(;GM[1]FF[4]SZ[19]
GN[Black first to achieve the best possible result]
PC[http://senseis.xmp.net/?BeginnerExercise93/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise93/Solution

Black first to achieve the best possible result]
PL[B]

AB[hp][ip][jp][fq][gq][kq][lq][fr][lr][fs][ls]
AW[kp][lp][mp][hq][iq][jq][mq][gr][gs][is]

;B[jr]C[B1]MN[1]
;W[ir]C[W2]MN[2]
;B[js]C[B3]MN[3]
;W[ks]C[W4]MN[4]
;B[kr]C[B5]MN[5]
;W[mr]C[W6]MN[6]
;B[hr]C[B7]MN[7]

;
)
