(;GM[1]FF[4]SO[bgj 205]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]AW[rr][sp][rp][qp][qq][pq][oq][nr][mr][mq][lq][lp]AB[or][pr][qr][nq][np][mp][op][pp][po][qo][ro][so]C[page 5
journal problem 1

Black to play and kill]GN[5 - problem 1](;B[sq]C[Playing this atari fails.];W[rq];B[rs];W[sr];B[qs];W[os])(;B[sr]C[This is the correct play.](;W[rq];B[rs]C[White runs out of liberties.])(;W[rs];B[rq]C[Snap-back shape.])))(;GM[1]FF[4]SZ[19]SO[bgj 205]AP[Sabaki:0.52.2]CA[UTF-8]GN[6 - tsumego advice 12 problem 1]DT[2020-11-24]KM[-7.5]RU[Simple]AB[ap:ep][eq:es]AW[aq:dq][dr:ds]AE[ba][na:nb][pb:rb][ac][cc:ce][oc:qc][ae][qe:re][bf:bh][oh][qh][pl:ps][ql:rl][rn:ro][do][oq][ar][cr:cs][qr:rr]PL[B]C[page 6
advice for doing tsumego part 12
problem 1

Black to play](;B[br](;W[bs];B[ar])(;W[ar];B[bs];W[ho](;B[cs];W[hp];B[cr])(;B[as];W[hp](;B[cs])(;B[cr];W[cs](;B[br];W[bs])(;B[bs];W[br])))))(;B[bs];W[br];B[cs](;W[as];B[ar])(;W[dm];B[as];W[em];B[ar];W[cr];B[bs];W[as];B[ar])))(;GM[1]FF[4]SZ[19]SO[bgj 205]AP[Sabaki:0.52.2]CA[UTF-8]GN[8 - tsumego advice 12 problem 2]DT[2020-11-24]KM[-7.5]RU[Simple]AB[oa][qa:qb][ra][mb:nb][pb][md:rd]AW[sa:sb][ob:oc][rb:rc][pc:qc]AE[da:dh][bb:cb][ec][be:bf][pe][bh:ch][cl][el][rl:rn][bo:co][qo:qq][so][cq:eq][sq][br:dr][fr:fs][rs]PL[B]C[page 8
advice for doing tsumego part 12
problem 2

Black to play](;B[pa];W[na];B[qa])(;B[na];W[pa];B[qa];W[qb];B[pb])(;B[nc];W[pa];B[qa](;W[qb];B[pb])(;W[na];B[qb])))(;GM[1]FF[4]SZ[19]SO[bgj 205]AP[Sabaki:0.52.2]CA[UTF-8]GN[9 - tsumego advice 12 problem 3]DT[2020-11-24]KM[-7.5]RU[Simple]AB[mc:oc][sc:sd][pd:rd]AW[pb][sb][qc:rc]AE[da:dh][qa:qb][bb:cb][ec][pc][be:bf][pe][bh:ch][cl][el][rl:rn][bo:co][qo:qq][so][cq:eq][sq][br:dr][fr:fs][rs]PL[B]C[page 9
advice for doing tsumego part 12
problem 3

Black to play](;B[ra](;W[qa];B[rb];W[ob];B[nb](;W[oa];B[sa])(;W[qb];B[oa]))(;W[rb];B[qa];W[ob];B[nb];W[oa];B[nf];W[pc];B[ng]))(;B[rb];W[ra])(;B[ob];W[ra]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[10 - tsumego advice 12 problem 4]DT[2020-11-24]KM[-7.5]RU[Simple]AB[ci][aj:bj][ck:dk][dl][dn:en][cp:ep][bq]AW[bk][al][cl:co][bm][bo:bp][ap]AE[da:dh][qa:qb][bb:cb][sb][ec][pc:pe][rc][be:bf][bh:ch][el][rl:rn][qo:qq][so][cq:eq][sq][br:dr][fr:fs][rs]PL[B]C[page 10
advice for doing tsumego part 12
problem 4

