(;AB[pa]AB[pb]AB[pc]AB[pd]AB[pe]AB[pf]AW[qe]AW[re]AW[qd]AW[qa]AW[qb]AW[qc]AB[sc]AW[rc]AB[se]AB[qf]AB[rf]C[Black has just played the marked stone. White to live in the best way possible.]TR[se]AP[goproblems] (;W[sd] (;B[rd];W[sb];B[sf]C[White can also play tenuki here, but assume the rest of the board is settled.];W[sd]C[Nice. 6 points in the corner (5 territory plus 2 captured stones less the throw-in).RIGHT]) (;B[sf];W[sb]C[Nice. 6 points in the corner (5 territory plus 1 captured stone).RIGHT])) (;W[sb];B[sd] (;W[rd];B[sf];W[ra]C[4 points worse than the correct solution.]) (;W[ra]C[4 points worse than the correct solution.])) (;W[rd];B[sb]C[White dies.]))