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#1: Teresa K (fasstar) on Aug 18, 2009 [HINT]

The dancer is stretching her leg. I am stretching edge logic. Or maybe it's "either-or" logic. Take a look at the image of the puzzle where I got stuck:

http://come-over.to/Play/PBN/Attitude.jpg

Look at R5C10. If that one is white, then the 9 in R5 will interfere with R4. So R5C10 is black. Then do the same thing with R5C9.

Now look at the area of unmarked squares on the right side in the middle. All those twos are either blocks or zig zag. It's easy to see that blocks won't fit, so must be zigzag. If you mentally start the zigzag from R7C20, you will see a conflict with R10C18. So it must zigzag the other way. Then it finishes easily with line logic.

Here is another way to tackle the last part of the puzzle. Once you fill in R5C10 and R5C9 as black, then solve more of the puzzle with line logic. When you are stuck again, look at R6C16. You will have to fill in either R5C16 or R7C16. If R5C16 is filled in, then R5C17 will be filled in. If R7C16 is filled in, then R7C17 will be filled in. Since either R5C17 or R7C17 HAS to be filled in, R9C17 and R10C17 have to be blanks. The rest will solve out normally.

fun!

Wooowwww... that was one of the hardest yet.

Teresa, your hint did not work for me. I guess my brain is just not yet conditioned to hold that in short term memory. Gator's hint worked, though (eventually, after some pondering). I had to do more 2-way logic in the upper left corner. I'd say this stretches the boundaries of both 2-way and edge logic, for sure! I decided to mark it as logically solvable, though. Wouldn't want to be inconsistent, considering my last puzzle... ;)

tough but fun. nice image.

Thanks, Gator. Your way makes sense too, and might be easier. That was fun for me to create something really challenging for you guys. Hehehe.

Lots of these puzzles are really challenging for me, Teresa. =) I'm better at creating hard puzzles than solving them. I think I'm less likely to give up on my own creations while test-solving.

LOL @ #4. Tough one.

I must have missed some opportunity somewhere, because it solved nice and easy for me. Oops, my bad.

From the position posted by Teresa, I proceeded by using "internal" edge logic starting at R5C19 and working my way left. Nice challenge.

Very graceful image. Nice solve. I am not sure if I used logic or guessing. The step downs are often easy to spot when they are even - especially when done in twos ending in one.

Thanks, Paul and BlackCat.

Found to be logically solvable by jan.

Very nice picture!

Thanks, Sarah.

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This one got a 5 on quality from me, excellent puzzle, hard to work at, fun image. Thanks.

Thanks, Jota!

WOW - this was tough! excellent image.

Lovely picture--for a while I thought it was going to be a startled chicken

Thanks, Jill.

I solved it a bit differently - I used edge logic to make the other end of r5 white, and then I used summing in the lower section:

After LL
EL 9 r5 = c18-19 white
LL
Summing r7-10 vs c17-20:
The right side of r7-10 must hold 8 black pixels, but the vertical clues in c17-20 can only fit seven. Therefore the eighth pixel must be in r7c16.
LL to finish

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