(;GM[1]FF[4]SZ[19]
GN[White's blunder]
PC[http://senseis.xmp.net/?Seki]AP[GoWiki:2009]
DT[2018-02-17]
C[Diagram from http://senseis.xmp.net/?Seki

White's blunder]
PL[W]

AB[ba][ea][bb][eb][dc][cd][ed][ae][be][de]
AW[da][ab][cb][db][bc][cc][ad][bd]
LB[ca:c]

;W[ac]C[W1]MN[1]

;LB[ca:c]
)
