(;GM[1]FF[4]SZ[5]
GN[Black makes a mistake]
PC[http://senseis.xmp.net/?TerritoryAndAreaScoring]AP[GoWiki:2009]
DT[2014-04-02]
C[Diagram from http://senseis.xmp.net/?TerritoryAndAreaScoring

Black makes a mistake]
PL[B]

AB[aa][ab][bb][cb][bc][ad][bd][be]
AW[da][db][eb][dc][dd][ce][de][ee]

;B[cd]C[B1]MN[1]
;W[ca]C[W2]MN[2]
;B[cc]C[B3]MN[3]
;W[ba]C[W4]MN[4]

;
)
