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This item is a game information page
It belongs to categories: Orthodox chess, 
It was last modified on: 2002-11-01
 By Mark  Thompson. Tetrahedral Chess. Three dimensional variant with board in form of tetrahedron. (x7, Cells: 84) [All Comments] [Add Comment or Rating]
George Duke wrote on 2008-07-02 UTC
This is the neatly-connected CV we recognize at Chessboard Math and that inspires our 84-cell variation, more or less from tetrahedral numbers Mark Thompson talks about here. Actually, there instead, square numbers 1 and 4 are also tetrahedral numbers, and the total 84 is tetrahedral number, also being 1+9+25+49, four levels.