(;
GM[1]
SZ[19]
AW[dd][dj][dp][nc][kb][ne][pb]
AB[pp][pj][pd][jp][kd][pf][qc]
LB[nc:1][kd:2][ne:3][pf:4][pb:5][qc:6][kb:7]
C[Problem 14. Black to play.  

In this sanren-sei opening, Black makes a high two-space pincer with 2. The joseki to White 7 follows. Where should Black play next ? ]
(;B[ng]
TE[2]
C[Correct Answer.  

Capping with Black 1 is absolutely essential. Black has now transformed his sanren-sei formation into a large-scale moyo. ]
;W[fq]
TR[ng]
C[Black's aim.  

If White doesn't respond to the marked stone but plays 2 at the bottom, ... ]
;B[md]
C[... Black can force with 3, ... ]
;W[nd];B[lg]
LB[jb:A]
C[... then jump to 5. Black can next aim at A. Black's sanren-sei strategy is now a success. <= ]
)
(;B[fq]
C[Failure.  

Clearly, Black 1 is a good point locally, but ... ]
;W[ng]
LB[ph:B][pn:A][fq:1]
C[... White will take the vital point of 2, and Black's stone at the top is drifting in the shadow of White's influence. For the same reason, Black 1 at A is also bad. After 2, White can aim at the invasion at B. <= ]
)
)