(;
GM[1]
SZ[19]
AW[dd][dp][nc]
AB[pp][pj][pd][ld]
LB[lc:A]
TR[ld]
C[Problem 10. White to play.  

Instead of the usual low pincer at A, Black has pincered on the fourth line with the marked stone. How should White respond ? ]
(;W[ne]
LB[nd:A]

TE[2]
C[Correct Answer.  

Black is threatening to shut White out of the center with A. Therefore, jumping to White 1 is essential. ]
;B[pf]
C[After Black 2, ... ]
;W[pb];B[qc];W[lb]
LB[pb:3]
C[... White settles her stones with 3 and 5. <= ]
)
(;W[qc]
C[Failure.  

Invading with 1 may be possible in some positions, but here, with Black's sanren-sei formation in place, it is a bad move. ]
;B[qd];W[pc];B[od];W[oc];B[nd];W[mc];B[md]
C[Up to 8, Black gets a thick wall without any defects. Compare this with the result when Black makes the low pincer, as in the Correct Answer of Problem 2. <= ]
)
)