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5 peaceful rooks (Posted on 2021-12-18) Difficulty: 4 of 5
If 33 rooks are placed on a regular 8 by 8 chessboard there always exists at least one set of 5 rooks (ignore the colour) non-attacking each other.

a. Prove it.
b. What would be the number of rooks given a 10 by 10 chessboard ?

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.5000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
No Subjectpatrick rall2021-12-28 06:53:38
soln (it's deceptively easy)Steven Lord2021-12-28 05:08:54
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