(;GM[1]FF[4]SZ[19]
GN[variation 2a: refutation ?]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem89/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem89/Attempts

variation 2a: refutation ?]
PL[W]

AB[eb][fb][bc][cc][dc][cd][dd][ed][de]
AW[db][gb][ec][fc][hc][bd][fd][ce][ee][fe][cf][df][ch]
LB[da:a][be:b]

;W[ac]C[W1]MN[1]
;B[cb]C[B2]MN[2]
;W[ab]C[W3]MN[3]
;B[bb]C[B4]MN[4]

;LB[da:a][be:b]
)
