Sudoku Puzzles

Good morning.

Good morning to all! Is that one of Nal's pictures?

and im out of here

is this water cold?

7:50 not too hard today. That water looks very wet

I don't know about wet, but that water is incredibly GREEN!

4:53

23:47

Come back Anne, all is forgiven!

A proof for tough!! sudoku of 12 24 06:
1) Start at 23 filled - the given puzzle. Unique Possibilities to 26 filled. (UP 26).
2) Locked 1's at bc4 forbids i4=1 UP 31
3) i6=1 == i6=8 -- a6=8 == a6=6 -- f6=6 == f3=6 -- i3=6 == i8=6 forbids i8=1 UP 33
4a) d6=3 == f6=3 -- f6=6 == e5=6 -- More...

2hrs 32min -my first puzzle

we have another name for this style of bird
a _ _ it hawk for the mess they make

The blog has another new page! Feel free to drop by.

As a great coincidence, the hard puzzle for today is quickly unlocked using the tip introduced in today's blog. See Unique Rectangles at the upper right corner of this page!

Cool pic and fitting title. First TOUGH I have attempted. Feel a bit like a Dodo because of mistakes. maeN all.

To john and Spur, don't worry if this is your first tough, they are all not this hard, after steve's proof I went and did it again, I must have made a mistake the first time. I can't do that time again.

Small steps for cold water........

I'll just test the water. Hope it's not too cold.'

Merry Christmas all .

After Steve's up 31: locked 47 at gh5- up 81

Hi Gaby!
Hmmm.... How did you eliminate the 4's from e5,g6, h6?

Before I post a proof, I run a thorough check for easy techniques that I may have missed. It would be very rare that a proof posted by me on the tough page would miss either a pair, or a hidden pair. I doubt that is the case with today's puzzle.

Regarding proofs:
I absolutely love to be upstaged by a better proof than mine.

I generally read all the proofs posted, regardless of choice of nomenclature.

If, however, a proof seems inconsistent to me,
I will ask a question about it.

31 mts.

Nov. 5, 2007.

SE=7.3

alternative w/o kraken UP=31
1.(9=235)f279-(3)f6=(3-4)d6=d3-c3=('48)c79 => c7<>9
2.(9=3)d1-d6=(3-6)f6=f3 => f3<>9 UP=41
3.(4=7)g9-h8=(7-4)h5=SF(4)beg259 => g67<>4 UP=54
4.(6=3)f3-d1=('13)ce1 => e1<>6 STE.