(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.00]
PW[kata1-b40c256-s9576084992-d2331461471]PB[kata1-b60c320-s6042914816-d2879200871]C[startTurnIdx=0,initTurnNum=0,gameHash=4F920BA647A1DD5E9A89955087B27CD3,gtype=normal

20220606

Daniel Hu 6d
A combination tends to be heavy, though it starts with probes. It tends to secure the boundaries of a valuable area without leaving easy valuable ways for the opponent to enter.]RE[B+Resign]
;B[dp]C[0.48 0.52 0.00 -0.4 v=600]
;W[pd]C[0.48 0.52 0.00 -0.4 v=600]
;B[dd]C[0.48 0.52 0.00 -0.4 v=634]
;W[pp]C[0.47 0.53 0.00 -0.4 v=661]
;B[nq]C[0.48 0.52 0.00 -0.4 v=718]
(;W[cc]C[0.47 0.53 0.00 -0.4 v=701

more recent katago's have started to think this is suboptimal (perhaps it is reaching alphago master level?)

The 3-3 is good for reducing the opponent's area since if B tries to keep their area, W gets good local potential on the top. As W is alive, this potential is less affected by B strength.]
(;B[dc]C[0.48 0.52 0.00 -0.4 v=666

It is more important for B to ensure that W's living groups have less moyo potential in this opening. At the moment B's moyo is too open to make.

The cost is that this B group will be vulnerable to attack, but B can use their initiative to minimise the damage.

This is the meaning of opening fighting.

B doesn't block for their own side and try to attack difficult but instead asks W to attack B. As it takes 4 stones to capture 1, this isn't easy.]
;W[cd]C[0.47 0.53 0.00 -0.4 v=765]
(;B[de]C[0.48 0.52 0.00 -0.4 v=1151]
(;W[bf]C[0.47 0.53 0.00 -0.4 v=1264

This is faster for getting into the left, but leaves some corner weaknesses.

Primarily B has B15 and C14 aji, but W has a choice of direction and can try to make B pay more to cut.

But with this aji and looseness (a cutting point), it is probably slightly harder to attack the whole B group.

The left is valuable right now especially as B has a moyo below.]
(;B[qn]C[0.48 0.52 0.00 -0.4 v=1433

The key point for the open lower side.

Playing on the top helps B's group, but lets W settle and hence risks being counter-attacked as the space is still very open.

Both sides think the upper side is more settled and hence less important. It takes too many moves to change the situation although it is still valuable to attack B's life and death. But the corner also has problems.

Both sides are more careful on the upper side as aji can be bad direction. At this level a fraction of a point can lose the game.

In the lower right, the size of potential mistakes is larger. ]
(;W[pn]C[0.47 0.53 0.00 -0.5 v=1100

Even this decision is difficult with big percentage point changes locally for different standard joseki.

This is aiming at playing C3, and W getting alive on the lower left can help attack D15 so that W can play on the top to push B towards the left where neither side had much territory but W already has a living group which can develop from attacking.

Getting a solid wall means that the bottom side remains open even after this strategy. It leaves options open for a W invasion say at D3.

For the time being W has a cut at Q5, but W can naturally lean on R6 while taking the corner at the same time in order to defend and O3 remains slightly too weak to cut.

Again B getting stronger on the right has limited local potential as W can also get strong locally. However, this ensures B finds it hard to get strong with O3, so that W still has many options and space (and hence eyespace) on the lower side.]
;B[pm]C[0.47 0.53 0.00 -0.4 v=808]
;W[on]C[0.47 0.53 0.00 -0.4 v=1031]
(;B[qp]C[0.48 0.52 0.00 -0.4 v=1387]
;W[qq]C[0.47 0.53 0.00 -0.5 v=1528]
;B[qo]C[0.48 0.52 0.00 -0.4 v=1928]
(;W[pq]C[0.47 0.53 0.00 -0.5 v=2045]
(;B[lq]C[0.48 0.52 0.00 -0.4 v=2301]
(;W[kp]C[0.47 0.53 0.00 -0.6 v=1551

-2%
 
There are many options but D3 stands out. It thinks this is too crude.

Basically W has enough space to get out, so reducing the lower side is more important as B is weak there. with B14 support.

This gets more strength locally but risks being cut at Q5, so another move is really needed.

