This may prevent the placing of a stone on an open space. The number of empty points he has completely surrounded to the number of points the stones are placed on is how you get the score for the game. A point that is completely surrounded is counted as the players territory. You don't count the points that have not been completely surrounded. This is done only if two games were not played with alternate turns of being the black stone.
Same thing is done to black.
It has no chance for survival since the opponent can play on it and capture your group or you can play on it and commit suicide. White is doomed. Black can capture it at any time. If there are two eyes remaining for white then black may play on one of the eyes, the white group still has an eye and the black stones are captured. The point circled in red is a very crucial situation.