I've been lurking hereabouts trying to get to grips with advanced techniques and I think I understand up to about jellyfish level...but I may be wrong.

Anyway, I'm really struggling with a puzzle that's been keeping me going on and off for a couple of days now and I'd appreciate some suggestions on how to proceed.

It started here:

- Code: Select all
`.2.|41.|.8.`

...|.5.|9..

1.7|..8|3..

---+---+---

...|5..|.37

.6.|...|.4.

51.|..4|...

---+---+---

..5|3..|2.8

..9|.4.|...

.7.|.25|.9.

and I've got this far, which I think is all correct so far:

- Code: Select all
`92.|41.|.8.`

...|.5.|9..

157|..8|3.4

---+---+---

.9.|5..|.37

76.|...|.4.

51.|..4|...

---+---+---

645|3..|2.8

2.9|.4.|.5.

.71|.25|49.

I solved it in desperation by guessing r9c1 (best of two eventually, after eliminations!), but there must be a logical way to do it.

Buggered if I can find it though!

Help!

Cheers!

Josh.