(;GM[1]FF[4]SZ[19:5]
GN[Analysis: collapsing seki. B2 elsewhere]
PC[http://senseis.xmp.net/?AlterIgoEndgameProblems/Problem1Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?AlterIgoEndgameProblems/Problem1Solution

Analysis: collapsing seki. B2 elsewhere]
PL[W]

AB[ca][ab][cb][bc][cc][bd][be]
AW[ba][da][bb][db][dc][cd][dd][ce]

;W[ad]C[W1]MN[1]
;W[ac]C[W3]MN[3]
;B[aa]C[B4]MN[4]

;
)
