start

pause

Done. 1 guess.

back to it

2nd guess

I guessed the 1,5,8 in the top right box. Was that the right approach?

last couple of days it was all URs; now its one guess and URs

done

@meganwh, before you guess you should aim to eliminate as many possible numbers as you can. For example, if you use greens, there will almost certainly be some apparent greens which turn out to be impossible and should be eliminated before you consider guessing. Examine the relationships between the rows, columns and squares. Practice spotting the patterns of numbers which allow you to eliminate one or more of the greens. In time, you may find that you don't need to guess at all for easy and medium puzzles, while in an expert puzzle you may only need to guess one of two possible numbers in a particular cell (although you may sometimes have to use that technique more than once in the same puzzle).

There's a very incomplete UR, top and bottom right boxes. But it still may be exploited. Pretty sure.

Mistake. I meant top and middle right boxes.

done

yes UTH is correct - that unlocks it

Done