This would be better if W was trying to attack Q7, but that is too far away when M3 is solid and D15 too.]
(;B[lp]C[0.47 0.53 0.00 -0.5 v=847

-3%

worst locally.

not valuable as it isn't threatening Q5 tightly enough (so O3 will still be damaged)

which means that W still has attack on the right (as B R9 is less powerful), as well as pressure on the lower side.]
(;W[ko]C[0.47 0.53 0.00 -0.6 v=744

-5

perhaps there is no point unless W plays tightly trying to connect]
(;B[mn]C[0.47 0.53 0.00 -0.5 v=946

only move to cut but it works]
(;W[mm]C[0.47 0.53 0.00 -0.6 v=1147

-0.5%

if W can't connect nor counterattack, then this isn't valuable.

W still has the Q5 and P7 cut before Q7 can be attacked.

B is out at M6 and L3 and P2 remains severe, so this B group is also good.]
(;B[ln]C[0.47 0.53 0.00 -0.6 v=971]
(;W[np]C[0.48 0.52 0.00 -0.4 v=974]
;B[mp]C[0.46 0.54 0.00 -0.7 v=1208]
(;W[om]C[0.48 0.52 0.00 -0.5 v=1382

The problem is that N7 is pushing from behind.

W is trying to make B overconcentrated, but the result is that W is split into two weak groups.

while W needs at least 2 moves to connect with L5.

B probably needs 3 moves to seal in R3 but if so, then the group is only ko for life.]
;B[pl]C[0.46 0.54 0.00 -0.8 v=1301]
(;W[rl]C[0.48 0.52 0.00 -0.5 v=1543

very valuable when W is weak but close to alive locally and L5 is light.]
(;B[rm]C[0.46 0.54 0.00 -0.7 v=1360]
(;W[ql]C[0.49 0.51 0.00 -0.3 v=921

-3%

This loses some liberties so that B doesn't necessarily need to defend yet. Since W had R9 instead for shape especially if B plays R10 at some point.

Ah, I see now. B getting strong here threatens T2. and makes W's S4 defence less valuable.]
;B[qm]C[0.43 0.57 0.00 -1.2 v=675]
(;W[qj]C[0.45 0.55 0.00 -0.9 v=936]
(;B[pj]C[0.43 0.57 0.00 -1.3 v=1178

-1% (but it changes its mind to the best after more reading)

leaning on a weak group. But it doesn't leave a cut.]
(;W[pi]C[0.44 0.56 0.00 -1.1 v=1263]
(;B[oj]C[0.43 0.57 0.00 -1.3 v=886]
(;W[qi]C[0.44 0.56 0.00 -1.2 v=1080

preventing B's semi sentes at P9 and Q9 and even P11]
(;B[mk]C[0.43 0.57 0.00 -1.3 v=1227]
(;W[nr]C[0.44 0.56 0.00 -1.3 v=1288]
(;B[mr]C[0.43 0.57 0.00 -1.5 v=1070

The main shape result is that although L5 isn't great, M4 is even worse. However the points and whole board result is that B has connected two weak groups and W is struggling to live in the corner.

Although W gets this valuable point that makes B's shape look silly, it does help B get J3 later further weakening L4.]
;W[or]C[0.43 0.57 0.00 -1.4 v=734]
(;B[lm]C[0.42 0.58 0.00 -1.6 v=1210]
(;W[nh]C[0.41 0.59 0.00 -2.0 v=695

trying to get a valuable point before defending.

B still has some cutting points and no easy way for to attack W as T2 is very negative for territory and B's own eyespace if it doesn't work and W has some eyes with P9 N8 etc even if W doesn't cut.]
;B[op]C[0.40 0.60 0.00 -2.1 v=847]
;W[po]C[0.39 0.61 0.00 -2.3 v=714]
(;B[mi]C[0.40 0.60 0.00 -2.1 v=1169

-3%

"bad" as B had many different sente moves here so W's upper right was weaker than it is now as B still has a cutting point.

