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#1: Stephanie T (laalbacoronada) on Dec 15, 2009 [HINT]

I had to use some fancy edge logic to place the 6 in the bottom row, but no guessing.

Found to be logically solvable by Gator.

Ditto #1. What we have been calling deep edge logic.

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Martin - I call it "deep" because it is looking deeper than 1 row. Like in this puzzle, if we were trying to use edge logic on row 50, we would look to see how this affects row 49 to see if there is a contradiction. We have to look deeper than row 49 to see the contradictions. I'll try to describe in better detail how this works.

Before even solving any of the puzzle, let's just focus on the 6 clue in the bottom row. Also take a look at the 3 rows above the bottom row (rows 47-49) and notice the clues in those rows. Now imagine trying to place the 6 clue on row 50 in columns 1-6. When you look at the bottom column clues (4 7 3 3 3 2), you can see that the 6 clue will cause you to fill in those column clues. But there will also be a dot above each one of these filled in parts.

If you just focus on how row 48 is affected, you will see that the 6 clue causes R48C1 - R48C5 to be black and R48C6 to be a dot. This is a contradiction though as the row clues are 8 11. So we know the 6 clue cannot go all the way to the left in row 50. So R50C1 is a dot. If you take that thought a little further (again looking at how row 48 is affected), you will see that the clue 6 cannot be in 2-7, 3-8, 4-9, or 5-10 as each will cause row 48 to be a contradiction. So R50C2-R50C5 are dots.

You can work the whole part of row 50 finding contradictions on row 48 until there is only one place left that the 6 clue will go.

I'm not sure if this is any clearer. I'll try to get some images posted if I get a chance to later.

Ditto #5.

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I used edge logic at the bottom of columns 2 and 3 (where a 7 in column 2 collides with a shorter block in column 3). That was enough for me to complete the bottom half of the puzzle without further edge logic.

thank you all. and have a wonderful Christmas time.

Thanks for a fantastic entry! Kai!

Yikes, that was a tough one. But nice image, and lots of fun to solve.

I think this is just a nice "Frosty" as "Jack Frost" tends to be a scary monster. :S

Thanks it was fun to solve!

Merry Christmas

Great one. Very fun and great image. Thanks!

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