(;
GM[1]
SZ[19]
AW[dd][df][dj][cp][eq][rp][rq][qq][pq][nq][mq][qn][lc][le][ob][pb][rb][qa]
AB[jp][mp][op][np][pp][qp][qo][ro][pj][fc][jc][jd][qb][qc][pc][rc][pd][pf]
TR[le][lc][ob][pb][qa][rb]
C[Problem 38. Black to play.  

White's marked stones in the top right are without eyes. How should Black attack them ? ]
(;B[mg]
TE[2]
C[Correct Answer.  

Black should attack with 1 ... ]
;W[kf];B[kh]
C[... and 3, thereby mapping out an enormous moyo below. <= ]
)
(;B[jf]
C[Failure.  

Black 1 ... ]
;W[lg];B[jh]
C[... and 3 drive White in the wrong direction. Black's thickness at the bottom is now neutralised and the space here is so big that White will have no trouble living. <= ]
)
)