History of Puzzles: Six Classic Puzzles and Where They Came From
A short history of puzzles: eight queens in 1848, the 15-puzzle from the 1870s, the 70 square, coin weighing, truth-tellers and colour cubes.
Riddle10 blog
Riddle10 blog
A short history of puzzles: eight queens in 1848, the 15-puzzle from the 1870s, the 70 square, coin weighing, truth-tellers and colour cubes.