I did logically solve this using no greens (and no reds whatever those are). One way that may be easier than employing chain logic is using geometric patterns, at least for this particular puzzle. Spoiler alert! Don't read further unless you want a clue. Boxed numbers must occupy opposite corners of their box pattern, so the same numbers outside the box on common rows and columns can be logically eliminated. Only one number per box works. Two numbers in the same box pattern would mean there was more than one final solution which is impossible; however different box patterns and different numbers can share one side and not violate the two number rule. Also, a box pattern may have one side askew because that number is in confluence with another box pattern. 3 corners can align with another box pattern but only one number can make a perfect box if they overlay. GL.
done. with greens. and 2 good guesses. yeah, pretty much what he said.
LOL. Need a more specific hint? Column B and D Rows 7 and 8 make a box pattern for a particular number. That same number can also only be in Column H Row 8 and 9. The box pattern eliminates Column H Row 8 and makes Column H Row 9 the only possible solution.
and it begins
done. Used greens when I got suck early on. But after getting a couple more added tha way, it wen't pretty easy
Very easy with greens.
Jackt - reds can be used when you want to indicate that a certain number can't be put in a certain square. I find them confusing, but some people find them helpful.
terminate.. no greens
when u say no greens, does that automatically mean no reds also????
done, with greens - got totally stumped for a long while but finally pushed through it!
Catching up: completed June 2009
I hate doing greens for a Hard, but I'm going green now.
Done, no greens. Didn't think I would finish but after lots of staring and a good guess, I completed.
finally knocked off yesterdays expert with a few false starts on the guess front
Did it. Needed greens. But no guess. Two triplets were hard to see. Even those didn't break it open.