Suppose Black does not play No. 4, E 2, but plays elsewhere, then the following continuation might occur: 7. F 6. 9. J 4. 11. G 3. 13. J 3. 2. F 3. BLACK 4. C 5. This is an alternative method of defending the corner. 6. F 5. Black plays to avoid being shut in the corner, also it can be demonstrated if he neglects this move his stones will be killed. 8. H 4. F 10. H 5. 12. F 2. This is a good move. 4 would be weak. The text move defends and at the same time threatens White's stones on line 3. F 4 would give White a chance to play elsewhere ("Tenuki") which is a great advantage. 14. E 5. Black cannot neglect this move, or White can break in with a winning attack. Again Black has the better of it. He has a chance to |