(;SZ[19]AB[bs]AB[cr]AB[br]AB[ar]AB[ds]AB[aq]AB[ap]AB[bp]AB[ao]AB[an]AB[bn]AB[am]AB[al]AB[bl]AB[cl]AB[dl]AB[ck]AB[dk]AB[ek]AB[dj]AB[ej]AB[fj]AB[gj]AB[hj]AB[ei]AB[fi]AB[gi]AB[hi]AB[gh]AB[hh]AB[hg]AB[ig]AB[if]AB[jf]AB[je]AB[ke]AB[kd]AB[ld]AB[lc]AB[mc]AB[mb]AB[ma]AB[gk]AB[gl]AB[gm]AB[gn]AB[dn]AB[do]AB[dp]AB[ep]AB[eq]AB[fq]AB[gq]AB[hq]AB[gr]AB[gs]AB[hs]AB[ir]AB[jr]AB[js]AB[ks]AB[mr]AB[ms]AB[os]AB[or]AB[oq]AB[pq]AB[qq]AB[rq]AB[sq]AB[sr]AB[rs]AB[np]AB[mp]AB[lp]AB[kp]AB[jp]AB[jo]AB[io]AB[ho]AB[in]AB[hn]AB[hm]AB[jj]AB[kj]AB[lj]AB[ki]AB[kk]AB[kl]AB[ll]AB[lm]AB[ln]AB[mn]AB[nn]AB[oo]AB[on]AB[om]AB[nm]AB[nl]AB[nk]AB[pl]AB[ql]AB[rl]AB[rm]AB[sm]AB[rn]AB[qk]AB[rk]AB[sk]AB[pj]AB[pi]AB[qi]AB[rh]AB[qh]AB[ph]AB[oh]AB[nh]AB[mh]AB[lh]AB[nf]AB[ng]AB[oe]AB[pe]AB[qe]AB[qf]AB[qg]AB[pf]AB[pd]AB[pc]AB[oc]AB[ob]AB[oa]AB[ib]AB[hc]AB[gd]AB[gc]AB[fc]AB[ec]AB[eb]AB[dc]AB[de]AB[ce]AB[df]AB[ef]AB[cg]AB[bh]AB[ja]AW[fs]AW[fr]AW[ee]AW[er]AW[dr]AW[dq]AW[cq]AW[bq]AW[cp]AW[co]AW[bo]AW[cn]AW[cm]AW[bm]AW[dm]AW[el]AW[fk]AW[fl]AW[fm]AW[fn]AW[en]AW[eo]AW[go]AW[gp]AW[fp]AW[hp]AW[ip]AW[iq]AW[jq]AW[kq]AW[kr]AW[ls]AW[lq]AW[mq]AW[nq]AW[nr]AW[ns]AW[sp]AW[so]AW[rp]AW[ro]AW[qp]AW[pp]AW[op]AW[po]AW[pn]AW[pm]AW[qm]AW[qn]AW[ol]AW[ok]AW[pk]AW[oj]AW[oi]AW[ni]AW[mi]AW[li]AW[mj]AW[mk]AW[ml]AW[mm]AW[qj]AW[rj]AW[sj]AW[si]AW[ri]AW[sh]AW[sg]AW[rg]AW[sf]AW[rf]AW[re]AW[rd]AW[qd]AW[qc]AW[pb]AW[pa]AW[qa]AW[of]AW[og]AW[od]AW[nd]AW[nc]AW[nb]AW[na]AW[md]AW[me]AW[le]AW[mf]AW[mg]AW[lg]AW[kg]AW[kf]AW[kh]AW[jg]AW[jh]AW[ih]AW[ii]AW[ji]AW[ij]AW[hk]AW[hl]AW[ik]AW[jk]AW[jl]AW[il]AW[im]AW[jm]AW[km]AW[kn]AW[jn]AW[ko]AW[lo]AW[mo]AW[no]AW[ak]AW[bk]AW[bj]AW[cj]AW[ai]AW[ch]AW[di]AW[eg]AW[eh]AW[fh]AW[ff]AW[gg]AW[fd]AW[ge]AW[hf]AW[hd]AW[ie]AW[ic]AW[jd]AW[jb]AW[kc]AW[lb]AW[la]AW[fb]AW[ea]AW[da]AW[ba]AW[cb]AW[cc]AW[bc]AW[ab]AW[bd]AW[be]AW[bf]AW[cf]AW[af]TR[ja]C[Black has continued from part 2 with the marked stone. White to ensure the continuing safety of the M3 and Q6 groups.]FF[4]GM[1]AP[SGFC:1.13b]GN[temp3] (;W[kb];B[ia] (;W[hb];B[gb]LB[he:a]LB[ga:b]C[connect at 'a' or steal the eye at 'b'?] (;W[he];B[ha]LB[id:a]C[please connect at 'a'];W[id];B[ed];W[fe];B[dg];W[dh];B[bi] (;W[ah];B[bg] (;W[ci];B[ag] (;W[dd];B[aj];W[ai];B[cd];W[fa];B[ga]C[Please defend at R18 if and when you think the top left is played out.] (;W[db];B[dd] (;W[aj];B[rb] (;W[qb];B[sd] (;W[rc];B[sc] (;W[ra];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sb];B[sa]C[You have saved all white's groups although the sacrifice at T18 was not needed (S19 good enough). RIGHT]) (;W[sa];B[sb])) (;W[se];B[rc];W[sc];B[ra]) (;W[ra];B[sc] (;W[rc];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sa];B[sb]C[dead]) (;W[se];B[sb]C[dead]) (;W[sb];B[sa]C[white is heading for a big loss by setting up the ko, black has very large threats at A12 and Q13 (and other loss making threats which would