(;GM[1]FF[4]SZ[19]
GN[B1 was at B5;  B3-W4 = threat-reply]
PC[http://senseis.xmp.net/?HolIgorExploresYoseProblem1]AP[GoWiki:2009]
DT[2018-10-15]
C[Diagram from http://senseis.xmp.net/?HolIgorExploresYoseProblem1

B1 was at B5;  B3-W4 = threat-reply]
PL[B]

AB[ab][bc][bd][be][ce][de][df][ef]
AW[ca][bb][db][eb][gb][cc][ec][cd][dd][ee][fe]

;W[aa]C[W2]MN[2]
;B[ba]C[B5]MN[5]
;W[cb]C[W6]MN[6]

;
)
