I'm really happy with how the opening logic turned out :)
Provided is an example board which meets this constraint for its given 1's:
Lösungscode: Row 5 from left to right followed by column 9 from top to bottom.
am 23. November 2020, 16:04 Uhr von Rosaly
Very nice puzzle, thanks!
am 22. November 2020, 19:38 Uhr von brandon_bot
See the example board provided. In the example, two 1's connect to the same 8 so there is at least one 8 remaining that does not need to be used in a path and therefore is not required to connect to a 7 and 9.