(;GM[1]FF[4]SZ[19]
GN[Black to move next]
PC[http://senseis.xmp.net/?MiddleGameExercise1]AP[GoWiki:2009]
DT[2012-01-08]
C[Diagram from http://senseis.xmp.net/?MiddleGameExercise1

Black to move next]
PL[B]

AB[ob][fc][lc][oc][pc][id][pd][pe][nf][of][ql][om][po][pp][fq][jq][pq]
AW[pb][qb][nc][qc][dd][qd][df][pf][qf][og][ph][cn][qn][rn][dp][qp][qq]

;B[mh]C[B1]MN[1]
;W[di]C[W2]MN[2]
;B[fo]C[B3]MN[3]

;
)
