2 puzzles from Noyes Chapman, each explained in a minute and credited to the original work. Free on Savvy.
The 15 puzzle has fifteen numbered tiles sliding in a 4x4 frame. In 1880, puzzle-maker Sam Loyd offered $1,000 to anyone who could take a puzzle with tiles 14 and 15 swapped and sl…
— Sam Loyd (popularizer); Noyes Chapman (inventor), The 15 Puzzle
The 15 Puzzle — fifteen numbered tiles sliding in a 4x4 grid with one gap — became a national craze in 1880. Puzzle showman Sam Loyd claimed for the rest of his life that he'd inve…
— Noyes Chapman (inventor); falsely claimed by Sam Loyd, 15 Puzzle