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#1: Nancy (nbarsi) on Mar 2, 2012

Quite logical fun solve.

Another good one

Comment Suppressed:Click below to view spoilers

(Always with line logic between each move.) After the red and black are solved, edge logic on the left and right 4 clues in row 18 will make R18C1-R18C2 and R18C19-R18C20 dots.

Now that row 18 is more constrained, we can work on some edge logic in row 20 seeing how this affects row 18. If the 6 clue is all the way left or right, row 18 will be invalid. So R20C5 and R20C16 must be dots. Likewise for the same reason R20C6 and R20C15 will be dots.

Edge logic with the 3 clue in row 17 will dot R17C1-R17C2 and R17C19-R17C20.

Now look at the 6 clue in column 1. If it goes in R3C1-R8C1, looking 1 move ahead, R4C3 will be green, 2 moves ahead, R10C3 is also green making column 3 invalid. The same thing happens when starting at row 4, so R1C3-R1C4 are dots. The same logic can be done on column 20.

I then used edge logic on the 10 clue in column 2 to make R1C2-R2C2 dots (same logic on other side makes R1C19-R2C19 dots).

To finish this I have to look 3 moves ahead (even though the solution is obvious to my human eyes), so I have to mark this one as guessing.

Found to be logically solvable by gator.

Found to require some guessing by gator.

Comment Suppressed:Click below to view spoilers

yep, I'll change this one to deep lookahead. I used summing, to suss out those strings of 2s in the green (6 in the middle, with a 4 on either side), or "thick smile logic." :)

Found to be solvable with deep lookahead by kristen.

I'm sure we have quite a few puzzles out there that could be reclassified as deep lookahead instead of guessing. :)

Yep! I've caught a few, but I'm sure there are many more. I'm currently working my way through the puzzle list, starting from the beginning. I'm still in the 3000s, I think. :)

Wow!!!

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