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#1: Josh Greifer (joshgreifer) on Apr 9, 2010 [HINT]

To solve: The 3's can't overlap, and there are 6 of them altogether. So one of them has to start in C1

No guessing or lookahead is required

The way I solved it was..

Compare the possibilities for C17. Since all the clues in R2-R7 end with a '3', the '2' in C17 only has one possible place, R1C16 and R2C16. This allows you to solve C16-C18 and repeat the same logic for the '2' in C14, C11, C8 etc..

Fun puzzle, Josh.

good puzzle, i think logic does it w/o guessing

Same as ant, with the alteration that c16 is actually c17. (I've done that, too.)

Edge logic with the 3's until you can put the 3 in row 2 on the far right, then the rest of the puzzle follows the same logic.

Found to be logically solvable by jan.

I really enjoyed the logic involved in solving this - thanks!

I think this puzzle may indirectly support what Teresa and I have been calling zig zag logic, though this is not a true zig zag.

Looking at the clues, you know the solution has to be a diagonal of some sort. The trick is to figure out which corner is starts at. It can't start at the upper left because the 2 in the fifth column won't work.

neat variation on diagonal (zig-zag) logic

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This is a really nice bit of outside-the-box logic.

I went with ant's solution, since the 3's on the right seem to allow for something like edge logic.

But Josh's solution is a really neat conceptual leap I don't remember seeing in any other puzzle.

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