(;GM[1]FF[4]SZ[19]
GN[A really bad black mistake - so Black can't cut]
PC[http://senseis.xmp.net/?BeginnerExercise70/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise70/Solution

A really bad black mistake - so Black can't cut]
PL[W]

AB[bb][fb][ec][gc][bd][ed][gd][ce][fe][cf][df][ef][ff]
AW[db][hb][dc][hc][dd][fd][hd][de][ee][ge][he]

;W[fa]C[W1]MN[1]
;B[eb]C[B2]MN[2]
;W[ea]C[W3]MN[3]
;B[ga]C[B4]MN[4]
;W[da]C[W5]MN[5]
;B[gb]C[B6]MN[6]
;W[ha]C[W7]MN[7]

;
)
