(;GM[1]FF[4]SZ[19]
GN[Self-capture as ko threat]
PC[http://senseis.xmp.net/?OshiTsubushi]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?OshiTsubushi

Self-capture as ko threat]
PL[B]

AB[ca][bb][cb][bc]
AW[ba][ab][eb][cc][dc][bd][ce]
CR[ba][ab]

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

;CR[ba][ab]
)