However the main line is the same so it is probably more about trying to trick W.]
;W[ol]C[0.40 0.60 0.00 -2.4 v=810]
(;B[ok]C[0.41 0.59 0.00 -2.0 v=1173]
(;W[qk]C[0.41 0.59 0.00 -1.9 v=900]
;B[pk]C[0.41 0.59 0.00 -1.6 v=952]
;W[rp]C[0.42 0.58 0.00 -1.5 v=1163]
(;B[gp]C[0.42 0.58 0.00 -1.4 v=1443]
(;W[oc]C[0.42 0.58 0.00 -1.5 v=1442]
;B[nd]C[0.43 0.57 0.00 -1.3 v=1120]
;W[lg]C[0.42 0.58 0.00 -1.6 v=919]
;B[nc]C[0.42 0.58 0.00 -1.6 v=628]
;W[kd]C[0.41 0.59 0.00 -1.7 v=666]
;B[of]C[0.44 0.56 0.00 -1.1 v=779]
;W[qf]C[0.46 0.54 0.00 -0.9 v=608]
;B[mh]C[0.45 0.55 0.00 -1.1 v=780]
;W[mg]C[0.44 0.56 0.00 -1.2 v=864]
;B[ng]C[0.43 0.57 0.00 -1.4 v=1071]
;W[oh]C[0.42 0.58 0.00 -1.6 v=1378]
;B[le]C[0.42 0.58 0.00 -1.4 v=1447]
;W[ld]C[0.44 0.56 0.00 -1.2 v=840]
;B[me]C[0.43 0.57 0.00 -1.3 v=1580]
;W[jf]C[0.44 0.56 0.00 -1.1 v=1019]
;B[ke]C[0.43 0.57 0.00 -1.3 v=1843]
;W[je]C[0.43 0.57 0.00 -1.2 v=1413]
;B[jd]C[0.42 0.58 0.00 -1.5 v=2273]
;W[id]C[0.43 0.57 0.00 -1.2 v=1945]
;B[jc]C[0.41 0.59 0.00 -1.5 v=2696]
;W[ic]C[0.43 0.57 0.00 -1.3 v=2451]
;B[jb]C[0.41 0.59 0.00 -1.6 v=3259]
;W[ib]C[0.42 0.58 0.00 -1.3 v=2625]
;B[lc]C[0.41 0.59 0.00 -1.5 v=3492]
;W[gf]C[0.42 0.58 0.00 -1.3 v=2872]
;B[fg]C[0.42 0.58 0.00 -1.5 v=2790]
;W[dg]C[0.41 0.59 0.00 -1.5 v=1370]
;B[ff]C[0.39 0.61 0.00 -1.8 v=781]
;W[gg]C[0.39 0.61 0.00 -1.9 v=679]
;B[cb]C[0.39 0.61 0.00 -2.0 v=978]
;W[bb]C[0.37 0.63 0.00 -2.4 v=779]
;B[be]C[0.38 0.62 0.00 -2.1 v=1099]
;W[db]C[0.37 0.63 0.00 -2.4 v=920]
;B[ce]C[0.39 0.61 0.00 -2.0 v=1080]
;W[fe]C[0.38 0.62 0.00 -2.3 v=1159]
;B[eb]C[0.39 0.61 0.00 -2.0 v=1366]
;W[ca]C[0.39 0.61 0.00 -2.2 v=670]
;B[fh]C[0.40 0.60 0.00 -1.9 v=992]
;W[ef]C[0.38 0.62 0.00 -2.4 v=1223]
;B[ee]C[0.37 0.63 0.00 -2.4 v=774]
;W[ch]C[0.37 0.63 0.00 -2.8 v=1004]
;B[gh]C[0.34 0.66 0.00 -3.3 v=740]
;W[fd]C[0.35 0.65 0.00 -3.3 v=642]
;B[dj]C[0.32 0.68 0.00 -3.9 v=871]
;W[cj]C[0.34 0.66 0.00 -3.6 v=1016]
;B[ck]C[0.31 0.69 0.00 -4.0 v=708]
;W[bk]C[0.35 0.65 0.00 -3.4 v=1244]
;B[bl]C[0.31 0.69 0.00 -4.0 v=934]
;W[bj]C[0.33 0.67 0.00 -3.8 v=607]
;B[cl]C[0.30 0.70 0.00 -4.2 v=1056]
;W[di]C[0.33 0.67 0.00 -3.8 v=1016]
;B[ej]C[0.28 0.72 0.00 -4.8 v=965]
;W[ih]C[0.32 0.68 0.00 -4.1 v=1088]
;B[ij]C[0.29 0.71 0.00 -4.5 v=1097]
;W[ki]C[0.31 0.69 0.00 -4.2 v=1047]
;B[bg]C[0.27 0.73 0.00 -4.9 v=828]
;W[bh]C[0.26 0.74 0.00 -5.3 v=739]
;B[cf]C[0.20 0.80 0.00 -6.8 v=840]
;W[cg]C[0.21 0.79 0.00 -6.9 v=894]
;B[af]C[0.17 0.83 0.00 -7.4 v=763]
;W[ei]C[0.18 0.82 0.00 -7.4 v=1001]
;B[fj]C[0.18 0.82 0.00 -7.2 v=1104]
;W[bd]C[0.19 0.81 0.00 -7.1 v=1454]
