(;GM[1]FF[4]SO[bgj 207]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]C[page 1
journal problem 1

Black to play and live.]AB[sr][rr][qr][pq][oq][nq]AW[rq][qq][pp][op][np][mp][lq][mr][or][ro]GN[1 - problem 1](;B[pr]C[Connecting fails.];W[nr];B[ps];W[rs])(;B[rs]C[This also fails.];W[pr];B[nr];W[ns])(;B[nr]C[This is the correct first play.];W[ns](;B[pr];W[os];B[ps];W[ms];B[rs]C[Black lives.])(;B[ps]C[This also works.];W[os];B[pr];W[ms];B[rs])))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 207]AP[Sabaki:0.52.2]GN[11 - tsumego advice 14 problem 1]DT[2020-11-24]KM[-7.5]RU[Simple]AB[mb:nb][oc:od][pd:rd]AW[pa][ob][rb][pc:qc]AE[da:dh][qa:qb][bb:cb][sb][ec][rc][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 11
advice for doing tsumego part 14
problem 1](;B[na](;W[rc];B[sc];W[sb];B[ra];W[qa];B[pb])(;W[qa];B[rc];W[sb];B[pb]))(;B[sb];W[qb];B[ra];W[sc];B[rc]))(;GM[1]FF[4]SZ[19]CA[UTF-8]SO[bgj 207][1994-06 Kido furoku Hisajima 死活の急所 shikatsu no kyusho]AP[Sabaki:0.52.2]GN[12 - tsumego advice 14 problem 2]US[Richard Hunter]AB[kb:lb][sb][lc:mc][rc:rd][nd:qd]AW[na][mb][pb][rb][nc:oc][qc]C[page 12
advice for doing tsumego part 14
problem 2

Black to play](;B[la](;W[ra];B[pc];W[qb];B[ma];W[nb];B[pa])(;W[pc];B[qa];W[ra];B[pa](;W[oa];B[nb])(;W[ma];B[oa]))(;W[qa];B[pc](;W[nb];B[oa])(;W[oa];B[nb])))(;B[ra](;W[ob](;B[pa];W[qb];B[qa];W[oa];B[sc];W[sa];B[ra];W[qa])(;B[qb];W[pa];B[qp]))(;W[qa];B[qb]))(;B[pc](;W[ob];B[qb];W[pa])(;W[qb];B[ob];W[nb];B[ra]))(;B[ob];W[pc];B[ra];W[qa])(;B[qa];W[ra];B[pc];W[qb](;B[ob];W[nb])(;B[la];W[nb])(;B[nb];W[ob];B[la];W[ma])))(;GM[1]FF[4]SZ[19]SO[bgj 207]AP[Sabaki:0.52.2]CA[UTF-8]GN[13 - tsumego advice 14 problem 3]RU[Simple]AB[pp:pr][mq:mr][kr:lr][qr]AW[po:qo][mp:op][hq][jq:lq][qq:rq][jr][rr]PL[B]LB[nq:C][oq:D][ks:A][ns:E][os:F][qs:B]C[page 13
advice for doing tsumego part 14
problem 3

Black to play](;B[ns]CH[1];W[nq];B[nr](;W[oq];B[or])(;W[qs];B[ps]))(;W[nq];B[nr];W[oq];B[or];W[ks])(;B[ks](;W[qs](;B[nq];W[ns];B[ps];W[oq];B[or];W[ms])(;B[ms];W[os])(;B[ps];W[ms](;B[oq];W[nr];B[nq];W[os])(;B[ns];W[nr];B[nq];W[os])(;B[nq];W[oq];B[or];W[ns])))(;W[nq];B[nr];W[oq];B[or];W[qs];B[ps]))(;B[qs]BM[1];W[ks](;B[os];W[oq];B[or];W[ls];B[ms];W[nr];B[js];W[nq];B[ns];W[ks])(;B[ns];W[oq];B[or];W[nq];B[nr];W[ls])(;B[nq];W[os];B[ls];W[ns];B[oq];W[or]))(;B[oq];W[ks](;B[os];W[nr];B[nq];W[qs])(;B[ls];W[ns]))(;B[nq];W[ks](;B[ls];W[ns])(;B[ns];W[or];B[oq];W[ls]))(;B[os];W[nq];B[nr];W[oq];B[or];W[qs]))(;GM[1]FF[4]SO[bgj 207]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]AB[rq][rr][qr][pq][op][np][po][pn][on]AW[rp][qp][qq][qn][qm][pm][om][nm][mo][mp][mq][or]C[page 21
journal problem 2

