dailysudoku.com

Asellus: I'm not sure what nice idea it is I am accused of dissolving.
When I read Keith's stuff about M-wings etc., I understood it all apart from half-M-wings. (In fact at first I guessed that it m ...

Thanks Asellus. I do get all that, tho' I'll confess to a little disappointment (not your fault of course) at the apparent dissolving of what seems a nice idea. Have a look at another 'half-M-wing' i ...

Guess you two have said it all!

Victor wrote:
Sorry, Keith, but I think that particular example is not the best you could have for a half-M-wing, ...

Sorry again, Keith! I think it probably is an OK example. It's just that I ...

'Basics' solve most cells. To finish there are probably lots of ways. I used remote pairs of 57s.

Here's another way to look at Norm's 78s. It's a 3-step colouring chain in 8s from one #78 to the other via the 58s. So one of them must be 8 and the other must be 7. So they behave exactly like 'r ...

I realised, after I'd written, what was going on. Sorry, Keith, but I think that particular example is not the best you could have for a half-M-wing, the reason being that you can, as I explained, se ...

Looked hopefully at the identical pairs. I think all three 89s are what Keith calls 'complementary' - all 8s or all 9s. And the 28s are all related. But I couldn't see anything useful to do with thi ...

Paladin, thanks for the thanks! Maybe worth reading Nataraj's comments in http://www.dailysudoku.com/sudoku/forums/viewtopic.php?t=2527&sid=f0d5432b811e95d057aa15ae00c0fa21

I'll repeat more or ...

Thanks folks. The half-M-wing first. Here's that thread again:
+----------------+----------------+
| 247 34A 8 | 347B 16 29 |
| 6 5 1-37 | 37 18 29 |
| 24 9 13D | 34C ...

Nice puzzle
+--------------+---------------+--------------+
| 3 4578 457 | 6 9 458 | 478 2 1 |
| 2 4578 6 | 58 1458 1458 | 3 78 9 |
| 148 9 14 | 7 3 2 | 48 6 ...

George: a w-wing 34 in boxes 5 and 6 Yep, or a 45 w-wing in rows 4 & 5.
Or a type 1 UR in r56 in 29s.
Or XY-wing - the one I see is pivoted on r4c1.
Many choices in a fairly straightforward pu ...

thanks Keith. - echoed.

I think I understand half-M-wings, but I'm not sure. If you're feeling kind, or in didactic mood, I'd be grateful for a brief explanation.

Thanks Steve, lucid and concise as ever! I do get that but, since I missed this one, life is such that I may well never see another. (I noted your recent remark that these things are rare.)

Hi, welcome. Your grid didn't display properly by the way. (I'll leave somebody who's more into that stuff than me to explain why.) Here it is again.
+------------+------------------+------------- ...

OK, I've been doing some homework, looking up some old threads about DPs. Now, I understand the principle behind BUG-lites (which isn't to say that I could find them), such as the two posted by Myth ...

Yep, Nataraj, sounds good, except perhaps for:. . . but I think the elimination will still work if the first link is weak and the second link is strong.This kind of stuff needs EVERY link to be conjug ...

Hmm - Sorry, I don't think your colouring is valid. True colouring chains require a conjugate (strong) link each time, but your second move from r8c7 to r8c1 isn't, for there are three 8s in the row. ...

Thanks folks, that's all very impressive, and very interesting. Like Norm I'd value a reference or two to MUGs.

Ravel is one of my gurus, but I think it was Keith who publicised M-wings (tho' maybe that was after Ravel had mentioned the idea - I don't know):
http://www.dailysudoku.com/sudoku/forums/viewtopic.p ...