Black to play](;B[ak](;W[an];B[bl];W[gl];B[am];W[gm])(;W[bl];B[an]))(;B[an]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[11 - tsumego advice 12 problem 5]DT[2020-11-24]KM[-7.5]RU[Simple]AB[la:le][ra][ob][qb:qc][rc][pd:pf][me][nf:of]AW[ma:md][qa][pb:pc][oc:oe][ne]AE[da:dh][bb:cb][sb][ec][be:bf][bh:ch][cl][el][rl:rn][bo:co][qo:qq][so][cq:eq][sq][br:dr][fr:fs][rs]PL[B]C[page 11
advice for doing tsumego part 12
problem 5

Black to play](;B[nc](;W[pa](;B[na];W[nd];B[nb])(;B[nb];W[na]))(;W[nb];B[oa])(;W[nd];B[nb])(;W[oa];B[nb]))(;B[pa];W[oa];B[na];W[nb])(;B[oa];W[pa];B[nc];W[nd])(;B[na];W[nb]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[12 - tsumego advice 12 problem 6 ]DT[2020-11-24]KM[-7.5]RU[Simple]AB[em:eo][gm:gn][in:ip][bo][cp][bq:br][er][gr][ir:jr][cs]AW[fo:fp][ho:hp][cq:eq][gq][cr][hr][ds]AE[ba][na:nb][pb:rb][ac][cc:ce][oc:qc][ae][qe:re][bf:bh][oh][qh][pl:ps][ql:rl][rn:ro][do:dp][oq][ar][qr:rr]PL[B]C[page 12
advice for doing tsumego part 12
problem 6

Problem from part eleven in BGJ 204

Black to play](;B[fr];W[hs](;B[bs];W[dr](;B[go](;W[fs];B[fq])(;W[fq];B[fs]))(;B[fq];W[ep];B[go];W[gp];B[fs]))(;B[go];W[fq];B[bs];W[fs];B[dr];W[gs]))(;B[hs];W[fr];B[hq](;W[go];B[fs];W[dr];B[fq])(;W[fs];B[go]LB[ep:B][gp:A]))(;B[go];W[fr];B[es];W[fs])(;B[bs];W[fr];B[es];W[fs]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[13 - tsumego advice 12 problem 6b]KM[7.5]AB[pj][oo:op][dp][fp:fq][gp][jp:js][lp:np][pp][kq][mq:nq][gr][nr:ns][ls]AW[nj][jl:jo][nl:nm][lm][pm][on][go][io:ir][no][po:qo][qp:qq][gq][lq:lr][oq:or][pq][kr][mr]TR[nl][jm][qo]C[page 13
advice for doing tsumego part 12
problem 6 related position

Black to play];W[ko];B[mo];W[kp];B[ms];W[is];B[ks];W[lr];B[qs];W[rr](;B[nn];W[mn])(;B[mn];W[nn];B[mm];W[ml]))(;GM[1]FF[4]SZ[19]SO[bgj 205]AP[Sabaki:0.52.2]CA[UTF-8]GN[14 - tsumego advice 12 problem 7]US[Richard Hunter]AB[jb:jc][kb][mb:nb][sb][rc][kd:kf][qd][oe:of][re][lf:nf][qf]AW[la:le][rb][kc][mc][pc:pd][qc][nd:ne]C[page 14
advice for doing tsumego part 12
problem 7

Problem for part thirteen in BGJ 206

Black to play])(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[16 - problem 2]AB[op][pp][qp][mq][oq]AW[pq][qq][rr]C[page 16
journal problem 2

Black to play];B[rp]C[This is the correct first play.];W[or];B[nr](;W[ps](;B[sr]C[However this is incorrect.];W[qr];B[rs];W[sq];B[rq];W[ss]C[White gets a ko.])(;B[ns]C[This is the correct play.](;W[rq];B[sq];W[sr];B[rs];W[qs];B[pr]C[White is dead.])(;W[qs];B[rq];W[sr];B[pr]C[White is dead.])))(;W[qs]C[This also fails for White.];B[pr];W[os];B[rq];W[qr];B[sr]C[White is dead.])(;W[pr]C[This fails too.];B[qs];W[rs];B[sr]C[White is dead.]))(;GM[1]FF[4]SO[bgj 205]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]AB[rs][rq][qr][pq][oq][nq][mp][lp][lq][lr]AW[mq][mr][nr][np][op][pp][qp][qq][rp][rr][sr]C[page 20
journal problem 3

