(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?KyuExercise145/Solution]AP[GoWiki:2009]
DT[2009-12-06]
C[Diagram from http://senseis.xmp.net/?KyuExercise145/Solution

Solution]
PL[B]

AB[fo][go][ho][io][jo][ep][ip][kp][lp][eq][kq][mq][nq][oq][fr][or][fs][gs][os]
AW[gp][hp][jp][gq][iq][jq][lq][gr][kr][lr][mr][nr][hs]
LB[is:a]

;B[ir]C[B1]MN[1]
;W[hr]C[W2]MN[2]
;B[jr]C[B3]MN[3]
;W[hq]C[W4]MN[4]
;B[ns]C[B5]MN[5]
;W[js]C[W6]MN[6]
;B[ms]C[B7]MN[7]

;LB[is:a]
)