still be profitable overall).])) (;W[sa];B[sb]C[dead]) (;W[sc];B[rc] (;W[se];B[ra]) (;W[sb];B[sa] (;W[sc];B[sb]C[You have saved all white's groups (although using a lot of unnecessary sacrifices at the end). RIGHT]) (;W[sb];B[sc]C[dead])) (;W[ra];B[sb]C[You have saved all white's groups (although the sacrifice at T17 was unnecessary). RIGHT]) (;W[sa];B[sb]C[dead])) (;W[sb];B[sc] (;W[ra];B[sa]C[white is heading for a big loss by setting up the ko, black has very large threats at A12 and Q13 (and other loss making threats which would still be profitable overall).]) (;W[rc];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT]) (;W[sa];B[ra]C[dead]) (;W[se];B[sa]C[dead]))) (;W[ra];B[qb]C[disaster]) (;W[rc];B[qb]C[disaster])) (;W[qb];B[ah] (;W[jc];B[aj];W[fg];B[ka];W[ai];B[pg]C[this threat is much bigger than the ko which is also enormous but white has no ko-threat to follow which doesn't incur an equally big loss.]) (;W[fg];B[aj];W[jc];B[ka];W[ai];B[pg]C[this threat is much bigger than the ko which is also enormous but white has no ko-threat to follow which doesn't incur an equally big loss.])) (;W[fg];B[ah] (;W[aj];B[rb];W[qb];B[sd] (;W[rc];B[sc] (;W[ra];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sb];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT]) (;W[sa];B[sb]C[dead])) (;W[se];B[rc];W[sc];B[ra]) (;W[ra];B[sc] (;W[rc];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sb];B[sa]C[white is heading for a big loss by setting up the ko, black has a very large threat Q13 (and other loss making threats which would still be profitable overall).]) (;W[sa];B[sb]C[dead]) (;W[se];B[sb]C[dead])) (;W[sa];B[sb]C[dead]) (;W[sb];B[sc] (;W[ra];B[sa]C[white is heading for a big loss by setting up the ko, black has a very large threat Q13 (and other loss making threats which would still be profitable overall).]) (;W[sa];B[ra]C[dead]) (;W[se];B[sa]C[dead]) (;W[rc];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT])) (;W[sc];B[rc] (;W[se];B[ra]) (;W[ra];B[sb]C[You have saved all white's groups (although the sacrifice at T17 was unnecessary). RIGHT]) (;W[sb];B[sa] (;W[sb];B[sc]C[dead]) (;W[sc];B[sb]C[You have saved all white's groups (although the sacrifices at the end were unnecessary). RIGHT])) (;W[sa];B[sb]C[dead]))) (;W[qb];B[aj]C[black can play the 1000yr ko thanks to the threat at Q13];W[jc];B[ka];W[ai];B[pg]C[this threat is much bigger than the ko which is also enormous but white has no ko-threat to follow which doesn't incur an equally big loss.]) (;W[jc];B[aj]C[whiite must avoid the 1000yr ko due to black's ko-threat at Q13])) (;W[jc];B[ah];W[fg];B[aj]C[white must avoid the 1000yr ko due to black's ko-threat at