(;GM[1]FF[3]SZ[19]
AW[ob][oc][qd][qc]AB[mb][nc][md][od][pd][qe][qf][qh]PL[B]LB[pc:A][pb:B]C[Black to play and kill.
(Guan Zi Pu)
Consider the exchange Black A, White B, or else it will become a ko.])