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#1: bugaboo (bugaboo) on Jan 10, 2011

excellent solve
no guessing
i used edge logic in several places and then 2-way logic to prove row 10/column 4 was a dot (even though i dont think that actually helped much at all
but what let me finish was edge logic on the 2 in row 19

no guessing for me... i'll think about your idea, Brian
cool beard

bugaboo or Tom - could you detail out all of the advanced technique steps that you took to solve this one? I'm having trouble getting to the end on this one (limitation of 2 step look ahead of course). Thanks!

dang double entry...sorry

Gator... i just solved it again with no problem... i did do edge logic for the top 8, then the rest was easy.

Found to be logically solvable by Gator.

Thanks for looking Tom.

I just found a two step look ahead contradiction I did not see before. If R4C16 is black, then two steps later row 7 will be invalid. So R4C16 is a dot. The rest solved easily after that.

There was a ppint when I was sure it was Pavarotti! Looking good Brian. Great puzzle!

I used some advanced edge logic (or whatever the heck it's called) on the placement of the 5 in column 18 to determine that R5 C17 had to be black (because of the placement of the 4 in C17). After that, it fell into place.

glad i could help Gator :)

I agree, edge logic on the 8 in the top row.

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Thank you. I've had the beard since I was 16 back in the mid '70s

Tough to get details in such a small puzzle. Nice job.

After I got stuck (for a long while), I used edge logic on the 2 in r19. R20c4-6 and c8-9 were open and available for the 1 in that row.

The left 1s in r18 & 20 had not yet been placed. No matter where the 2 in r19 went, one of the 2s in c4 or 6 must go down into r20, otherwise there would be a block of 2 in r19. That would be the 1 in r20, so r20c8&9 must be white. The rest then solved easily.

Very good puzzle

Good job; tough puzzle.

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I never noticed that before.

Wow this was tricky... I had to guess one time, couldn't do it without. I saved it and tried to continue several times ;) well I'm not that good yet I guess. Very nice puzzle!!

Although it doesn't look just like me, it certainly represents me very well.

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55 as of last month.

lol @ 18 and 19.

This is a cool idea. I'm not brave enough.

A good challenging solve too. I worked on column 3 a bit with some edge-ish logic to get things rolling once the line logic and top/bottom edge logic ran out.

Now I want a beard!

I have one you can have Jill :)

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