Q13])) (;W[aj];B[dd] (;W[db];B[rb] (;W[ra];B[qb]C[disaster]) (;W[rc];B[qb]C[disaster]) (;W[qb];B[sd] (;W[rc];B[sc] (;W[ra];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sa];B[sb]) (;W[sb];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT])) (;W[se];B[rc];W[sc];B[ra]) (;W[ra];B[sc] (;W[rc];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sb];B[sa]C[white is heading for a big loss by setting up the ko, black has very large threats at A12 and Q13 (and other loss making threats which would still be profitable overall).]) (;W[se];B[sb]C[dead]) (;W[sa];B[sb]C[dead])) (;W[sa];B[sb]C[dead]) (;W[sc];B[rc] (;W[se];B[ra]) (;W[ra];B[sb]C[You have saved all white's groups (although the sacrifice at T17 was unnecesssary). RIGHT]) (;W[sb];B[sa] (;W[sc];B[sb]C[You have saved all white's groups (altough the sacrifices in the top right were unnecessary). RIGHT]) (;W[sb];B[sc]C[dead])) (;W[sa];B[sb]C[dead])) (;W[sb];B[sc] (;W[rc];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT]) (;W[ra];B[sa]C[white is heading for a big loss by setting up the ko, black has very large threats at A12 and Q13 (and other loss making threats which would still be profitable overall).]) (;W[se];B[sa]C[dead]) (;W[sa];B[ra]C[dead])))) (;W[qb];B[ah];W[fg];B[ka])) (;W[qb];B[dd] (;W[db];B[ah] (;W[fg];B[aj];W[jc];B[ka];W[ai];B[pg]C[this threat is much bigger than the ko which is also enormous but white has no ko-threat to follow which doesn't incur an equally big loss.]) (;W[jc];B[aj];W[fg];B[ka];W[ai];B[pg]C[this threat is much bigger than the ko which is also enormous but white has no ko-threat to follow which doesn't incur an equally big loss.])) (;W[fg];B[ka];W[jc];B[ah];W[db];B[aj]C[ko, black takes first]) (;W[jc];B[ah] (;W[fg];B[ka];W[db];B[aj]C[ko, black takes first]) (;W[db];B[aj];W[fg];B[ka];W[ai];B[pg]C[this threat is much bigger than the ko which is also enormous but white has no ko-threat to follow which doesn't incur an equally big loss.]))) (;W[fg];B[dd] (;W[db];B[ah] (;W[aj];B[rb] (;W[ra];B[qb]C[disaster]) (;W[rc];B[qb]C[disaster]) (;W[qb];B[sd] (;W[rc];B[sc] (;W[ra];B[sb]C[You have saved all white's groups. RIGHT]) (;W[sa];B[sb]C[dead]) (;W[sb];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT])) (;W[se];B[rc];W[sc];B[ra]) (;W[ra];B[sc] (;W[rc];B[sb]C[You have saved all white's groups. RIGHT]) (;W[se];B[sb]C[dead]) (;W[sa];B[sb]C[dead]) (;W[sb];B[sa]C[white is heading for a big loss by setting up the ko, black has a very large threat at Q13 (and other loss making threats which would still be profitable overall).])) (;W[sa];B[sb]C[dead]) (;W[sb];B[sc] (;W[ra];B[sa]C[white is heading for a big loss by setting up the ko, black has a very large threat at Q13 (and other loss making threats which would still be profitable overall).]) (;W[rc];B[sa]C[You have saved all white's groups (although the sacrifice at T18 was unnecessary). RIGHT]) (;W[sa];B[ra]C[dead]) (;W[se];B[sa]C[dead])) (;W[sc];B[rc] (;W[ra];B[sb]C[You