(;GM[1]FF[4]SZ[19]
GN[Black is trying to capture the marked stones]
PC[http://senseis.xmp.net/?MiddleGameDiscussion2]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?MiddleGameDiscussion2

Black is trying to capture the marked stones]
PL[B]

AB[bb][kb][bc][jc][lc][pc][cd][gd][hd][jd][ce][ee][ie][qe][ef][if][cg][gg][hg][jg][ch][jh][ii][ji][ni][gj][hj][nj][pk][rl][rm][qn][io][qo][ip][kp][kq][nq]
AW[ia][db][hb][jb][cc][hc][ic][dd][ed][fd][id][fe][he][ff][hf][eg][ig][dh][hh][ih][ci][fi][gi][hi][dj][mj][mk][qm][pn][co][po][dp][hp][pp][rp][fq][iq][jq][pq]
CR[mj][mk]
SQ[rp]
LB[ck:b][kn:a][or:a]

;B[nm]C[B1]MN[1]

;CR[mj][mk]
SQ[rp]
LB[ck:b][kn:a][or:a]
)
