(;GM[1]FF[4]SZ[19]
GN[Reduce]
PC[https://senseis.xmp.net/?RTGProblem102/Attempts]AP[GoWiki:2009]
DT[2020-06-04]
C[Diagram from https://senseis.xmp.net/?RTGProblem102/Attempts

Reduce]
PL[B]

AB[db][dc][dd][ce][cf][bg][cg]
AW[bb][cc][cd][be][bf]

;B[af]C[B1]MN[1]
;W[ad]C[W2]MN[2]
;B[cb]C[B3]MN[3]
;W[bc]C[W4]MN[4]

;
)
