(;GM[1]FF[4]SZ[19]
GN[Double ko]
PC[http://senseis.xmp.net/?OD1PMay23Problem/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?OD1PMay23Problem/Solution

Double ko]
PL[B]

AB[qa][qb][qc][rc][qe][rf][sg]
AW[pa][ra][pb][pc][pd][pe][se][pf][qg][rg][rh][sh]
LB[qf:a]

;B[rb]C[B1]MN[1]
;W[rd]C[W2]MN[2]
;B[qd]C[B3]MN[3]
;W[sc]C[W4]MN[4]
;B[re]C[B5]MN[5]
;W[sb]C[W6]MN[6]
;B[sd]C[B7]MN[7]

;LB[qf:a]
)
