(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?RTGProblem50/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?RTGProblem50/Solution

Solution]
PL[B]

AB[ea][eb][ec][dd][ae][be][ce][de]
AW[cb][db][ac][bd][cd]

;B[dc]C[B1]MN[1]
;W[cc]C[W2]MN[2]
;B[bb]C[B3]MN[3]
;W[ba]C[W4]MN[4]
;B[ab]C[B5]MN[5]
;W[da]C[W6]MN[6]
;B[ad]C[B7]MN[7]

;
)
