(;GM[1]FF[4]SZ[19]
GN[first idea.]
PC[http://senseis.xmp.net/?KyuExercise50/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise50/Attempts

first idea.]
PL[B]

AB[ob][ec][fc][gc][hc][mc][nc][oc][ed][jd][ld][ee][je][ff][jf][lf][fg][gg][hh][ih]
AW[kb][lb][mb][nb][ic][fd][gd][hd][id][fe][gf][hf][hg]

;B[jb]C[B1]MN[1]
;W[ib]C[W2]MN[2]
;B[jc]C[B3]MN[3]
;W[ja]C[W4]MN[4]
;B[ka]C[B5]MN[5]
;W[la]C[W6]MN[6]
;B[na]C[B7]MN[7]

;
)
