(;GM[1]FF[4]SZ[19]
GN[Best Black play]
PC[http://senseis.xmp.net/?BeginnerExercise199/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise199/Solution

Best Black play]
PL[W]

AB[ca][ga][cb][eb][fb][gb][dc][ec][gc][gd][be][ce][de][ef][ff][gf]
AW[ba][ea][ha][bb][hb][bc][cc][fc][hc][cd][fd][hd][fe][ge][he]
LB[aa:a]

;B[dd]C[B2]MN[2]
;W[db]C[W3]MN[3]

;LB[aa:a]
)
