(;GM[1]FF[4]SZ[19]
GN[White extension]
PC[http://senseis.xmp.net/?NYR2002Moves1To20]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?NYR2002Moves1To20

White extension]
PL[W]

AB[qm][pq]
AW[po][cp][eq]

;W[kq]C[W1]MN[1]
;B[np]C[B2]MN[2]
;W[on]C[W3]MN[3]
;B[mo]C[B4]MN[4]

;
)
