Zen Sweeper: Arrange the stones with Feng Shui

The rules of the game resemble Minesweeper in Zen style.
Your task is to open all empty cells and put the stones to the cells with Yin-Yang symbol (You should put a stone before open the cell). However, unlike Minesweeper, the game does not end on the first mistake, but you will get penalty. Wrongly placed stones can't be removed, you also will get penalty for them.