(;GM[1]FF[4]SZ[19]
GN[White to live]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem9/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem9/Solution

White to live]
PL[W]

AB[oa][nb][nc][oc][pc][qd][qe][re]
AW[ob][pb][qc][rc][rd]

;W[qa]C[W1]MN[1]
;B[sb]C[B2]MN[2]
;W[rb]C[W3]MN[3]
;B[na]C[B4]MN[4]

;
)
