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Chess Board Switch (Posted on 2004-02-28) Difficulty: 3 of 5
You have a 45 chess board as follows:

You can move the four bishops in any order (not necessarily alternating black and white), provided that no move puts a piece in danger of being captured by a bishop of the opposite color.

What is the fewest number of moves needed for the black and white bishops to exchange places?

See The Solution Submitted by Gamer    
Rating: 3.6667 (6 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts re: A switch solution - maybe not the optimal one... | Comment 9 of 14 |
(In reply to A switch solution - maybe not the optimal one... by slsl)

The numbering is wrong... "a3b2" should be "a2b3", and so on. Also, the two first moves can be switched, and so can the two last moves, so there are four solutions.
  Posted by Federico Kereki on 2004-03-02 07:03:49

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