5krunner wrote:Can someone help me with the next step on this puzzle ... I'm stuck. Thx!!!

You've messed up somewhere and we can't see because you didn't post the original puzzle.

You cannot proceed from what you posted and reach a solution.

Mac

Proof:

Cell r1c6 must be a 9, no other candidate fits there. That leads to box 2

329

546

187

Now r4c5 must be a 9. That leads to box 5

491

872

635

Now r5c1 must be a 9. That leads to box 4

863

954

721

All forced placements, right?

Well then we are here:

- Code: Select all
`578 329 -1-`

312 546 879

--9 187 -52

863 491 7-5

954 872 16-

721 635 ---

185 263 947

-36 75- 281

--7 -1- 536

Note there is no way we can place a 9 in row 8.

Solution: Start over.