(;GM[1]FF[4]SZ[19]
GN[Black loses 2 stones]
PC[http://senseis.xmp.net/?GokyoSeimyoVolume3Problem13/Attempts]AP[GoWiki:2009]
DT[2009-07-30]
C[Diagram from http://senseis.xmp.net/?GokyoSeimyoVolume3Problem13/Attempts

Black loses 2 stones]
PL[B]

AB[jb][kb][mb][rb][sb][ic][jc][lc][mc][pc][qc][nd][od]
AW[qa][lb][kc][rc][sc][jd][kd][ld][md][pd][qd][sd][ne][oe][re]

;B[pa]C[B1]MN[1]
;W[oc]C[W2]MN[2]
;B[nc]C[B3]MN[3]
;W[ob]C[W4]MN[4]
;B[qb]C[B5]MN[5]
;W[oa]C[W6]MN[6]
;B[ra]C[B7]MN[7]
;W[pb]C[W8]MN[8]
;B[nb]C[B9]MN[9]

;
)
