(;GM[1]FF[4]SZ[19]
GN[White lives with either a or b]
PC[http://senseis.xmp.net/?posting=10909]AP[GoWiki:2009]
DT[2017-02-21]
C[Diagram from http://senseis.xmp.net/?posting=10909

White lives with either a or b]
PL[B]

AB[hl][dm][em][fm][gm][hm][dn][fn][in][jn][do][jo][cp][jp][cq][dq][eq][jq][er][ir][jr][kr][es][fs][js]
AW[gn][hn][eo][fo][go][io][dp][ep][ip][kp][lp][fq][iq][kq][lq][mq][fr][hr][lr][mr][gs][hs][is]
LB[fp:a][gp:b]

;B[hq]C[B1]MN[1]
;W[hp]C[W2]MN[2]
;B[gr]C[B3]MN[3]
;W[gq]C[W4]MN[4]

;LB[fp:a][gp:b]
)