have saved all white's groups (although the sacrifce at T17 was unnecessary). RIGHT]) (;W[sb];B[sa] (;W[sc];B[sb]C[You have saved all white's groups (although all the sacifices at the end were unnecessary). RIGHT]) (;W[sb];B[sc]C[dead])) (;W[se];B[ra]) (;W[sa];B[sb]C[dead])))) (;W[jc];B[aj]C[white must avoid the 1000yr ko due to black's threat at Q13])) (;W[aj];B[ka];W[jc];B[ah]) (;W[jc];B[ah];W[db];B[aj]C[black has the large threat at Q13 with which to win the 1000 yr ko]) (;W[qb];B[ka];W[jc];B[ah];W[db];B[aj]C[ko, black takes first])) (;W[jc];B[dd] (;W[fg];B[ah];W[db];B[aj]C[black has the large threat at Q13 with which to play the 1000 yr ko]) (;W[db];B[ah] (;W[fg];B[aj]C[black has the large threat at Q13 with which to play the 1000 yr ko]) (;W[qb];B[aj];W[fg];B[ka];W[ai];B[pg]C[this threat is even larger than the ko.])) (;W[qb];B[ah] (;W[db];B[aj];W[fg];B[ka];W[ai];B[pg]C[this threat is even larger than the ko]) (;W[fg];B[ka];W[db];B[aj]C[ko, black takes first])))) (;W[cd];B[dd];W[fa];B[aj];W[ai];B[ka];W[jc];B[ah];W[ga];B[aj]C[ko, black takes first (if white exchanges H18 for F13 the M3 group is dead).]) (;W[fa];B[ka];W[jc];B[aj];W[ai];B[ah] (;W[ga];B[aj]C[ko, black takes first (if white exchanges H18 for F13 the M3 group dies).]) (;W[dd];B[aj]C[ko, black takes first]) (;W[cd];B[aj]C[ko, black takes first (D16 acts as a local threat for black)])) (;W[fg];B[ka];W[jc];B[aj];W[ai];B[fa]) (;W[jc];B[aj];W[ai];B[fa])) (;W[ag];B[ci]) (;W[dd];B[ci]) (;W[cd];B[ci])) (;W[ci];B[ah] (;W[bg];B[aj]C[ko, black takes first (if white connects at F13 black plays atari at L19)]) (;W[ag];B[aj]C[ko, black takes first (if white connects at F13 black plays atari at L19), B13 acts as if a local threat for black])) (;W[bg];B[ah] (;W[ag];B[aj]C[ko, black takes first]) (;W[ci];B[aj]C[ko, black takes first (if white connects at F13 black plays atari at L19)]) (;W[fg];B[aj]C[ko, black takes first (if white connects at C11 black plays atari at L19)]) (;W[dd];B[aj]C[ko, black takes first]) (;W[cd];B[aj]C[ko, black takes first]))) (;W[ga];B[ha]LB[fa:a]LB[he:b]C[connect at 'a' or 'b'?] (;W[fa];B[hb]C[white will be unable to connect after black L19]) (;W[he];B[fa]LB[id:a]C[please connect at 'a'];W[id];B[dg];W[dh];B[ka];W[jc];B[ed];W[fe];B[bi] (;W[ah];B[bg] (;W[ag];B[ci]) (;W[dd];B[ci]) (;W[ci];B[ag];W[dd];B[aj];W[ai];B[cd])) (;W[ci];B[ah] (;W[bg];B[aj]C[ko, black takes first]) (;W[ag];B[aj]C[ko, black takes first (B13 acts as if a local black threat)])) (;W[bg];B[ah] (;W[ag];B[aj]C[ko, black takes first]) (;W[ci];B[aj]C[ko, black takes first]) (;W[dd];B[aj]C[ko, black takes first]))))) (;W[he];B[ka]) (;W[id];B[ka]) (;W[jc];B[ka]) (;W[ha];B[hb] (;W[he];B[ka]) (;W[id];B[ka]) (;W[jc];B[ka]))) (;W[ia];B[ha];W[kb];B[ia]C[black captures some stones]) (;W[hb];B[kb]C[the M3 stones die]))