(;GM[1]FF[4]SZ[19]
GN[Main line.]
PC[http://senseis.xmp.net/?BeginnerExercise255/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise255/Solution

Main line.]
PL[B]

AB[ip][jp][kp][iq][kq][jr]
AW[ho][io][jo][ko][lo][fq][gq][hq][lq][mq][nq]
LB[ks:b][ms:a]

;W[hr]C[W2]MN[2]
;B[lr]C[B3]MN[3]
;W[mr]C[W4]MN[4]
;B[ls]C[B5]MN[5]

;LB[ks:b][ms:a]
)
