go

done

Done

What's up with Zoor?

Difficulty score 30. Cross hatching and region intersection analysis required to solve this one.

done - easier than yesterday's easy!

Im pretty sure that a lot of the methods you all talkk about, I use, but I have no idea what they are called

cross hatching i can figure out, but i have no idea what region intersection analysis is

ditto... I just go through the same sequnce every time to fill in what I can... I think the 4 things I do first fall into what seems to be called "scanning"

And I think I know what "naked pairs" and "naked triplets" are

I don't... :)

if you use "greens" look for two squares that have only 2 possible numbers, then look at the squares that are in the same row, column or block to see if there is a second square that has the same 2 only possible numbers. I think that is a "naked pair" and triplets are the same, only there are 3 possible numbers

If you find a naked set, then all other squares in that row, column or block cannot be those 2 (or 3) numbers, so you can erase those greens.

go

oh ok, Yeah I do use that too, just never had a name for it

I have no clue about some of the others, even after I go to a site that explains it...like x-wing or y-wing... :-|

I havnt even heard of those

PS: Hi Canada!

http://www.brainbashers.com/sudokuxywing.asp

xy wing is pretty simple if you can find them

That's about when my brain starts leaking out through my nose...

:)

done... take care all & have a good one...

see ya

done

kind of a slow medium

took me 20 minutes or so. not bad :D

btwrt! happy new year

drwho -- guess who's hot and right behind you in ranking??! OK, don't take it personnal; hee, hee! I know you can use your programming skill to get to 600 overnight. overnight.

go

done

go

done

chrissie2006 -- region intersection analysis is a little more general than what UDbmas describes. It is a generalization of the pointing pair and box/line reduction techniques described at scanraid.com.

If you focus on the intersection of a 3x3 block and an line or column, the 3 cells they have in common are significant. If a digit is limited to those 3 square or any 2 of the 3 in the row, then it must be limited to the same 2 or 3 squares in the block and vice-versa.

go

gman -- I hear the sound of hooves and heavy breathing.

go

go

go

go

done :D

6 points away from being in the regulars end of next week if my calculations are right *dances*

Done! Not too awfully difficult.

drwho -- Those hooves you hear are from my Indpls Colts