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3 in a row = bad (Posted on 2006-04-26) Difficulty: 4 of 5
For n=3,4,5,6,7,8 find:

a) The minimum number of counters that need be placed on a nxn chessboard such that no additional counters can be placed without creating any straight line of 3;

b) The maximum number of counters that can be placed on a nxn chessboard such that no three lie in a straight line.

Remember that positions like A1, B3, and C5 are in a straight line.
(Try to continue the sequences if you can)

See The Solution Submitted by Jer    
Rating: 4.5000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Some Thoughtsre: so far...Dej Mar2006-04-28 04:23:40
so far...Josh2006-04-28 01:47:11
Some ThoughtsAdjusted (Possible) Minimums and MaximumsDej Mar2006-04-27 21:41:39
re(2): Minimum and MaximumDej Mar2006-04-27 18:16:31
re(2): Minimum and Maximumtomarken2006-04-27 14:13:28
re: Minimum and MaximumJer2006-04-27 13:23:57
Some ThoughtsMinimum and MaximumDej Mar2006-04-27 05:43:04
Some Thoughtsre(2): Possible minimum?Dej Mar2006-04-26 18:30:38
Some Thoughtsre: Possible minimum?Dej Mar2006-04-26 18:07:54
Some Thoughtsre: Possible minimum?tomarken2006-04-26 16:43:35
Some ThoughtsPossible minimum?tomarken2006-04-26 14:41:35
Some Thoughtsn=3Rollercoaster2006-04-26 14:34:14
Some Thoughtsinitial reactionRollercoaster2006-04-26 14:19:45
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