(;
GM[1]
SZ[19]
AW[ec][dc][cd][bf][nb][nc][qc][pc][md][me][kf][lf][ke][kh][pr][nq][bp][cn][ck][li]
AB[df][ed][fc][gd][je][kd][lc][mc][qd][pd][od][nd][ji][mf][mg][pg][pj][pp][qn][cq][dp][fq]
TR[kh]
C[Problem 131. Black to play.  

How should Black attack after White played the marked stone (White 4 in then Correct Answer of Problem 47) ? ]
;B[lk]
TE[2]
C[Correct Answer.  

Black should cap with 1. ]
;W[jd]
C[White will play 2 ... ]
;B[jc];W[id]
C[... and 4 to get some aji at the top, ... ]
;B[ic];W[if];B[ie];W[jf];B[he];W[ih]
C[... then run away with the sequence to 10. ]
;B[ii]
C[Black forcefully drives White to the left side with 11 ... ]
;W[hh];B[gj];W[fh];B[ej];W[dh];B[cj]
C[... to 17, then, ... ]
;W[ch]
C[... when White links up to the corner with 18, ... ]
;B[bk]
C[... the white stones in the lower left suddenly find themselves in trouble. <= ]
)
)