Black to play and live.]GN[21 - problem 2](;B[pr]C[This play fails.];W[oq];B[pp];W[no]C[There is only one eye in the corner.])(;B[nr]C[This is the correct first play.];W[nq];B[oq];W[mr]C[With already one eye in the corner, Black would get a second if a white stone is captured on the edge.];B[pr];W[ns];B[no]L[nn][pp]C[A and B are miai to make a second eye.]))(;CA[UTF-8]SZ[19]ST[0]FF[4]SO[bgj 207]AP[Sabaki:0.52.2]GM[1]PW[Tim Hunt]VW[]WR[2d]KM[6.5]RE[W+R]PC[Shenzhen]DT[2023-12-18]BR[2d]EV[World Amateur Go Championship]FG[258:]RO[6]RU[IGF]GN[22 - game review round 6]PB[Renate Reisenegger]PM[2]C[page 32
43rd world amateur go championships round 6]CO[Tim Hunt];B[dp];W[pd];B[dc];VR[53.585]V[0.564250562]W[pp];VR[51.015]V[0.120429612]B[ci];W[cq];B[cp];W[dq];B[ep];VR[51.74]V[0.24437328]W[fr];B[nc];VR[51.69]V[0.200156312]W[qf];B[pc];W[qc];B[qb];W[oc];B[pb];W[nd];B[ob];W[od];B[mc];VR[55.294]V[0.773874368]W[pm];VR[53.202]V[0.437207071]B[md];VR[57.659]V[1.21636377]W[ce];B[cd];VR[55.413]V[0.846387069]W[ed];VR[53.115]V[0.494665971]B[dd];VR[62.646]V[2.17427279]W[ef];B[ee];W[fe];VR[61.009]V[1.87217657]B[de];VR[64.936]V[2.5759686]W[fg];VR[56.465]V[1.05426993]B[qh];W[qj];VR[56.505]V[1.07092484]B[oh];VR[63.767]V[2.44353705]W[ng];VR[50.26]V[2.39957376E-4]B[of];W[og];VR[50.116]V[-0.0247832402]B[qd];VR[51.928]V[0.281059378]W[pg];VR[48.393]V[-0.30057927]B[ql];VR[50.171]V[0.0038284596]W[qm];VR[43.681]V[-1.22860515]B[pl];W[ol];VR[38.521]V[-2.3269015]B[rm];VR[46.108]V[-0.80292641]W[rn];VR[38.055]V[-2.54333786]B[rk];VR[54.987]V[1.01827922]W[pk];VR[44.353]V[-1.26508033]B[om];W[po];VR[56.859]V[1.37086686]B[rj];VR[71.624]V[4.37981005]W[nk];B[sn];W[ro];VR[59.384]V[1.51691641]B[qi];VW[]FG[258:]PM[2];VR[71.487]V[4.32169914]W[gq];VR[65.42]V[2.82085786]B[gp];VR[69.801]V[4.24882882]W[hp];VR[59.998]V[1.76663981]B[ho];W[hq];B[fq];VR[64.336]V[2.78699226]W[io];B[hn];W[in];VR[49.188]V[-0.267075423]B[hm];VR[65.439]V[2.90028666]W[dj];VR[52.44]V[0.360909669]B[di];VR[65.861]V[3.02456674]W[fj];VR[53.336]V[0.523920185]B[ei];W[fi];VR[48.417]V[-0.374223841]B[ej];W[fk];VR[54.393]V[0.735868048]B[gf];VR[66.945]V[3.28245638]W[gg];B[hf];VR[64.12]V[2.67744178]W[ff];VR[50.603]V[-0.00529339847]B[or];VR[66.189]V[3.28638267]W[pq];VR[57.501]V[1.3825132]B[jp];W[ip];VR[51.869]V[0.181938467]B[lm];W[nm];B[lp];VR[52.966]V[0.473374365]W[mq];VR[43.721]V[-1.17501975]B[lq];VR[44.086]V[-1.03587148]W[nq];B[kl];W[im];B[hl];VR[41.892]V[-1.59601357]W[jk];VR[38.298]V[-2.48202703]B[lj];VR[53.069]V[0.482391741]W[el];B[mi];VR[56.252]V[1.04174293]W[cg];VR[53.598]V[0.505460977]B[cl];VR[69.805]V[4.25044526]W[oi];VR[50.288]V[-0.145994371]B[nh];W[ph];B[pi];W[ni];FG[258:]PM[2];VR[52.122]V[0.0438335434]B[mh];W[rc];B[rd];W[re];B[rb];W[qe];B[sc];W[qk];B[rg];W[rl](;B[sf];W[lf];B[ne];W[mg];B[kg];W[se];B[si];W[rh];B[sk];W[pe];B[le];W[kf];B[jg];W[jf];B[ig];W[if];B[hg];W[hd];FG[258:]PM[2];B[id];W[he];B[ie];W[ic];B[jd];W[kd];B[jc];W[kc];B[jb];W[kb];B[hb];W[gb];B[hc];W[gc];B[ke];W[je];B[ia];W[ka];B[lg];W[mf];B[qg];W[pf];B[bq];W[eq];B[fp];W[br];B[lr];W[be];B[eb];W[ga];B[bd];W[dm];B[cm];W[dn];B[bo];W[fn];B[ar];W[go];B[il];W[kn];B[ln];W[jl])(;FG[258:]MN[1]PM[2];B[mg];W[nf];B[mf];W[oe];B[pf];W[se];B[sl];W[sm];B[qg];W[pe];B[rm];W[cm];B[ql];W[dl]))(;GM[1]FF[4]CA[UTF-8]SZ[19]SO[bgj 207]AP[Sabaki:0.52.2]ST[2]BR[5d]RU[Japanese]KM[6.5]PB[Ho Yeung Woo]RO[3]PW[Bruno Poltronieri]FG[259:]PM[2]DT[2023-08-28]PC[The KGS Go Server at http://www.gokgs.com/]WR[4d]EV[British Go Championship]RE[B+Resign]GN[ 25 - British championship game 3]TM[11100]C[page 25
British championship game 3]CO[Artem Kachanovskyi];C[This is the third and deciding game of the best-of-three final match of the 2023 British Championship between Ho Yeung Woo 5d (Black) and Bruno Poltronieri 4d, played on the 28th of August.]B[pp];W[dd];B[dp];W[pd];B[cc];W[dc];B[cd];W[de];B[cf];W[nq](;B[bg];W[qn];B[pn];W[pm];B[on];W[qp];B[qq];W[qo];B[pq];W[kq];C[A popular modern joseki in the lower-right corner.]B[pk];W[om];B[lp];W[lq];B[np];W[ql];B[mp];W[or];B[qk];W[qg];B[nm];W[ol];B[ph];W[pg];B[nh];W[nl];B[mm];W[ml];B[ll](;W[lm]C[This cut was a mistake in direction of play: White created a weak group in the middle while his group on the right is not settled yet; at the same time, the black group running out from the lower-right corner is relatively strong.];B[kl];W[ln];B[mn];W[mo];B[nn];W[jm];B[kp];W[jo];C[A painful move for White. Black 47 and 49 along with with White 48 and White 20 form a shape called "completely split keima" - one of the worst shapes in the game.

