perplexus.info :: General : Chess Board Switch

Chess Board Switch (Posted on 2004-02-28)

You have a 4×5 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?

Submitted by Gamer

Rating: 3.6667 (6 votes)

Solution: (Hide)

The best solution so far is 18 moves, as shown here.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
answer	Dej Mar	2018-08-24 18:18:37
answer	K Sengupta	2007-06-28 13:07:36
Thinking Outside of the 4x5 Box	Jak Dakars	2005-06-19 20:37:15
re(3): A switch solution - maybe not the optimal one...	Eric	2004-03-06 12:44:15
re(2): A switch solution - maybe not the optimal one...	slsl	2004-03-02 10:05:48
re(2): A switch solution - maybe not the optimal one...	paurusan	2004-03-02 09:36:39
re: A switch solution - maybe not the optimal one...	Federico Kereki	2004-03-02 07:03:49
A switch solution - maybe not the optimal one...	slsl	2004-03-01 14:18:40
re: Solution1	Charlie	2004-02-29 10:14:44
re: Solution1	ThoughtProvoker	2004-02-29 04:52:32
Solution1	Ariel	2004-02-28 23:21:15
re: No Subject	Penny	2004-02-28 16:06:05
No Subject	Gamer	2004-02-28 14:15:13
First Step	Eric	2004-02-28 12:58:51
First Step	Eric	2004-02-28 12:58:50

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