(;GM[1]FF[4]SZ[19]
GN[Either a or b]
PC[http://senseis.xmp.net/?SnapbackProblem38/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?SnapbackProblem38/Solution

Either a or b]
PL[B]

AB[ha][db][eb][hb][ac][bc][cc][hc][dd][ed][fd][gd][ce][he]
AW[da][ea][fa][ga][bb][cb][gb][dc][ec][fc][gc]
LB[aa:a][fb:b]

;B[ba]C[B1]MN[1]
;W[ab]C[W2]MN[2]
;B[ca]C[B3]MN[3]

;LB[aa:a][fb:b]
)
