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Prison Challenge (Posted on 2007-02-05) Difficulty: 3 of 5
In a top security prison, BigBang, there is a tradition that any inmate can obtain freedom by passing through a 100m-long corridor without being caught by a blind guard. The corridor has nine 10m-long perpendicular branches on one side at every 10m and is so narrow, that only one person can pass at a time.

The inmate and the guard start walking toward each other from the opposite ends of the corridor at the same time. The guard may decide to check any of the side branches. The only rule is that the inmate has to maintain the same speed as the guard's at every moment.

Is it possible to get lucky and escape from BigBang?

Prisoner _|_|_|_|_|_|_|_|_|_ Guard

No Solution Yet Submitted by Art M    
Rating: 3.6667 (3 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solutionhoodat2007-02-06 15:11:46
re: Equal pacing, always forwardbrianjn2007-02-05 22:23:40
Equal pacing, always forwardbrianjn2007-02-05 22:08:33
A step in the right directionGamer2007-02-05 18:55:45
Trivial SolutionJoe2007-02-05 17:42:36
Some Thoughtsre: solution -- an objectionFederico Kereki2007-02-05 15:25:14
SolutionsolutionCharlie2007-02-05 14:35:14
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