(;GM[1]FF[4]SZ[19]
GN[Follow-up]
PC[http://senseis.xmp.net/?GOInvasionEtReduction]AP[GoWiki:2009]
DT[2013-04-15]
C[Diagram from http://senseis.xmp.net/?GOInvasionEtReduction

Follow-up]
PL[B]

AB[mc][pd][cf][df][ci][ql][om][po][jp][pp][fq][pq]
AW[jc][dd][fd][ce][ck][dn][qn][rn][dp][qp][hq][qq]
CR[hq]

;B[hp]C[B1]MN[1]
;W[iq]C[W2]MN[2]
;B[ip]C[B3]MN[3]
;W[jq]C[W4]MN[4]
;B[kq]C[B5]MN[5]
;W[kr]C[W6]MN[6]

;CR[hq]
)
