At Fault Coverage (Posted on 2007-03-22)

	Submitted by Brian Smith
Rating: 2.0000 (1 votes)
Solution:	(Hide)
There are 10 possible fault lines in a 6x6 square. If there are no fault lines, each potential fault line must have an even number of dominoes straddling it. Since only 18 dominoes are used to cover a 6x6 square and 20 are needed to straddle all the fault lines, there must be a fault line somewhere in the 6x6 square. Joel provides a similar solution here.

	Subject	Author	Date
	re: A counting solution	Steve Herman	2007-03-23 22:43:06
	program for the list	Charlie	2007-03-23 11:32:10
	...through the most grievous faults	Charlie	2007-03-23 11:29:02
	re: all the faults	Charlie	2007-03-23 11:27:21
	all the faults	Charlie	2007-03-23 11:25:31
	re: A counting solution	Jer	2007-03-23 10:46:44
	A counting solution	Joel	2007-03-23 03:26:26
	re: brute force	Charlie	2007-03-22 22:07:09
	brute force	Charlie	2007-03-22 21:57:05