"Hello! Nice to meet you.
I have 100 doors. Behind 10 doors are surprises. You have to guess behind which door is a surprise. You can choose only one door. Is behind your door a surprise you can keep it. Select several people the same door the surprise will allocated randomly. Guess no one the right door the surprise will not be allocated. Good luck!"
The contest will end on Saturday, 10th May, 01:00 pm (CET)
The ten prizes:
Spoiler:
Spoiler: