Other Bizarre Chess Boards!

"Trichotomy" http://sandfly.net.nz/blog/2006/12/trichotomy-a-chess-varient/

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Played with marbles http://homepages.di.fc.ul.pt/~jpn/gv/dob.htm

(this site also has other variants)

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Played with cards http://www.gamedev.net/columns/events/gdc2003/view.asp?SectionID=2

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"Melee" http://www.castlepointgames.com/melee.html

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Nine knights? http://www.quadibloc.com/chess/ch0402.htm
(this site also has many other cool variants)

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Four player corner chess http://blogs.indystar.com/geek/2008/08/

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Six player chess http://www.endprod.com/chess/6a.htm

(this site also has other variants)
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Three player hexagonal board http://www.mastersgames.com/cat/board/chess-3-player.htm

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"Waider's chess" http://www.quadibloc.com/chess/ch0501.htm

(this site also has many other variants of three-way chess)

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Star-shaped chess http://newton.umsl.edu/philf//nplchess/

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Four player chess http://www.academicchess.org/contact/linkspages/chess-variants.htm

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Expanded board "Super Chess" http://www.freepatentsonline.com/6702287.html

(use the search engine for more chess inventions)

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One player chess http://newton.umsl.edu/infophys/wuzzlers.html

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Five player chess http://www.quadibloc.com/chess/ch0205.htm

(a couple other amazing variants on this website)

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"Martian Chessboard" http://www.ee0r.com/tri-chess/

(this is the three-player version...the site also contains four-, five-, and six-player versions)

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Six player circular board http://kentropic.wordpress.com/

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Three player circular board http://www.douglaswilliamsmith.net/Trinity_Chess/Three_Player_Chess_Comparative_Review.htm (this site has a few other variants, such as trigon chess)

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Three player chess with hexagonal squares http://www.thetoyman.com/top_50_2009.html

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"Pikemen" http://www.playagaingames.com/games/pikemen/

(various setups)