Kropki failure?
Can you verify if the kropki the tournament has more than one solution?
Being a reviewing me and again exceeded the time limit ...
Sorry!!
This is the answer on another topic in Germen forum:
Question by pitsch called Kropki
These were realy very difficult puzzles to solve in 2 hours.
Now I had time to solve the puzzles of the Sudokucup 2009 without time pressure.
I found that No. 4 (Kropki) has 3 solutions. Can this be?
512683479
517632984
and
572683419
571632984
In addition there is another possibilty to arrange 1 7 and 9 in the first two squares.
Answer
It's necesarry to read the whole rules and to apply it then... I know it can be a problem sometimes, but there is the sentence in English version "dots indicate all the adjacent/neighbouring cells".
So then you can use the inverted rule.
Then in this result 512683479 it has to be a dot between R3C2 = 1 and R3C3 = 2 but there is none.
So it's possible the only solution 572683419.
These Kropki aren't difficult if you use this inverted rule.
Kodyn
Is that what you want to know?