;B[fc]C[0.16 0.84 0.00 -7.4 v=1225]
;W[gb]C[0.19 0.81 0.00 -7.0 v=1455]
;B[kk]C[0.16 0.84 0.00 -7.6 v=1586]
;W[cq]C[0.17 0.83 0.00 -7.8 v=1022]
;B[er]C[0.13 0.87 0.00 -8.4 v=943]
;W[hj]C[0.17 0.83 0.00 -8.1 v=1060]
;B[ii]C[0.17 0.83 0.00 -7.8 v=684]
;W[cp]C[0.18 0.82 0.00 -8.4 v=1055]
;B[do]C[0.17 0.83 0.00 -7.9 v=941]
;W[bn]C[0.21 0.79 0.00 -7.2 v=602]
;B[eh]C[0.19 0.81 0.00 -7.0 v=719]
;W[ak]C[0.28 0.72 0.00 -6.3 v=869]
;B[bm]C[0.23 0.77 0.00 -6.2 v=1179]
;W[cn]C[0.27 0.73 0.00 -7.3 v=1372]
;B[ai]C[0.13 0.87 0.00 -10.5 v=637]
;W[ah]C[0.23 0.77 0.00 -7.1 v=1247]
;B[em]C[0.20 0.80 0.00 -7.9 v=1123]
;W[lj]C[0.17 0.83 0.00 -8.2 v=1144]
;B[lk]C[0.14 0.86 0.00 -8.1 v=652]
;W[dm]C[0.15 0.85 0.00 -8.8 v=919]
;B[el]C[0.13 0.87 0.00 -8.5 v=678]
;W[mj]C[0.13 0.87 0.00 -9.0 v=856]
;B[nj]C[0.13 0.87 0.00 -8.2 v=880]
;W[dr]C[0.15 0.85 0.00 -8.4 v=650]
;B[bi]C[0.11 0.89 0.00 -8.4 v=882]
;W[ec]C[0.12 0.88 0.00 -8.9 v=862]
;B[eg]C[0.08 0.92 0.00 -9.9 v=825]
;W[df]C[0.09 0.91 0.00 -11.2 v=614]
;B[ed]C[0.06 0.94 0.00 -10.8 v=1021]
;W[ad]C[0.11 0.89 0.00 -9.9 v=1179]
;B[gc]C[0.05 0.95 0.00 -14.3 v=755]
;W[gd]C[0.13 0.87 0.00 -9.5 v=981]
;B[hd]C[0.10 0.90 0.00 -10.9 v=1024]
;W[ge]C[0.12 0.88 0.00 -9.7 v=1231]
;B[he]C[0.11 0.89 0.00 -10.2 v=1145]
;W[hf]C[0.11 0.89 0.00 -10.0 v=1598]
;B[if]C[0.10 0.90 0.00 -9.4 v=1173]
;W[hg]C[0.14 0.86 0.00 -8.4 v=794]
;B[hh]C[0.09 0.91 0.00 -9.5 v=1150]
;W[ig]C[0.10 0.90 0.00 -9.4 v=610]
;B[ae]C[0.08 0.92 0.00 -9.7 v=1371]
;W[ag]C[0.09 0.91 0.00 -9.7 v=1194]
;B[dh]C[0.08 0.92 0.00 -9.6 v=1731]
;W[bf]C[0.08 0.92 0.00 -10.2 v=1366]
;B[ec]C[0.07 0.93 0.00 -9.9 v=1710]
;W[ci]C[0.07 0.93 0.00 -10.6 v=1536]
;B[al]C[0.07 0.93 0.00 -9.8 v=716]
;W[fr]C[0.06 0.94 0.00 -11.0 v=695]
;B[hc]C[0.05 0.95 0.00 -9.5 v=609]
;W[ie]C[0.05 0.95 0.00 -10.9 v=612]
;B[eq]C[0.03 0.97 0.00 -9.9 v=805]
;C[0.04 0.96 0.00 -11.3 v=890 result=B+R])
(;W[hm]
;B[nc]
;W[cg]
;B[hk]
;W[oc]
;B[nd]
;W[pf]
;B[of]
;W[hp]
;B[ho]
;W[go]
;B[fp]
;W[io]))
(;B[fp]
;W[hq]
;B[hp]
;W[gp]
;B[go]
;W[gq]
;B[fq]
;W[ho]
;B[ip]
;W[fr]
;B[er]
;W[gr]
;B[io]
;W[eq]
;B[ep]
;W[dq]
;B[cq]))
(;W[ml]
;B[ll]
;W[lk]
;B[lj]
;W[kk]
;B[gp]
;W[il]
;B[ji]
;W[ij]
;B[ii]
;W[iq]
;B[jn]
;W[hp]
;B[hn]))
(;B[pk]C[-2%]
;W[rp]
;B[gp]
;W[cg]
;B[lg]
;W[oc]
;B[gl]
;W[fq]
;B[gq]
;W[fp]
;B[go]
;W[fo]
;B[cq]
;W[gn]
;B[fn]
;W[en]
;B[fm]
;W[gr]
;B[hr]
;W[er]
;B[gs]
;W[fr]
;B[hn]
;W[do]))
(;B[gp]
;W[oc]))
(;W[rp]
;B[op]
;W[po]
;B[gp]
;W[nh]
;B[qc]
;W[ol]
;B[ok]
;W[qk]
;B[pk]
;W[qd]
;B[pc]
;W[nc]
;B[oc]
;W[nd]
;B[od]
;W[oe]
;B[rd]
;W[re]
;B[ne]
;W[of]
;B[nf]
;W[ng]
;B[rc]
;W[ml]
;B[ll]
