(This is a bonus “second” puzzle that is not connected to the usual Monday-Saturday week difficulty. In fact, this is around Sunday Stumper difficulty.)
or solve online (using our beta test of Penpa-Edit tools)
Author/Opus: This is the 6th puzzle from guest contributor David Altizio.
Rules: Variation of Kakuro Rules. One digit must be duplicated and appear exactly twice in each entry (i.e., group of cells connected horizontally or vertically without any black cells between). All other digits must not repeat within an entry.
Difficulty: 5 stars
Time Standards (highlight to view): Grandmaster = 22:30, Master = 37:30, Expert = 1:15:00