(;GM[1]FF[4]SZ[2:1]
GN[Black sets up ko]
PC[http://senseis.xmp.net/?posting=3069]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?posting=3069

Black sets up ko]
PL[B]


;B[aa]C[B1]MN[1]
;W[ba]C[W2]MN[2]

;
)
