Permalink Submitted by mstang on Sun, 01/22/2017 - 20:29.

This solution actually does not work because R2C1 and R3C1 have a sum of 10. Notice that "ALL" neighboring digits with sum 10 are marked with X (and respectively sum 5 marked with V).

Permalink Submitted by romanm44 on Sun, 01/22/2017 - 20:34.

In row 1, the 4 and 6 total to 10, but this is not marked as X. Because ALL totals of 5 or 10 are supposed to be marked, this violates the rules of the puzzle.

## This solution actually does

This solution actually does not work because R2C1 and R3C1 have a sum of 10. Notice that "ALL" neighboring digits with sum 10 are marked with X (and respectively sum 5 marked with V).

## In row 1, the 4 and 6 total

In row 1, the 4 and 6 total to 10, but this is not marked as X. Because ALL totals of 5 or 10 are supposed to be marked, this violates the rules of the puzzle.

## Sorry about that - the

Sorry about that - the previous comment appeared only after I typed my answer. :)