(;GM[1]FF[4]SZ[19]
GN[Common Invasion/reduction sequence]
PC[http://senseis.xmp.net/?BQM221]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM221

Common Invasion/reduction sequence]
PL[W]

AB[jc][dd][cg]

;W[dc]C[W1]MN[1]
;B[ec]C[B2]MN[2]
;W[eb]C[W3]MN[3]
;B[ed]C[B4]MN[4]

;
)
