of pieces By: Ralph Betza
Courier Chess. A large historic variant from Medieval Europe Author: Hans L. Bodlaender
Cylindrical chess. Sides of the board are supposed to be connected Author: Ron Porter and Cliff Lundberg
Extinction chess. Win by making your opponents pieces of one type extinct Author: Hans L. Bodlaender and Antoine Fourrière Inventor: R. Wayne Schmittberger
Kinglet. Win by taking all the pawns of the opponent Author: Hans L. Bodlaender Inventor: Vernon Rylands Parton
Los Alamos variant. Chess on a 6 by 6 board from the early days of computing. Author: Hans L. Bodlaender
Polymorph Chess. Knights and Bishops can morph into each other or into combined pieces. By: Greg Strong
Shatranj. The widely played historic Persian game, predecessor of modern chess. Author: Hans L. Bodlaender
Switching Chess. In addition to normal moves, switch with an adjacent friendly piece. By: Tony Quintanilla
ChessV Universal Chess Program. Open source universal Chess program with a graphical user-interface. (Link) Author: Greg Strong

Comments

DateNameRatingComment
2006-02-27Reinhard Scharnagl None
Hi Gene, I mentioned your book near to mine at my SMIRF / ChessBox pages:
http://www.chessbox.de/Compu/schachbuch.html . Unfortunately my German
language book on Chess960 is sold only rarely about 10 pieces per quarter.
So I hope for you to have better success with yours ... ;-)

Your book is enlighting a lot of details also on 'fights' about right or
wrong extended FEN and move representation for engines playing Chess960.
Meanwhile the unnecessarily invented Fritz numbering scheme for Fischer
Random Chess luckily has been withdrawn by an update of that program.

Regards, Reinhard.
2006-02-17Juan Pablo Excellent
Very good, I hope you can develop a chess game to download and promote de
fischerandom,

cheers from Argentina
2006-02-13Gene Milener None
It is significant news for chess960 (a.k.a. Fischer Random Chess) when a
major new chess book is published that is largely devoted to chess960.

I therefore would like to encourage the editors to add mention of this
new
chess960 book to this web page.

The book info is:

Play Stronger Chess by Examining Chess960:
Usable Strategies of Fischer Random Chess Discovered
   by
Gene Milener

ISBN  0-9774521-0-7
Page count 252

More information, including an extended excerpt, is available at
http://CastleLong.com/.

Available at Amazon.com and Amazon.co.uk, BarnesAndNoble.com, and
elsewhere.

This chess book is about both chess960 and chess1, because it compares
and
contrasts them.  This teaches us things about both rule sets that are
harder to see when studying either in isolation.

Thank you.
2005-11-08M. Thompson None
Yes, but was Fischer just being Fischer? The question has been asked
before. By the way, Karpov says he will play Fischer, even if it is FRC,
and there is an article out now showing Fischer meeting with Kasparov!!!!
Can this be true? http://www.GothicChess.com/news.html is the link.
Exciting stuff if it were so.
2005-10-14Derek Nalls None
Fischer vs. Topalov
Fischer Random Chess
http://www.novinite.com/view_news.php?id=53662

According to this news report, both are willing to play one another.
Will negotiations over money and the details of the competition hold-up,
though?

This item has a total of 60 comment(s), 21 rating(s), and an average rating of Good. View all comments for this item.

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Last modified: Friday, May 20, 2005