(;GM[1]FF[4]SZ[19]
GN[Double threat]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem133/Solution]AP[GoWiki:2009]
DT[2023-02-03]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem133/Solution

Double threat]
PL[W]

AB[ld][nd][qd][rd][sd][le][oe][qe][nf][qf][lg][mh][ph][ni][qi][rj][pk]
AW[mc][nc][oc][qc][rc][me][re][rf][ng][pg][qg][rh][qk][pl][ql]

;W[og]C[W1]MN[1]
;B[oi]C[B2]MN[2]
;W[pe]C[W3]MN[3]
;B[od]C[B4]MN[4]
;W[md]C[W5]MN[5]
;B[mf]C[B6]MN[6]
;W[of]C[W7]MN[7]

;
)
