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## CHAT LOG for Tuesday, August 6, 2013

12:12 am
WHB

Done
12:14 am
UnikeTheHunter

Did it at last with coloring, no guess. Coloring is about like doing two chains simultaneously, one red chain, one green chain. Eventually -- but you have to be very careful -- one of the colors has a conflict and you can enter all of the non-conflicting colors at once.
5:53 am
tincup

done
11:23 am
GreyDragon

Go!
11:30 am
franebrown

dng
11:33 am
Ed-was_here

Go
11:33 am
GreyDragon

Done.
11:41 am
Ed-was_here

Done
12:29 pm
UnikeTheHunter

EZPZ, never a rest from clicking.
12:57 pm
drwho

Difficulty score 18. No green.
1:05 pm
drwho

Since the subject of coloring came up, here is my idea of how to do it. It only take 1 digit, and either a cell can or cannot be that digit. You construct a chain starting with the assumption that the first cell cannot be the digit. That lead to a logical deduction that another cell must be the digit in question. From that you find a way to infer that a third cell must be the selected digit, and so on. You end the chain with a cell the must be the digit. If there are any cells that can "see" both the starting cell of the chain and the ending cell, then the digit can be eliminated as a possibility in those cells.
1:09 pm
drwho

Oops, the third cell in the chain cannot be the digit. The must be and cannot be condition alternates down the chain starting with cannot be and ending with must be.
1:14 pm
drwho

Since either the first cell in the chain is the digit then none of the cells that can see the first cell can be the digit, or the last cell in the chain must be the digit eliminating all cells that can see the last cell in the chain. So cells that can see both the first and last cells in the chain cannot be the digit in either case.
2:12 pm
Cinna

dng
2:58 pm
helenkeller

go
3:05 pm
helenkeller

done
3:05 pm
helenkeller

I can do it so much faster without the pressure of having to GO!!!
3:26 pm
Andy

Only 475 more puzzles until I am fully caught up! At the rate I'm going, I'll be Elite again in 2017.
3:35 pm
zoomzoom

Done.
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