Instead of White 48, it was better to draw back and sacrifice the stones in the middle, for example by playing at 49, but I understand that it's hard to do it once White 46 has been played.]B[jp];W[ir];FG[259:]PM[2];B[iq];W[jr];B[mj];W[oj]C[A strong resistance.](;B[qh];W[nj](;C[Black 57 is an important point of the shape for both sides, but allowing White to cut in the middle was painful.]B[og];W[io];B[hq];W[mi];B[go];W[jl];B[kj];W[lj]C[After this move, the White group on the right side is practically alive.];B[jk];W[ik](;B[ki];W[hl]C[Good shape for White. It's still a game, although Black is slightly ahead.];B[hc];W[eg];B[nc];W[nd]C[White splits the black groups trying to utilize their weakness - a good idea. This leads to a complicated struggle - the culmination of this game.];B[md];W[ne];B[oc](;W[mh];B[od];W[of];B[pf];W[ng];B[oh](;W[me];B[oe];W[ld];B[mc];W[le];B[nf];W[lc]C[White hopes to kill the whole upper side and center of the board, but there is too much space there - Black will live.];B[gg];W[ii];B[ig];W[ie];B[he];W[id];B[df];W[ef];B[fe](;W[cb];B[bb];W[eb];FG[259:]PM[2];B[ee];W[fh];B[fc];W[ba];C[Bruno resigned after 105 moves. It was a fierce fight and a well-deserved victory for Ho Yeung Woo 5d, the new British Champion!]B[bc])(;PM[2]MN[1]VW[aa:sk]FG[259:];W[ee];C[White needs to connect here, but Black 2 escapes and White has no chance of killing Black.]B[fh]))(;FG[259:]PM[2]MN[1];W[pe];B[qf];W[oe];B[kd];W[lf]C[White 82 in the game sacrificed the corner, but it was too big. It was better to play as in this diagram trying to attack the black group in the center of the board afterwards.])(;PM[2]MN[1]VW[aa:sk]FG[259:];W[qf];B[pe];W[qe];B[oe];W[nf];B[mg];W[mf];B[lg];W[lf];C[White goes all-in here, but a cut at Black 6 is too severe - White would not be able to survive both in the upper-right corner and with the group Black has just cut off.]B[kf]))(;FG[259:]PM[2]MN[1];W[me];B[ld];W[le];B[kd];W[mh]C[White 76 in the game was a careless move - it's hard to respond Black's next move. It was better to push on the upper side as in this diagram and then seal in the black group on the right with White 5. Black would probably need to live on the right side with a combination like A - B - C and White can attack the black group in the middle with D. This was White's chance to seize the initiative in this game.]LB[rg:A][rf:B][ri:C][jf:D]))(;FG[259:]PM[2]MN[1];B[ij];W[hk];B[hj];W[gk]C[Since the white group on the right is settled, it would be better to put pressure on the other white group in the center instead of extending at Black 67 in the game. Black might still consider striking the vital point of White's shape at A after White 4.]LB[hm:A]))(;VW[ia:ss]FG[259:]PM[2];C[This connection looks like a proper move in this position - this way, the black stones in the middle remain linked up and Black can still utilize the weakness of the white group on the right side. The ladder starting with A - B works for Black.]LB[mi:A][li:B]B[ni])(;PM[2]MN[1]VW[ia:ss]FG[259:];B[mi];W[oh];B[oi];W[og]C[This connection looks more solid, but allows White to split Black - A and B are miai.]LB[ni:A][pi:B]))(;PM[2]MN[1]VW[ia:ss]FG[259:];C[ ]B[ok];W[nj];B[nk];W[mk];B[lj];W[pi]C[Black would like to cut off the white stone here, but White 6 separates the four black stones on the right. Since there is also a cutting point at A, this fight is promising for White.]LB[lk:A]))(;FG[259:]PM[2]MN[1];W[lk];B[kl];W[og];B[nj];W[mj];B[mi];W[kk]C[Alternative to White 40 in the game - a struggle of the running groups.]))(;FG[257:Figure ]GOWRITEFG[mergeTitleRange]PM[2];B[qn];PM[2]MN[1]VW[aa:fi]FG[259:];W[ce];B[be];W[bd];B[bc];W[bf];B[ad];TR[nq]W[cg]C[White 10 in the game prepared the conditions for this ladder.]))(;GM[1]FF[4]SO[bgj 207]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]AB[rp][qp][po][oo][no][np][mq][oq]AW[op][pp][pq][or][lq][lp][qo][qn][pn][on][nn]C[page 35
journal problem 3

