18.09.2019, 16:44
A bit of a pedantic question, but last year I didn't ask a pedantic question I thought of, and then people started writing negative numbers in their Sandglass puzzles and got away with it 
4.4 Hidden Skyscrapers Sudoku:
I assume the rules want to express "All possible arrows are given"? The way it is written know you could take a cell with multiple arrows and leave out some, but not all of them.
4.4 Hidden Skyscrapers Sudoku:
I assume the rules want to express "All possible arrows are given"? The way it is written know you could take a cell with multiple arrows and leave out some, but not all of them.