The Puzzle Robot #21 – Trid
or solve online (using our beta test of Penpa-Edit tools)
Theme: Logical
Rules: Place a digit from 1-7 into each circle so that no digit repeats within any straight line. The clues given inside some triangles represent the sum of the digits in the triangle’s three vertices. Or see here.
Answer String: Enter the digits in the marked lines in the direction of the arrows, separating the two lines with a comma.
Time Standards (highlight to view): Grandmaster = 3:45, Master = 4:45, Expert = 9:30
Solution: PDF
Trid reminds me of Kakuro somewhat, in terms of logical steps needed to solve it. I especially liked the “a-ha” moment with the circle near the center–very clever Serkan!