(;GM[1]FF[4]SZ[19]
GN[The purpose of B1]
PC[http://senseis.xmp.net/?TsumegoFromGames35/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?TsumegoFromGames35/Solution

The purpose of B1]
PL[B]

AB[gb][ec][fc][hc][oc][rc][cd][dd][pd][qd][sd][be][ce][re][pf][qf][sf][pg][ch][nh][oh][pi][dj][pj][qj][bk][pk][ro][bp][dp][ep][pp][cq][hq][lq][oq][er][mr]
AW[eb][fb][bc][cc][dc][nc][bd][jd][nd][qe][cf][rf][qg][ph][qh][rh][oi][nj][rj][qk][dl][pl][ql][qn][co][do][cp][jp][lp][np][fq][nq]

;B[rg]C[B1]MN[1]
;B[ri]C[B3]MN[3]
;W[si]C[W4]MN[4]
;B[qi]C[B5]MN[5]
;W[sh]C[W6]MN[6]
;B[sg]C[B7]MN[7]
;W[sj]C[W8]MN[8]
;B[rk]C[B9]MN[9]

;
)
