Pat wrote:JeJ wrote:with the placement you obtain in r4c6

you can later find the next clue a W-wing

okay my phrasing was a bit too strong

- the path in my first post

uses an implication-stream of 5 cells;

- your way (solving r4c6 first)

reduces this to an implication-stream of only 4 cells

I still don't see a problem with the method I mentioned, since after the W-wing, you can proceed and find the next clue, an XY-chain and crack the whole puzzle.

QiGuy wrote:Some of the techniques described in this thread I'm not familiar with (W wings, skyscrapers), so I'm no further ahead in trying to figure this puzzle out. Is there a consensus among you as to how to proceed from where I am? I have an understanding of basic techniques, X, XY wings, uniqueness principles, but I don't know where to go from where I am in this puzzle.

Also, I have difficulty with this notation: "Using Uniqueness : avoidance 267r257c56 =>3r7c5=6r5c4

3r7c5=6r5c4-(6=9)r9c4-r9c6=r1c6-(9=4)r1c3-(4=13)r8c13-3r8c5=3r7c5 =>r7c5=3 ste" aran. Is there a standard form of notation that I can refer to in order to translate and understand the suggestion?

Thanks -- this site is great, by the way.

Some puzzles can't be solved with the most basic techniques, so if you don't use some more advanced ones (like the ones mentioned here), you won't be able to solve some puzzles.