(;GM[1]FF[4]SZ[19]
GN[An important forcing move]
PC[http://senseis.xmp.net/?BQM469]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM469

An important forcing move]
PL[B]

AB[ec][ed][ee][df][ef][bg][cg][bh]
AW[dc][dd][de][bf][cf][dg][ch][ci]
LB[ce:a][fg:b]

;B[af]C[B8]MN[8]
;W[bd]C[W9]MN[9]
;B[dh]C[B10]MN[10]
;W[eg]C[W11]MN[11]
;B[di]C[B12]MN[12]

;LB[ce:a][fg:b]
)
