(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem25/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem25/Solution

Main line]
PL[W]

AB[qb][kc][lc][qc][md][pd][qd][ne][oe]
AW[mb][pb][nc][pc][nd]
LB[pa:b][lb:a]

;W[ob]C[W1]MN[1]
;B[od]C[B2]MN[2]
;W[na]C[W3]MN[3]

;LB[pa:b][lb:a]
)
