David Singmaster

David Singmaster, born in December nineteen thirty-eight, was a distinguished American-British mathematician renowned for his contributions to the field of mathematics and his passion for puzzles. He served as an emeritus professor of mathematics at London South Bank University in England, where he inspired countless students and colleagues alike.

Singmaster was particularly celebrated for his extensive personal collection of mechanical puzzles and books filled with brain teasers. His enthusiasm for the Rubik's Cube set him apart as an early adopter and a fervent promoter of this iconic puzzle. In nineteen seventy-nine, he began compiling his influential work, 'Notes on Rubik's