22.04.2022, 19:34
(22.04.2022, 18:55)Sabrar schrieb: Thank you very much for the reply! I am not sure if you will find my intended solution less tedious, please find it below also in white:
The intention to solve box 8 is to figure out the middle of the chain (r8c5) by process of elimination which is possible due to the long chain. 1 and 9 can be quickly discarded, 8 already sees 7 in the column so would require 9 but then the chain would break. 6 and 7 are in the column which also eliminates 5 from the list of possible values. 4 is not possible due to the given digit in the row. 3 sees 6 in the column so requires 2 and 4 to be adjacent, now 2 must be continued with 1 because 3 and 4 are already used up on the other side of the chain but then 1 needs another 2 in the last part of the chain so it breaks. Therefore r8c5 must be a 2 and then the part of the chain leading into box 9 can be figured out and it should resolve the whole thing.
Oh, that's once again very nice really, I totally missed it. Thanks, great puzzle.