(;GM[1]FF[4]SZ[19]
GN[Black is better off with Group Tax]
PC[http://senseis.xmp.net/?GroupTax/Discussion]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GroupTax/Discussion

Black is better off with Group Tax]
PL[B]

AB[an][bn][cn][co][cp][cq][dq][eq][fq][br][fr][as][fs]
AW[ao][bo][bp][aq][bq][cr][dr][er][cs][es]


;
)
