You are here

Puzzle GP round 4 - Japanese Sums and Loop

Is it possible that the number of patterns for drawing a loop is more than one?

No, only one possible way how to place entire loop.

Is a row or column without clues required to be empty?

In the example, the only row without clues is entirely empty, but the puzzle is unique even without that assumption.

In the competition puzzle, all rows and columns have clues.