(;SZ[19]GM[1]FF[4]AP[glGo:1.4]ST[1]AB[rr]AB[qr]AB[nr]AB[pq]AB[qp]AB[pp]AB[op]AB[np]AB[mp]AB[mo]AW[sr]AW[pr]AW[or]AW[rq]AW[qq]AW[oq]AW[rp]AW[qo]AW[po]AW[oo]AW[no]TR[pr]TR[or]TR[oq]PW[Weiss]PB[Schwarz]C[Black to capture the marked white stones.](;B[nq];W[rs]C[nope :(])(;B[sq]C[If you know the correct sequence, this move is not necessary.])(;B[ps];W[rs]C[nope :)])(;B[os];W[qs]C[nope :(])(;B[rs];W[sq](;B[nq];W[ss]C[Almost, but you missed one tesuji.])(;B[ro];W[rn](;B[nq]C[ Well done. White should have played ko by throwing in at R1.CHOICERIGHT])(;B[os]C[RIGHT])(;B[ps];W[os])(;B[ns];W[so](;B[ps];W[ss])(;B[nq];W[ss])(;B[os];W[ss])))(;B[ps];W[ss])(;B[os];W[ss]))(;B[qs];W[ps])(;B[ro];W[rs])(;B[sp];W[rs])(;B[ns];W[rs]))