dailysudoku.com

[crunched]

Wow the vh was the easiest I ever had. Took 10.5 minutes to solve, and I worked without trying to be quick.
I used 1 UR. No wings, and nothing clever---as if I were clever anyway!

[kragzy]

Not as snappy as you Crunchy - took me 20 mins. Two X wings and an XY wing. I avoid looking for URs (just a personal choice). Pretty straightforward all the same.

You must be in Australia or NZ to do the puzzle so early, or are you up very late?

Cheers

[storm_norm]

I really need a vacation or new eyes, something.

[Marty R.]

[storm_norm]

the x-wing and the xy-wing attack the same cell in r9c8, the xy-wing {4,8,9} removes the 8 and the x-wing on 4's removes the 4 leaving a 2.

and that solves it.

thanx marty.

[Johan]

The <48> remote pair (abcd) was the crunching point for me, it deletes <4> and <8> in R9C8

[crunched]

[nataraj]

Maybe it's just the effect of the Italian wine, but the "UR" does not look like a valid UR to me. I think a valid UR must be in two boxes, not in four.

Anyways, I did not take that route, but went the coloring way:

x-wing 8 cols 6 and 9 rmoves 8 from r6c8
kite 8 row 3 col 5 removes 8 from r9c8
xwing 4 cols 5 and 7 makes r9c8=2 and solves the puzzle.


___

edit: oops, I see now that Marty posted the same about UR.

[cgordon]

I spotted this UR before I completed the basics: It stuck out like a sore thumb. But if I take the basics to fruition, I end up with the second grid. Could someone pls explain if the second position is a UR. I don’t see a Deadly Pattern. Is this a case of basics eliminating potential solutions?

Edited Note:
Seems I forgot that URs cannot be in four boxes. Had to be reminded - see below. So I've removed irrelevant grids to avoid further shame and embarrassment.

[stevieboy]

Solved it online in about 3 minutes....the UR that everyone's talking about was the only thing I needed to do, to continue on.

BTW, all that stuff I "rambled" on about a couple of weeks ago (M-Wings, W-Wings, etc)...I don't seem to need to look for these anymore, at least on the puzzles I've been doing; usually, UR, XYZ-Wings, or XY-Wings seem to do the trick.

I do have a question on solving these online, however - when the "auto-sweep" is on, how can we eliminate candidates from cells that (we know) don't belong there? "Shift" or "Ctrl" don't seem to individualize notations in cells. Is there another way to do this, other then USING notations?

I have to visualize cell(s) without candidates that I know, shouldn't be there.

Thanks.

[cgordon]

[Earl]

Coloring in 8's eliminates the 8 in R9C5 and solves the puzzle.
The apparent UR is not valid, even though it works!.

Earl

[cgordon]

Earl said:

[Marty R.]

[cgordon]

[Marty R.]

[cgordon]