(;GM[1]FF[4]SZ[19]
GN[mistake at move 3]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem20/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem20/Attempts

mistake at move 3]
PL[W]

AB[cb][bc][dc][hc][ic][kc][dd][gd][fe]
AW[db][hb][ec][fc][gc]

;W[da]C[W1]MN[1]
;B[fa]C[B2]MN[2]
;W[fb]C[W3]MN[3]
;B[ga]C[B4]MN[4]

;
)