Black to play and live all.]GN[35 - problem 3](;B[nq]C[If Black connects White can play  to capture the two stones on the right.];W[qq];B[rq];W[rr])(;B[pr]C[This is the correct play starting a spiral ladder.](;W[qq];B[qr];W[rq];B[rr](;W[nq];B[sq];W[oq](;B[os];W[nr];B[mr])(;B[nr];W[os];B[ns]))(;W[sq]C[However far White plays it changes nothing.];B[sp];W[nq];B[sr]))(;W[nq]C[Capturing here just makes the ladder shorter.];B[qq];W[oq];B[nr])))(;GM[1]FF[4]SO[bgj 207]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]C[page 38
journal problem 5

Black to play and rescue the three black stones.]AB[qq][qp][pp][op][nq][mq][nr][no][on][ln][jn][io][iq][jr][ip]AW[rp][rq][ro][qn][qr][pq][oq][or][np][mp][lp][kp][lr]GN[38 - problem 5](;B[lq]C[Clearly Black cannot start here.];W[kq];B[kr];W[mr])(;B[os]C[This doesn't help as Black still has insufficient liberties.];W[pr];B[rr];W[rs];B[lq];W[kq];B[kr];W[ms])(;B[ns]C[This is the correct first play, threatening to capture the stones to the right.](;W[os]C[Mistake by White.];B[ps];W[pr];B[rr];W[qs];B[rs])(;W[pr](;B[lq]C[This still doesn't work for Black.];W[kq];B[kr];W[ms])(;B[ks]C[This is the correct next play.];W[ls];B[lq];W[kq];B[kr]C[Now the cut works leaving a temporary seki if White plays to the right of 1. However the five white stones in the middle are dead and the seki is broken.]))))(;GM[1]FF[4]SO[bgj 207]AP[Sabaki:0.52.2]SZ[19]CA[UTF-8]AB[rs][rr][rq][qp][qo][po][mo][mn][lp][kp][kq][kr][ls][ir][pq][or][mq]AW[ms][mr][lr][lq][mp][np][op][pp][qq][qr][pr][os]C[page 37
journal problem 4

Black to play and kill.]GN[37 - problem 4](;B[oq]C[Black cannot make a killing shape by playing inside the white group.];W[nq])(;B[qs]C[Playing here does not work either.];W[oq];B[ps];W[nr])(;B[ps]C[This is the correct first play. If white takes this stone it is a snapback on four white stones.];W[oq];B[ns]L[nr][qs]C[Black takes here and now White playing either A or B is self-atari. White is dead.]))