(;GM[1]FF[4]SZ[19]
GN[Plays 171 - 180]
PC[http://senseis.xmp.net/?KoThreatAmplification]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KoThreatAmplification

Plays 171 - 180]
PL[W]

AB[bc][cc][dc][ec][lc][bd][ed][ld][nd][od][pd][rd][fe][ke][me][re][bf][ef][ff][mf][rf][cg][ng][qg][rg][sg][ih][mh][nh][ph][ci][mi][pi][jj][kj][lj][pj][qj][bk][dk][jk][mk][nk][ok][qk][rk][cl][dl][el][fl][hl][dm][gm][om][gn][nn][co][ko][mo][oo][po][qo][ro][cp][dp][ep][fp][jp][rp][bq][dq][gq][hq][jq][kq][qq][gr][hr][ir][kr][lr][mr][nr][pr][ns][qs]
AW[bb][cb][eb][fb][mb][ob][fc][mc][qc][dd][fd][md][qd][ae][be][ce][de][ee][ge][ne][qe][nf][of][qf][og][pg][oh][qh][rh][li][ni][oi][qi][si][mj][nj][rj][gk][hk][kk][lk][bl][il][ml][cm][em][fm][im][km][nm][qm][rm][cn][dn][pn][bo][eo][fo][go][io][jo][no][bp][gp][hp][ip][kp][lp][op][pp][qp][cq][iq][lq][mq][nq][oq][rq][jr][or][rr][is][os][ps]

;W[on]C[W1]MN[1]
;B[np]C[B2]MN[2]
;W[lh]C[W3]MN[3]
;B[mg]C[B4]MN[4]
;W[mn]C[W5]MN[5]
;B[pm]C[B6]MN[6]
;B[ab]C[B8]MN[8]
;W[db]C[W9]MN[9]

;
)