Black to play]GN[20 - problem 3](;B[pr]C[This fails.];W[os];B[ms];W[ps]C[Black runs short of liberties.];B[qs]C[Connecting here does not help.];W[sq])(;B[os]C[This is the correct play.](;W[pr];B[or];W[qs]L[ms]C[The best White can do is save the corner. Black doesn't yet need to play at A.])(;W[or]C[This way White runs out of liberties.];B[pr];W[qs];B[ps])))(;ST[2]SO[bgj 205]AP[Sabaki:0.52.2]SZ[19]GM[1]FF[4]CA[UTF-8]GN[ 24 - British Championship game 1]PM[2]TM[11100]PW[Bruno Poltronieri]RU[Japanese]KM[6.5]RO[1]FG[259:]DT[2023-08-26]BR[5d]PC[The KGS Go Server at http://www.gokgs.com/]PB[Ho Yeung Woo]EV[British Go Championship]RE[B+Resign]WR[4d]CO[Artem Kachanovskyi];B[pd];W[dp];B[pp];W[dd];B[cq];W[cp];B[dq];W[ep];B[fq];C[ ]W[qf](;B[gr];W[nc];B[nd];W[md];B[ne](;W[pc];B[qc];W[oc];B[qd];W[qi];B[kd];W[me];B[ph];W[qh];B[pf];W[lc];B[pg];W[re];B[kc];C[The variant played out in the upper-right corner is a modern joseki.]W[mg];B[qk];W[pi];B[nh](;C[This move is slow - White can't cut Black's shape after the next move, see the diagram.]W[oi];B[mh](;W[lg];B[gd](;W[oh];B[ng];W[nf];B[og];W[ki];B[mj];W[ok];B[qm];W[ml];B[lk];W[ll];B[kk];W[kl];FG[259:]PM[2];B[jk];W[jf](;B[dc];W[ec];B[ed];W[cc];B[db];W[fd];B[ee](;W[gc];B[fe];W[fc](;B[cb];W[hd];B[ge];W[ic];B[cf];W[cg](;B[dg];W[dh];B[ch];W[bg];B[bh];W[cd];B[bc];W[bd];B[bb];W[df];B[eg];W[bf];B[de];W[ce](;B[ae](;C[Here was the culmination of the struggle in this game - one of the sides was about to die, no compromise! In such moments, emotions of the players are heated and it's hard to play with a cool mind. Bruno Poltronieri had a great chance but he missed it in the game.]W[ci];B[bi];W[cj];B[bj];W[ck];B[bk](;W[cl];C[This atari is too painful for White; it's hard to recover after it.]B[eh];W[di];B[bl];W[bm];C[Black not only kills White on the left, but also creates an aji with this cut, so White was forced to protect at 100. That's a success for Ho Yeung Woo.]B[cm];W[bn];B[ad];W[ah];B[be];W[fj];FG[259:]PM[2];B[jl];W[jm];B[im];W[in];B[jn];W[km];B[hn];W[io];B[hm];W[jo];C[Black started the last fight here. Even though White anyway didn't have any chance in it, there was no need to complicate the situation - it would be enough to occupy a big point, for example A.]LB[oq:A]B[jh];W[ji];B[ii];W[ih];B[ig];W[hh];B[jg];W[hg];B[if];W[hf];B[he];W[ie];B[je];W[id];B[kf];C[Perhaps a timesuji.]W[ef];B[ff];W[kg];C[A clever attachment. Ho Yeung Woo must have aimed at it when he played Black 111 earlier.]B[ib];W[jb];B[hb];W[jc];B[kb];W[ia];B[ha];W[ja];B[eb];W[kh];B[jf];W[fa];B[fb];W[gb];B[hi];W[gi];B[hk];W[fg];C[This was an exciting game with a fierce battle on the left side deciding its outcome. Let's look forward to seeing the next game of the series!]B[cf])(;MN[1]FG[259:]PM[2];C[Instead of White 90 in the game, Bruno had a last chance to extend here.]W[eh];B[ad];W[fg];B[ef];W[gf];B[be];C[White dies on the left side, but he can launch an attack on the group in the middle and extend at A later to play for points. This would still be a game.]LB[cl:A]W[im]))(;FG[259:]MN[1]PM[2]VW[aa:jk];C[White's extension would be a strong move. Let's look at a few variants.]W[eh](;MN[1]FG[259:]PM[2];C[Black's can't afford this jump, the group above dies.]B[cj];W[fg];B[ef];W[gf])(;FG[259:]MN[1]PM[2]VW[aa:jk];B[fh];W[dj];B[bj];W[fg];B[ef];W[gf];B[gg];W[he];B[cf];C[Black can't win this ko fight, he has no ko threat of necessary value.]W[ci])(;FG[259:]MN[1]PM[2]VW[aa:js];B[fg];W[fh];B[gh];W[gi];B[hh];W[dj];B[bj];W[bk];B[bi];C[Black's stones on the left die.]W[cj])))(;FG[259:]MN[1]PM[2]VW[aa:jk];B[cj];W[ae];B[ag];W[eb];B[ac];W[aa];B[da];W[ba];B[ef];W[ea];B[ad];W[ab];B[ca];W[aa];C[If