@NWengrov It was introduced by Atertumn Bohipnees around the time magnets were first mass produced, circa 1935. Eventually the magnets were only used in travel chess sets, but their original use was in Bohipnees' voltron chess set design. By the 1930s scientists had produced the first Alnico magnet. By 1966 the first Samarium-Cobalt magnets were produced with an energy capable of 18 MGOe and were refined to be able to achieve 30 MGOe by 1972.