;W[lk]))
(;B[op]
;W[po]
;B[lm]
;W[nh]
;B[gp]
;W[oc]
;B[mi]
;W[rp]
;B[mh]
;W[cg]
;B[gl]
;W[ol]
;B[pk]
;W[nf]
;B[co]
;W[hd]
;B[mf]
;W[eq]
;B[dq]
;W[dr]
;B[cr]
;W[gq]
;B[hq]
;W[hp]
;B[iq])
(;B[ol]
;W[rp]
;B[qg]
;W[qf]
;B[pf]
;W[rf]
;B[pe]
;W[qd]
;B[nh]
;W[md]
;B[od]
;W[pg]
;B[ph]
;W[og]
;B[oh]
;W[qh]
;B[ng]
;W[rg]
;B[pc]
;W[fq]
;B[hq]
;W[go]
;B[eq]
;W[gq]))
(;B[op]
;W[po]
;B[mr]
;W[nh]
;B[mi]
;W[or]
;B[gp]
;W[oc]
;B[cg]
;W[lg]
;B[lm]
;W[cn])
(;B[or]
;W[oq]
;B[mr]
;W[mq]
;B[cf]
;W[nq]
;B[be]
;W[ol]
;B[ok]
;W[fq]
;B[hq]
;W[fo]
;B[ho]
;W[dn]))
(;W[lk]
;B[ol]
;W[nl]
;B[lj]
;W[ll]
;B[kj]
;W[jm]
;B[pg]
;W[rg]
;B[qf]
;W[rf]
;B[jk]
;W[jl]
;B[qe]
;W[re]
;B[qd]
;W[kq]
;B[mr]
;W[or])
(;W[ol]
;B[ok]
;W[nr]
;B[mr]
;W[qk]
;B[pk]
;W[or]
;B[lm]
;W[rp]
;B[op]
;W[fq]
;B[eq]
;W[fp]
;B[dn]
;W[nc]
;B[iq]
;W[hp]
;B[fn]
;W[gn]
;B[fm]
;W[do]
;B[co])
(;W[lm]
;B[kn]
;W[km]
;B[jn]
;W[kk]
;B[nh]
;W[ol]
;B[ok]
;W[pf]
;B[eq]
;W[fp]
;B[en]
;W[hn]
;B[go]
;W[ho]
;B[il]))
(;B[ol]C[-10%]
;W[nl]
;B[mk]
;W[ll]
;B[nk]
;W[lm]
;B[kn]
;W[jl]
;B[jm]
;W[il]
;B[hn]
;W[fq]
;B[eq]
;W[fp]
;B[dn]
;W[em]
;B[gm])
(;B[oi]
;W[ol]
;B[pk]
;W[pg]
;B[lk]
;W[nr]
;B[mr]
;W[or]
;B[op]
;W[po]
;B[gp]
;W[cg]
;B[kl]
;W[hc]))
(;W[qh]
;B[oi]
;W[pf]
;B[lm]
;W[nr]
;B[mr]
;W[or]
;B[gp]
;W[jm]
;B[hm]
;W[cg]
;B[lk]
;W[rp])
(;W[ph]
;B[mk]
;W[nr]
;B[mr]
;W[or]
;B[lm]
;W[ol]
;B[pk]
;W[rp]))
(;B[ok]
;W[qh]
;B[oq]
;W[op]
;B[mk]
;W[lm]
;B[kn]
;W[nl]
;B[oi]
;W[oh]
;B[nh]
;W[ni]
;B[oj]
;W[mh]
;B[ng]
;W[mj]
;B[qk])
(;B[nk]
;W[pk]
;B[ol]
;W[oj]
;B[po]
;W[nr]
;B[mr]
;W[oo]
;B[nm]
;W[oq]
;B[qc]
;W[qd]
;B[pc]
;W[od]
;B[oc]
;W[nd]
;B[nc]
;W[mc]
;B[mb])
(;B[pk]
;W[qi]
;B[oi]
;W[oh]
;B[nh]
;W[ni]
;B[oj]
;W[og]
;B[oq]
;W[op]
;B[mi]
;W[ll]
;B[mk]
;W[ng]))
(;W[qi]
;B[pi]
;W[qg]
;B[ph]
;W[rf]
;B[mk]
;W[nr]
;B[mr]
;W[or]
;B[op]
;W[po]
;B[gp]
;W[hp]
;B[ho]
;W[gq]
;B[fq]
;W[hq]
;B[fp]
;W[io]))
(;B[pi]C[W is weak enough with Q4 that it is valuable to get a sente wall here, and the speed of the wall (despite weaknesses) likely means B can also get out with M6 which remains important as it isn't completely alive especially after W plays O2 (which also makes the J2/K2 eyespace point less valuable.]
;W[pj]
;B[oj]
;W[qi]
;B[ok]
;W[mj]
;B[ph]
;W[qh]
;B[pg]
;W[qg]
;B[pe]
;W[qe]
;B[oe]
;W[pf]
;B[of]
;W[qf]
;B[od]
;W[pc]
;B[mh]
;W[gp]
;B[eq]
;W[nr]
;B[mr]
;W[or]
;B[iq]
;W[fq]
;B[hq]
;W[en]
;B[cn]
;W[er]
;B[dr]
;W[ep]
;B[dq]
;W[io]
;B[kl]
;W[hm])
(;B[nk]
;W[pi]
;B[pk]
;W[ml]
;B[oi]
;W[oh]
;B[ni]
;W[kl]
;B[km]
;W[jm]
;B[jl]
;W[kk]
;B[mk]C[defending the M3 group as playing either K6 or K2 isn't very valuable.

