Interview with Iberlynx Mobile – History of N-Puzzle

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Continue our interview with Iberlynx Mobile. Mr. Rogelio would tell us his discovery on the history of N-Puzzle during the game development.

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Updated:October 4th, 2012


Interviewed by: Emily Wong
Developer: Iberlynx Mobile

Android Park:  Continue our interview with Iberlynx Mobile.  Mr. Rogelio would tell us his discovery on the history of N-Puzzle during the game development.

Android Park: Would tell us your discovery on the history of N-Puzzle during the game development ?

Iberlynx Mobile: A funny story was this: Testing the game on 3×3, there was some times it was impossible finish the puzzle. We studied the theory of n-puzzles and discovered there was irresoluble initial position. And we discovered the history of n-puzzle:

“For a long time it was not clear when the first slide puzzle was invented or made. But it is was thought to be a well known fact that in 1878 Sam Loyd, America’s greatest puzzle-expert, “drove the whole world crazy” (in his own words) with his newly “discovered” 14-15 puzzle. This was a variation on the “Puzzle of 15″ which was made and sold by the Embossing Company from New York about 10 years earlier. This puzzle consisted of 15 numbered square pieces that could be slided around in a square box that was big enough to contain 16 pieces. The pieces should be placed at random in the box and you should sort the pieces in ascending order without taking the pieces out of the box (so the only thing that is allowed is to slide the pieces). Not every randomly placed pattern of pieces can be sorted by just shuffling and Sam Loyd cleverly made use of this fact.

It was not surprising that Sam drove the whole world crazy by his variation of the puzzle of 15. The problem that he formulated was impossible to solve. When you bought Sam’s 14-15 puzzle the empty square was positioned bottom right. The pieces were numbered in order from left to right and from top to bottom; only the pieces numbered 14 and 15 were reversed. You should re-order the pieces so all the pieces are in the correct position and the empty place should be positioned bottom right again. For the correct solution a prize of 1000 dollar was offered but Sam kept that money in his pocket. A slide puzzle with square pieces can only be solved when the number of exchanges necessary to solve the puzzle is even. The 14-15 puzzle attracted a world wide attention that can only be compared with the Rubik’s Cube that conquered the world 100 years later. Ernö Rubik was in fact inspired by the slide puzzle when he designed his famous cube which can be seen as a 3 dimensional version of a slide puzzle.”

The End


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