It seems I missed a couple of replies here.
Not from Austria or Holland.
This puzzle cames from a source used before for several puzzles and I know some of you knows it.
There is no lock, but just a request to keep it alive for a while.
I know you know it, Wendax, because some of your puzzles came from there: to give you a go equals to end it here.
Nicanary, if you don't know it, there's no harm in playing.
This new 'plus 400 points' matter is just about that and for my puzzles, I do not set it as a rule but as a gentleman's agreement.