Usually , white can respond with 1 to block the black with invading the corner because on one hand black can easily make two eyes in a corner and on the other hand , the corner can be easily secured with one move . White will then move at 3 to ensure eye space . Until 6 , the whole black group is full of live and is not easily killed .

If white play at 1 as in , then black play at 2 with a knight's extension . the two black stones cannot be cut as shown in the diagram . Until 12 , black is alive with two eyes . note: The numbers refer to the move of seeds as shown in the diagrams. top