(;GM[1]FF[4]SZ[19]
GN[Black plays at 'c']
PC[http://senseis.xmp.net/?GokyoShumyoSection2Problem26/Attempts]AP[GoWiki:2009]
DT[2009-08-10]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection2Problem26/Attempts

Black plays at 'c']
PL[B]

AB[ba][ea][ha][cb][hb][dc][ec][fc][gc]
AW[da][ia][bb][fb][jb][bc][cc][hc][ic][gd][jd][ce][ee]

;B[gb]C[B1]MN[1]
;W[fa]C[W2]MN[2]
;B[db]C[B3]MN[3]
;W[eb]C[W4]MN[4]

;
)
