(;GM[1]FF[4]SZ[19]
GN[This seems to be the basic idea:]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem61/Attempts]AP[GoWiki:2009]
DT[2011-01-05]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem61/Attempts

This seems to be the basic idea:]
PL[W]

AB[ja][pa][ib][kb][ob][ic][nc][id][md][ie][ne][jf][lg][ng][oh]
AW[jb][pb][rb][jc][kc][lc][pc][jd][ld][pd][ke][le]

;W[ka]C[W1]MN[1]
;B[la]C[B2]MN[2]
;W[lb]C[W3]MN[3]
;W[ma]C[W5]MN[5]
;B[ia]C[B6]MN[6]
;W[nb]C[W7]MN[7]
;B[oc]C[B8]MN[8]
;W[oa]C[W9]MN[9]

;
)
