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Back to throne (Posted on 2015-05-21) Difficulty: 2 of 5
Imagine a chess King placed in the central square C(5,5) of a 9x9 “checkerboard”. King’s step consists of his displacement to the neighboring square in one of the 8 directions.

What is the probability that his 4-step random walk terminates at square C?

See The Solution Submitted by Ady TZIDON    
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  Subject Author Date
Some Thoughtsre: One way to solutionSteve Herman2015-05-21 11:00:53
Solutioncomputer exploration and solutionCharlie2015-05-21 10:34:51
SolutionOne way to solutionJer2015-05-21 09:40:07
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