(;GM[1]FF[4]SZ[5]
GN[B5 at W2]
PC[http://senseis.xmp.net/?RetrogradeAnalysisProblem8/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RetrogradeAnalysisProblem8/Attempts

B5 at W2]
PL[B]


;B[ab]C[B1]MN[1]
;W[aa]C[W2]MN[2]
;B[ba]C[B3]MN[3]
;W[db]C[W4]MN[4]
;B[aa]C[B5]MN[5]

;
)
