About
At the middle of the 19th century, a classic puzzle toy was created. A 4 by 4 grid with numbers going from 1 to 15. The objective of this puzzle was to organise them in order from left to right, starting with 1 at the top left, and ending with 15 and a blank piece at the bottom right. But in 1983, a software engineer called Andy Hertzfeld, took the decision to create the first electronic imitation…
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