B wants P2, but W is too cleanly alive and B was far from dead.]
;W[nr]
;B[mr]
;W[or]
;B[nm]C[trying to cut through]
;W[im]
;B[jj]
;W[rp]C[this seems to only prevent ko unless I'm missing something. perhaps T2 was the threat?]
;B[il]
;W[hm]
;B[hp]
;W[gp]
;B[go]
;W[fo]
;B[gn]
;W[hq]
;B[gq])
(;B[ok]C[not shape as W has P9 aji and B needs to play Q9 which isn't a good threat.

Mostly it doesn't work with B's threat at Q10.]
;W[lk]C[cute shape to run fast next to B's thickness and threaten to connect with L5.]
;B[mk]C[key point to still threaten the cut from the more valuable direction]
;W[ml]
;B[lj]
;W[pi]C[ensuring B can't play Q10 comfortably while still not depending on the P8 forcing move, and allowing Q9 forcing later.]
;B[mj]
;W[kl]
;B[jm]
;W[kj]
;B[ki]
;W[jj]
;B[ji]
;W[ij]
;B[ii]
;W[hj]
;B[pf]))
(;W[qi]
;B[qj]
;W[rj]
;B[pk]
;W[pi]
;B[nk]
;W[lk]
;B[kn]
;W[ll]
;B[mi]
;W[fq]
;B[pf]
;W[og]
;B[of]
;W[ng]))
(;W[qi]
;B[pj]
;W[pi]
;B[rk]
;W[rj]
;B[ql]
;W[fq]
;B[hq]
;W[go]
;B[qc]
;W[qd]
;B[pc]
;W[od]
;B[oc]
;W[nc]
;B[nb]
;W[dn]
;B[cn]
;W[cq]
;B[dq]
;W[cp]
;B[do]
;W[co])
(;W[qj]
;B[rk]
;W[fq]
;B[oq]
;W[cn]
;B[dn]
;W[dm]
;B[en]
;W[co]
;B[cp]
;W[kq]
;B[po]
;W[dr]
;B[hp]
;W[gp]
;B[go]))
(;B[qj]C[-5%]
;W[qm]
;B[rk]
;W[pk]
;B[qk]
;W[rn]
;B[rm]
;W[sm]
;B[ql]
;W[dq]
;B[eq]
;W[cq]
;B[fp]
;W[cp]
;B[do]
;W[bn]
;B[jm]
;W[gq]
;B[dr]
;W[gp]
;B[jr]
;W[hn]))
(;W[fq]
;B[oq]C[This is a combination to secure the boundary. It is heavy shape but that it the whole point.

