Sam Loyd

Samuel Loyd (January 31, 1841 - April 10, 1911) was an American puzzle author and recreational mathematician.

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Loyd popularized and is usually credited with the invention of the fifteen puzzle. He also authored a number of chess problems, often with witty themes. Following his death, his book Cyclopedia of Puzzles was published (1914).

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An enthusiast of Tangram puzzles, Loyd published a book of seven hundred unique Tangram designs and a fanciful history of the origin of the Tangram. Europe and America were experiencing a Tangram craze at the time, and Loyd's popular book earned him a significant amount of income.

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January 31: January 31 is the 31st day of the year in the Gregorian Calendar. There are 334 days remaining, (335 in leap years). January 31 is also the last day of January....

1841: 1841 is a common year starting on Friday (link will take you to calendar)....

1911: 1911 was a common year starting on Sunday (click on link for calendar)....

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