(;GM[1]FF[4]SZ[19]
GN[W7 is a snapback]
PC[http://senseis.xmp.net/?RTGProblem27/Solution]AP[GoWiki:2009]
DT[2011-06-07]
C[Diagram from http://senseis.xmp.net/?RTGProblem27/Solution

W7 is a snapback]
PL[W]

AB[ba][eb][fb][bc][cc][dc]
AW[ga][gb][ec][fc][gc][ad][bd][cd][dd]

;W[ab]C[W1]MN[1]
;B[bb]C[B2]MN[2]
;W[db]C[W3]MN[3]
;B[da]C[B4]MN[4]
;W[cb]C[W5]MN[5]
;B[ac]C[B6]MN[6]
;W[ea]C[W7]MN[7]

;
)
