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The Puzzle King: Sam Loyd's Chess Problems and Selected Mathematical Puzzles by Pickard, Sid, Editor - 1996
Map, Novelty, Get Off the Earth Puzzle, Cartographic Curiosity, Antique, 1918 – George Glazer Gallery, Antiques
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Sam Loyd's Cyclopedia Of Puzzles (1914)" - Copyright J. A. Storer
This is THE DISAPPEARING BICYCLIST puzzle by 18th Century mathematician Sam Loyd. In position 'A' 13 boys are visible, but in position 'B' - only 12. One is invited to determine which
Math Games: The Sam Loyd Cyclopedia of Puzzles
