(;GM[1]FF[4]SZ[19]
GN[Variation]
PC[http://senseis.xmp.net/?DoubleSnapback/Solution4]AP[GoWiki:2009]
DT[2009-06-19]
C[Diagram from http://senseis.xmp.net/?DoubleSnapback/Solution4

Variation]
PL[B]

AB[bn][dn][co][eo][fo][bp][fp][ip][aq][bq][gq][hq][jq][kq][kr][js][ks]
AW[do][cp][dp][ep][cq][eq][fq][iq][ar][br][gr][hr][ir][jr][is]
LB[cr:a][er:b]

;B[fr]C[B1]MN[1]
;W[fs]C[W2]MN[2]
;B[dr]C[B3]MN[3]

;LB[cr:a][er:b]
)
