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A dozen Knights (Posted on 2004-05-05) Difficulty: 3 of 5
After removing the four corner squares of a chessboard, is it possible to place a dozen knights on the remaining board so the sixty squares are under attack?

  Submitted by Federico Kereki    
Rating: 3.0000 (2 votes)
Solution: (Hide)
If you set six knights on white squares so they attack all thirty black squares, you can invert that solution and find where to place six knights on black squares.

A possible solution is d3, f3, b5, b7 (or c6), f5, and d7, and by symmetry you get solutions for the full problem.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
No SubjectGenevieve2004-09-29 13:53:03
SolutionAsymmetrical solutione.g.2004-05-07 11:50:25
Some Thoughtssome thoughtsRabbi Kanobi2004-05-05 14:14:32
Some Thoughtssilly questions get silly answersAdy TZIDON2004-05-05 11:24:33
Solutionummm...Thalamus2004-05-05 11:03:46
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