If there is a valuable area to secure, then it is good to probe or make exchanges at the boundary (as long as they are actually sente).

Otherwise this can damage B's aji as P2 and P4 is sometimes a better combination.

For example, after this move, W can live fairly cleanly with P2 and S2 tesujis (though very small).]
;W[po]
;B[ir]C[faster as N4 is thicker]
;W[cn]
;B[fo]
;W[jr]
;B[jq]
;W[iq]
;B[kr]
;W[cq]
;B[dq]
;W[dr]
;B[cp]
;W[hr]
;B[js]
;W[br]
;B[bq]
;W[cr]
;B[qf]
;W[em]
;B[nc]
;W[pf]
;B[pg]
;W[of]
;B[qe]
;W[qd]
;B[og]
;W[kd]
;B[md]
;W[ng])
(;W[qj]
;B[pj]
;W[rl]
;B[rm]
;W[pi]
;B[oj]
;W[qh]
;B[oi]
;W[pf]
;B[gp]
;W[mj]
;B[rk]
;W[qk]
;B[ql]
;W[or]
;B[ph]
;W[qi]
;B[ol]
;W[cg]
;B[nr]))
(;W[pk]
;B[om]
;W[nm]C[B has the ladder but perhaps P8 is W's threat though the R7 cut and squeeze isn't bad either]
;B[ok]
;W[oj]
;B[nk]
;W[nn]
;B[rl]
;W[jm]
;B[lm]
;W[mk]
;B[nj]
;W[ll]
;B[kl]
;W[km]
;B[ir]
;W[iq]
;B[jq]
;W[hr]
;B[jr]
;W[ip]
;B[gq]
;W[hq]
;B[or]
;W[ik]
;B[qf]
;W[kk]
;B[of]
;W[cn]))
(;W[om]
;B[pl]
;W[np]
;B[mp]
;W[fq]
;B[oq]
;W[po]
;B[jr]
;W[cn]
;B[fo]
;W[iq]
;B[er]
;W[jq]
;B[ir]
;W[hr]
;B[kq]))
(;B[om]
;W[nn]
;B[ln]
;W[nm]
;B[qk]
;W[kq]
;B[kn]
;W[np]
;B[mp]
;W[fq]
;B[kl]
;W[cn]
;B[dn]
;W[dm]
;B[en]
;W[co]
;B[cp]
;W[hp]
;B[eq]))
(;W[om]C[This at least allows the key L3 move.]
;B[pl]
;W[kq]
;B[or]
;W[lo]
;B[mo]
;W[np]
;B[mp]
;W[ol]
;B[pk]
;W[lm]
;B[mm]
;W[ok]
;B[pj]
;W[ll]
;B[ml]
;W[mk]
;B[ln]
;W[kn]
;B[lk]
;W[mj]
;B[mr]
;W[jl]
;B[pf]
;W[nd]
;B[md]
;W[me]
;B[nc]
;W[ne]
;B[oc]
;W[ld]
;B[mc]
;W[pc])
(;W[np]
;B[lo]
;W[km]
;B[lm]
;W[nl]
;B[qk]
;W[kl]
;B[oq]
;W[nn]
;B[mk]
;W[kq]
;B[nk]
;W[ok]
;B[oj]
;W[ol])
(;W[kq]
;B[po]
;W[oo]
;B[op]
;W[or]
;B[nr]
;W[om]
;B[ol]
;W[nm]
;B[pl]
;W[nl]
;B[oq]
;W[rp]
;B[ro]
;W[pr]
;B[rq]
;W[rr]
;B[sp]
;W[sr]
;B[lm]
;W[nk]
;B[pj]
;W[lk]
;B[kl]
;W[kk]))
(;B[lo]
;W[ln]
;B[jr]
;W[mn]))
(;W[lo]
(;B[ko]
;W[kq]
;B[jo]
;W[lr]
;B[mo]
;W[ln]
;B[mn]
;W[qm]
;B[rm]
;W[lm]
;B[mm]
;W[ql]
;B[rl]
;W[qk]
;B[rk]
;W[ll]
;B[ml]
;W[qj]
;B[mr]
;W[po]
;B[rq]
;W[mp]
;B[mq]
;W[np]
;B[lk]
;W[jl]
;B[no]
;W[op])
(;B[mo]
;W[ln]
;B[kq]
;W[jp]
;B[iq]
;W[mn]
;B[qk]
;W[hc]
;B[jc]
;W[he]
;B[mc]
;W[oc]
;B[je]
;W[hg]
;B[eh]
;W[cg]
;B[dg]
;W[ch]
;B[qf]
;W[re]
;B[cn])
(;B[kq]
;W[jp]
;B[mo]
;W[mn]
;B[ln]
;W[ko]
;B[nn]
;W[mm]
;B[no]
;W[om]
;B[nm]
;W[ol]
;B[qk]
;W[nl]
;B[jq]
;W[ip]
;B[ml]
;W[lm]
;B[mk]
;W[kl]
;B[oj]
;W[po]
;B[pj]
;W[rp]
;B[qf]
;W[ql]
;B[rl]
;W[rm]
;B[qm]
;W[pl]
;B[rn]
;W[nk]
;B[nj]
;W[mj]
;B[lk]
;W[mi])))
(;B[kq]C[This helps W get into the lower side, but instead transfers power to getting N4 in sente, and hence getting R9 in sente too.

