Lucky

The aim of the game / sweepstakes, open allthe squares labeled "Yes"
In each horizontal pair of squares one contains "Yes" and one "No", if you open a box with the word "No", you lose.
At first glance, it 's easy enough, but this is not, open the seven squares can 60% of the players, 9 squares open no more than 15%, and only 2% - 3% of the lucky ones open all.
You think you lucky ? then test your intuition and luck, unlock all 10 squares.