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Three Player Chess. Commercial Chess variant for three players.[All Comments] [Add Comment or Rating]Neat connectivity. In this case the board itself was patented(and not as a design patent) for use with any and every mix of pieces. Noticing the number 3652091 and comparing it to say Gothic Chess USP6481716, show that almost half of USA patents in all fields were granted in the last 35 years of 200 years altogether. That pattern, typified elsewhere, is partly explained by the flood of high-tech innovations, computers, biotechnology. 'Games' class of (method) patents go back at least to the 1880's when some interesting US Civil War board games appear patented.