Black omits 83 in the game, a ko fight in the corner follows. Since this was Black's corner, it would be a disaster for Black.]B[cf]))(;C[ ]FG[259:]MN[1]PM[2]VW[aa:jh];C[White 68 exploiting the aji in the upper-left corner is a good move. Black's response, however, was too careless! It's better to play a safe move shown in this diagram.]B[bf]))(;FG[259:]MN[1]PM[2]VW[aa:sm];B[hc];W[hd];B[ge];W[hb];B[ic];W[cb];B[de];W[cd];C[After White 60 and 62 in the game, Black can't draw back anymore. It would be too submissive to play as in this diagram.]B[ie]))(;FG[259:]MN[1]PM[2]VW[aa:sm];W[fc];B[fe];W[cb];B[de];W[cd];B[gc];W[eb];B[fb];W[da];C[When Black played a cross-cut 55 in the game, this must have been his initial idea - trading two stones for the thickness. In the game White resists, demonstrating fighting spirit.]B[hf]))(;FG[259:]MN[1]PM[2]VW[aa:sg];B[id];W[fc];B[gc];C[Black 53 in the game is an active way of protecting a group on the upper side. A passive defense shown in this diagram is less interesting.]W[cf]))(;FG[259:]MN[1]PM[2]VW[ja:sr];W[qn];C[As long as White has a potentially weak group on the right side, it's hard to invade between the black stones. Black would fight aiming at eliminating White's life base with A.]LB[rj:A]B[pm])(;MN[1]FG[259:]PM[2];W[ok];C[White's attack in the center in the game didn't bring any clear profit. Instead, White could protect his group with a one-space jump and play a big move next, for example A or B.]LB[ec:A][qq:B]B[qm]))(;FG[259:]MN[1]PM[2]VW[ia:sl];W[nf];B[ng];W[pe];B[qe];W[oe];B[qg];W[rf];C[White's three stones die.]B[rg]))(;FG[259:]MN[1]PM[2]VW[ia:ss];W[pk];B[pl];W[ok];C[A more active alternative to White 34 in the game. White can cut at A after Black protects his group in the center.]LB[ql:A]B[mh]))(;FG[259:]MN[1]PM[2]VW[ka:sh];C[ ]W[qc];B[oc];W[qd];C[This used to be a popular joseki in the pre-AI era. Nowadays, however, you can rarely see it in the professional games, since the AI considers the result good for Black.]B[mc]))(;B[nc];FG[259:]MN[1]PM[2]VW[an:is];W[eq];B[er];W[dr];B[cr];W[fr];B[ds];C[White 10 in the game aims at this ladder.]W[gq]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[31 - club zero]PW[Kobayashi Koichi]WR[9d]PB[Takemiya Masaki]BR[9d]EV[20th Meijin Final]RO[Game 5]DT[1995-10-25,26]PC[ANA Hotel Tokyo]KM[5.5]RE[B+R];B[pd];W[pp];B[dd];W[dp];B[jd];W[qf];B[pj];W[qc];B[qd];W[pc];B[od];W[rd];B[re];W[rc];B[qe];W[nc];B[pm];W[mp];B[dj];W[dm];B[nd];W[mc];B[md];W[dh];B[fj];W[df];B[gh];W[ff];B[fd];W[hf];B[ig];W[gd];B[gc];W[hd];B[fe];W[fh];B[fi];W[gg];B[hg];W[ge];B[eh];W[fg];B[jf];W[fc];B[ec];W[fb];B[gb];W[eb];B[db];W[ee];B[ed];W[cd];B[fa];W[de];B[ea];W[mm];B[mk];W[kl];B[qp];W[qq];B[qo];W[pq];B[hq];W[jq];B[jr];W[kr];B[er];W[dq];B[ir];W[ql];B[pl];W[qj];B[qi];W[qk];B[ri];W[pk];B[ok];W[oj];B[pi];W[pn];B[qm];W[qn];B[ol];W[rn];B[dr];W[cr];B[rm];W[kp];B[fp];W[fo];B[gp];W[kj];B[ch];W[dg];B[on];W[po];B[cl];W[cm];B[bg];W[ci];B[bi];W[cj];B[di];W[cg];B[bh];W[ck];B[dl];W[bl];B[bm];W[bk];B[bn];W[dk];B[el];W[ek];B[fk];W[fl];B[em];W[dn];B[fm];W[bo];B[co];W[bp];B[gl];W[do];B[be];W[bd];B[bf];W[ce];B[bj];W[an];B[ae];W[ag];B[aj];W[ah];B[ad];W[bb];B[ab];W[cb];B[eg];W[ic];B[jb];W[jc];B[kc];W[kd];B[ib];W[je];B[ke];W[id];B[ld];W[kf];B[jd];W[hh];B[gi];W[kd];B[ei];W[ef];B[jd];W[jg];B[ie];W[if];B[ih];W[je];B[am];W[cn];B[jf];W[hi];B[je];W[jh];B[ii];W[hj];B[he];W[gf];B[ij];W[hk];B[ik];W[hl];B[il];W[hm];B[cc];W[bc];B[ac])(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[32 - problem 4]AB[qn][mo][mp][mq][mr][no][oo][po][qp][rp][sp][oq][or][pr][ps][ns]AW[np][nq][nr][op][pp][pq][qq][rq][sq][qr][rr]C[page 32
journal problem 4

