(;AW[op]AW[pp]AW[qp]AW[rp]AW[oq]AW[rq]AW[sq]AW[nr]AW[or]AW[pr]AW[ns]AB[mo]AB[oo]AB[po]AB[qo]AB[ro]AB[so]AB[np]AB[sp]AB[nq]AB[qq]AB[mr]AB[qr]AB[rr]AB[ms]AB[qs]AB[rs]AB[ss]C[best move for black?]SZ[19]GM[1]FF[3]RU[Japanese]HA[0]KM[5.5]PW[White]PB[Black]GN[White (W) vs. Black (B)]DT[1999-07-28]SY[Cgoban 1.9.2]TM[30:00(5x1:00)] (;B[ps]C[seki: nobody dies. The groups share all remaining liberties so neither side can atari the other without giving atari to the own group. So both sides live.RIGHT]) (;B[pq];W[ps]) (;B[sr];W[ps]))