(;GM[1]FF[4]SZ[19]
GN[If White plays 4 instead of ''a'']
PC[http://senseis.xmp.net/?DochiYoseTesuji]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?DochiYoseTesuji

If White plays 4 instead of ''a'']
PL[B]

AB[fb][gb][ec][ed][fd][fe][ff][gf][bg][cg][fg][ah][ch][dh][gh][bi][ei][fi]
AW[db][eb][dc][fc][gc][dd][gd][ee][ge][af][bf][cf][ef][ag][dg][eg][gg][eh][fh][gi]
LB[cd:a]

;B[de]C[B1]MN[1]
;W[df]C[W2]MN[2]
;B[bd]C[B3]MN[3]
;W[ce]C[W4]MN[4]
;B[ea]C[B5]MN[5]
;W[da]C[W6]MN[6]
;B[fa]C[B7]MN[7]

;LB[cd:a]
)