Black to play](;B[ms]C[Connecting here allows White to live.];W[qs];B[os];W[ss])(;B[rs]C[This is also wrong as it gives White a ko to live.];W[ss];B[sr])(;B[sr]C[This is the correct play. White runs out of liberties.](;W[ss];B[qs]C[Black has no danger so White is dead.])(;W[rs]C[Black has no danger so White is dead.]))(;B[os]C[Connecting here allows White to live.];W[qs];B[ms];W[ss])(;B[qs]C[This is also wrong.];W[rs]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 205]AP[Sabaki:0.52.2]GN[35 - problem 5]AB[qp][rp][sp][kq][lq][pq][pr][qq][mr][nr][os]AW[mo][po][qo][ro][so][lp][op][oq][or][pp][mq][nq][rq][rr][qr]C[page 35
journal problem 5

Black to play](;B[lr]C[If Black defends this weakness White lives.];W[sq];B[ps];W[qs];B[ns];W[ss])(;B[ps]C[Black should defend here instead.];W[qs](;B[rs]C[Black has to play here to stop the forcing plays that let White live.];W[ss];B[sq]C[Now White is short of liberties and dead in the corner.])(;B[ns]C[If Black plays here or elsewhere White can live.];W[sq];B[lr];W[ss]))(;B[rs]C[This is wrong.](;W[sq];B[ps];W[ss];B[sr]C[White gets a ko.])(;W[qs]C[This is a mistake by White.];B[ps];W[ss];B[sq]))(;B[sr]C[This is also wrong.](;W[qs];B[sq];W[ss];B[rs]C[Again White can get a ko.])(;W[sq]C[This is a mistake by White.];B[ps];W[ss];B[qs]))(;B[qs]C[This fails as Black runs out of liberties.];W[sq];B[ps];W[rs]))