(;GM[1]FF[4]SZ[19]
GN[Big ko]
PC[http://senseis.xmp.net/?HeavyKo]AP[GoWiki:2009]
DT[2014-07-11]
C[Diagram from http://senseis.xmp.net/?HeavyKo

Big ko]
PL[B]

AB[kb][pb][fc][lc][pc][id][ld][pd][le][mf][mg][qg][mj][pj][jo][ko][hp][jp][lp][np][op][qp][fq][gq][hq][iq][lq]
AW[jb][lb][nb][mc][oc][dd][fe][me][ne][if][lf][og][dj][dn][in][jn][kn][on][go][ho][lo][mo][dp][gp][ip][jq][nq]
LB[ka:a]

;B[la]C[B1]MN[1]
;W[ma]C[W2]MN[2]
;B[mb]C[B3]MN[3]

;LB[ka:a]
)
