(;GM[1]FF[4]SZ[19]
GN[------------------]
PC[http://senseis.xmp.net/?SnapbackProblem0/Solution]AP[GoWiki:2009]
DT[2014-06-25]
C[Diagram from http://senseis.xmp.net/?SnapbackProblem0/Solution

------------------]
PL[B]

AB[cf][dg][eg][hg][ch][dh][hh][ei][fi][gi][hi]
AW[ef][gf][bg][cg][gg][bh][eh][fh][gh][ci][di]
LB[df:a]

;B[hf]C[B1]MN[1]
;W[bf]C[W2]MN[2]
;B[ff]C[B3]MN[3]

;LB[df:a]
)
