(;GM[1]FF[4]SZ[19]
GN[161~167]
PC[http://senseis.xmp.net/?IgoHatsuyoRonProblem183/Solution]AP[GoWiki:2009]
DT[2010-06-15]
C[Diagram from http://senseis.xmp.net/?IgoHatsuyoRonProblem183/Solution

161~167]
PL[B]

AB[aa][ea][ia][ja][ma][na][oa][pa][qa][ra][ab][bb][eb][mb][ob][pb][sb][ac][bc][cc][dc][ec][lc][nc][pc][qc][ad][dd][fd][gd][hd][ld][pd][rd][ae][ie][je][ke][le][me][pe][qe][af][bf][cf][df][ef][ff][gf][if][lf][nf][qf][gg][ig][mg][ng][og][ah][ch][eh][gh][ih][ph][qh][rh][sh][ai][ci][ei][gi][ii][li][mi][ni][pi][aj][cj][ej][gj][jj][lj][pj][rj][gk][ik][jk][lk][pk][rk][al][bl][cl][dl][el][fl][gl][il][jl][kl][ml][nl][pl][sl][am][jm][nm][pm][an][bn][cn][dn][en][gn][hn][jn][kn][ln][mn][nn][pn][qn][rn][sn][do][eo][fo][go][ho][so][ap][cp][gp][hp][ip][jp][kp][lp][op][qp][sp][cq][iq][jq][lq][mq][sq][cr][dr][mr][or][rr][sr][bs][gs][is][js][ms][ns][os][ps][qs][rs][ss]
AW[ca][ga][la][cb][gb][hb][ib][kb][lb][qb][rb][ic][jc][kc][mc][oc][rc][sc][bd][id][kd][md][nd][od][sd][be][ce][de][ee][fe][ge][he][ne][oe][re][se][hf][kf][of][pf][rf][ag][bg][cg][dg][eg][fg][hg][kg][lg][pg][qg][rg][sg][fh][hh][kh][oh][bi][di][fi][hi][ji][ki][oi][qi][ri][si][fj][hj][ij][kj][mj][oj][qj][sj][ak][bk][ck][dk][ek][fk][hk][kk][mk][ok][qk][hl][ll][ol][ql][bm][cm][dm][em][fm][gm][hm][im][lm][om][qm][rm][sm][fn][in][on][ao][bo][co][io][jo][ko][lo][mo][no][oo][po][qo][ro][bp][dp][ep][fp][mp][rp][bq][gq][hq][kq][nq][oq][pq][rq][ar][br][er][hr][ir][jr][kr][lr][nr][pr][qr][hs][ls]

;B[cs]C[B161]MN[161]
;W[dq]C[W162]MN[162]
;B[fq]C[B163]MN[163]
;W[eq]C[W164]MN[164]
;B[fr]C[B165]MN[165]
;W[es]C[W166]MN[166]
;B[pp]C[B167]MN[167]

;
)
