dailysudoku.com

RobertRattley · Joined: 24 Jun 2007 Posts: 118 Location: Australia

OK: for once, Australia beats Tanzania.

But I won't spell it out. Just my summary.

One step, xy wing.

I enjoyed this puzzle. I needed intermediate-to-hard steps both before and after the xy wing.

I'll let somebody else reveal a fuller solution and I look forward to seeing what alternatives others may find.

Clement · Posted: Thu Apr 11, 2013 11:04 pm Post subject: Apr 12 VH

RobertRattley,
O.K. Congratulations.

Marty R. · Posted: Fri Apr 12, 2013 1:02 am Post subject:

Same as you Robert, an XY-Wing. What made this puzzle different from most is that there were a lot of numbers in the grid. I screwed up with pencil and paper and had to do it on Draw/Play to see if I had a wrong grid or made a mechanical error. As it turned out I had the right grid but erred on the remaining basics after playing the XY-Wing.

kuskey · Joined: 10 Dec 2008 Posts: 141 Location: Pembroke, NH

A 125 xyz wing contered at r6c1 sets r6c3<>2 yielding a solution after some rather nice cleanup. Some would argue the use of an xyz as a VH tool, I guess.

hughwill · Joined: 05 Apr 2010 Posts: 424 Location: Birmingham UK

These were my basics...they didn't seem to go very far today.....

RobertRattley · Joined: 24 Jun 2007 Posts: 118 Location: Australia

Thanks, Hugh, for posting the grid.

Those were my basics too. And my xy-wing was a 126 with fulcrum box 4 cell 9, pinching box 4 cell 7 on 1. (See! I use a different notation! How perverse of me.)

Good spot, kuskey. I didn't see that xyz wing. And, assuredly, xyz wings do "count" equally. Virtually by definition, a "very hard" puzzle on this site is one that needs, and can be solved by, one or more x-wings, xy-wings or xyz-wings. Not to imply that it's "wrong" to use some other technique - whatever solves the puzzle.

viiiknow · Joined: 13 Apr 2013 Posts: 1

Thank you all. This is one deviously delicious puzzle.