(;GM[1]FF[4]SZ[19]
GN[Main line]
PC[http://senseis.xmp.net/?posting=290]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?posting=290

Main line]
PL[W]

AB[ca][cb][cc][ad][bd][cd]
AW[da][db][dc][dd][ae][be][ce][de]
CR[ca][cb][cc][ad][bd][cd]
LB[aa:b][ac:a]

;W[bb]C[W1]MN[1]
;B[ab]C[B2]MN[2]
;W[ba]C[W3]MN[3]
;B[bc]C[B4]MN[4]

;CR[ca][cb][cc][ad][bd][cd]
LB[aa:b][ac:a]
)
