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Tetrahedral Chess. Three dimensional variant with board in form of tetrahedron. (7x(), Cells: 84) [All Comments] [Add Comment or Rating]
George Duke wrote on Wed, Jul 2, 2008 04:43 PM 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.