(;GM[1]FF[4]SZ[19]
GN[White to play (ac)]
PC[http://senseis.xmp.net/?IgoHatsuyoRonProblem173/Attempts]AP[GoWiki:2009]
DT[2014-09-12]
C[Diagram from http://senseis.xmp.net/?IgoHatsuyoRonProblem173/Attempts

White to play (ac)]
PL[W]

AB[mc][od][qd][me][qe][re][jg][ng][qg][oh][ph]
AW[mb][nb][pb][pc][rc][rd][pf][pg][mh][qh][ni][qi][pj]

;W[of]C[W1]MN[1]
;B[nf]C[B2]MN[2]
;W[pd]C[W3]MN[3]
;B[pe]C[B4]MN[4]
;W[oe]C[W5]MN[5]
;B[nd]C[B6]MN[6]
;W[qf]C[W7]MN[7]
;B[rg]C[B8]MN[8]
;W[rf]C[W9]MN[9]
;B[sf]C[B10]MN[10]

;
)
