(;GM[1]FF[4]SZ[19]
GN[May be the best result for black]
PC[http://senseis.xmp.net/?Twirl/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?Twirl/Solution

May be the best result for black]
PL[B]

AB[bb][eb][fb][bc][cc][ec][gc][hc][dd][fd][de][ee][cf][ci]
AW[ba][ca][ea][fa][cb][db][gb][dc][bd][cd]

;B[hb]C[B1]MN[1]
;W[ab]C[W2]MN[2]
;B[ga]C[B3]MN[3]
;W[ac]C[W4]MN[4]
;B[da]C[B5]MN[5]

;
)
