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## Knights

 Puzzle ID: #11959 Fun: (2.8) Difficulty: (2.07) Category: Other Submitted By: Mhalun Corrected By: just_moi

What is the maximum number of chess knights that you can place on a chess board so that none of them can attack each other in one move?

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 Mhalun Apr 27, 2003 Please give me your suggestions and comments quisitor Apr 29, 2003 why not 64 white (or 64 black) knights on every square? (user deleted) Apr 29, 2003 Never realized that! Awesome teaser! (user deleted) Apr 29, 2003 quisitor asks an interesting question, but I suppose it is assumed that the knights can attack each other even if they are of the same color. Otherwise trivial answers like "knights could stack one on top of another" or "in a 10x10 board, 100 knights, all of different shades of yellow" abound. Hmm... more interesting is can you prove that that is the maximum number? And as a challenge can you find the minimum number of knights that can be placed on a chess board such that every square is either attacked or occupied by a knight? (use standard rules - you know what I mean - no shades of yellow). kghugs May 15, 2003 this is a boring joke. i don't even get the joke. puzzled_puzzler May 22, 2003 Its not sopposed to be a joke. You probably have the wrong site. (user deleted) May 22, 2003 The solution is 14. I will leave the three placements as an exercise for the reader. krishnan Jun 12, 2003 I think the answer to Anonymous' question is 12 and not 14 as claimed by him. I have a solution with me but I don't want to give it away.

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