(;GM[1]FF[4]SZ[19:7]
GN[best defense ?]
PC[http://senseis.xmp.net/?GokyoShumyoSection5Problem38/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection5Problem38/Solution

best defense ?]
PL[B]

AB[fb][gb][dc][ec][fc][lc][gd][hd][ld][fe][ie][je][ke]
AW[fa][ga][db][eb][hb][lb][mb][cc][gc][hc][kc][id][jd][kd]

;B[ic]C[B1]MN[1]
;W[ib]C[W2]MN[2]
;B[kb]C[B3]MN[3]
;W[jb]C[W4]MN[4]
;B[jc]C[B5]MN[5]
;W[ka]C[W6]MN[6]

;
)
