In the following shape, how should black use tesuji to limit white's space around the corner to the greatest extent and make black's external momentum thicker?
Black first, if black 1 first stands on the second line, blocking white, so that the move, although black has achieved a strong momentum on the edge, but white 2 will seize the opportunity, will be long in the third line, get rid of the suppression of black, although white has a breakpoint, (with a difference sign) that is a false breakpoint, black does not dare to break, so that the development of white on the side will be very good, black is not satisfied!
So how can black use tesuji to limit white's space around the corners to the greatest extent and make his external momentum thicker?
In this chess shape, white with a triangle has three breaths, the qi is relatively weak, and is in a hurry to get out of the way, to develop to the side, in this case, to achieve a soft head must be pulled, which is particularly advantageous for black chess.
Therefore, black 1 three-line pull, blocking white, is tesuji!
When black 1 and white 2 climb on the second line, then black 3 will also play and block white!
If white jumps 2, then black 3 will rush, white 4 crosses, then black 5 will jump in the third line, suppress white, white 6 climbs, black 7 three lines long, white 8 continues to climb, black 9 is longer, and so on until black 15 suppresses white, so that white is suppressed in the second line, and white suffers! Black's momentum is very thick, and black is satisfied;
When black 1 is played, white 2 is a strong counterattack against black in the current situation! Black 3 is the same upright, which is the correct way to move, and white 4 turns the second line and expands the eye position, so black 5 can block white. After playing to this extent, white needs to make up the chess in the corner, white 6 points, so that white is live in the corner, and black 7 chooses to jump, so that the black chess has a very thick external potential, and white can also live in the corner, and both black and white are satisfied!
Through the game between black and white, the black chess is a tendon, which thickens the external momentum of black and restricts white to the maximum extent in the corner.