Again, B maintains an attack on Q4 and still tries to maintain the local value of D4 (it is unlikely for W to invade C3 now).]
;W[ip]
;B[ko]
;W[lp]
;B[jp]
;W[jo]
;B[jq]
;W[kn]
;B[io]
;W[lo]
;B[in]
;W[qk]
;B[rl]
;W[np]
;B[rk]
;W[cg]
;B[eq]
;W[cn]
;B[dn]
;W[dm]
;B[en]
;W[ic]
;B[dg]
;W[qi]
;B[cf]
;W[ch]
;B[be]
;W[ce]
;B[df]
;W[bd]
;B[pc]
;W[qc]
;B[oc]
;W[qb]
;B[kc]
;W[rj]
;B[je])
(;B[om]
;W[mn]
;B[kq]
;W[jp]
;B[iq]
;W[qf]
;B[co]
;W[ic]
;B[ip]
;W[cg]
;B[in]
;W[gc]
;B[fg]
;W[eg]
;B[cb]
;W[bb]
;B[eb]
;W[ff])
(;B[cf]
;W[bg]
;B[kq])
(;B[mo]
;W[om]
;B[pl]
;W[mm]
;B[kq]
;W[qj]
;B[pj]
;W[pi]
;B[oj]
;W[qk]
;B[ol]
;W[qf]
;B[ll]
;W[po]
;B[lm]
;W[qm]
;B[ql]
;W[rm]
;B[rl]
;W[rn]
;B[cb]
;W[ip]
;B[gp]
;W[hn]
;B[hl]))
(;W[dq]
;B[cq]C[keeping up the attack as B has good double attack potential locally and the lower side is very open next to P6 so it is slow trying to make it territory.]
;W[eq]
;B[cr]
;W[jq]
;B[mn]
;W[mm]
;B[lm]C[most pressure for a double attack as B is solid enough to do so.]
;W[ml]
;B[om]
;W[nn]
;B[ln]
;W[nm]
;B[qk]
;W[gq]
(;B[ll]
;W[mj]
;B[po]
;W[oo]
;B[op]
;W[lk]
;B[or]
;W[rp]
;B[ro]
;W[pr]
;B[np]
;W[rr]
;B[sp]
;W[sq]
;B[rq]
;W[cp]
;B[sr]
;W[bp])
(;B[kk]
;W[mj]
;B[pc]
;W[oc]
;B[qc]
;W[ob]
;B[qd]
;W[pe]
;B[rf]
;W[pj]
;B[qj]
;W[qg]
;B[kc]
;W[qf]
;B[re]
;W[pk]
;B[qi]
;W[ic]
;B[ke]
;W[ie]))
(;W[hc]
;B[jc]
;W[he]
;B[nc]
;W[gg]
;B[eh]
;W[lc]
;B[ne]
;W[qg]
;B[je]
;W[le]
;B[jg]
;W[jb]
;B[ib]
;W[ic]
;B[kb]
;W[jd])
(;W[jc]
;B[ln]
;W[cg]
;B[hc]
;W[np]
;B[mp]
;W[nr]
;B[no]
;W[mr]
;B[po]
;W[qg]
;B[nc]
;W[pb]
;B[lc]
;W[hd]
;B[ic]
;W[id])
(;W[ic]
;B[pc]
;W[qc]
;B[oc]
;W[qb]
;B[kc]
;W[ie]
;B[ke]
;W[cg]
;B[mn]
;W[np]
;B[mp]
;W[nr]
;B[mr]
;W[oq]
;B[dg]
;W[mq]
;B[cf]
;W[bg])
(;W[cg]
;B[nc]
;W[mn]
;B[jp]
;W[ic]
;B[pf]
;W[of]
;B[og]
;W[nf]
;B[ql]
;W[oc]
;B[nd]
;W[pe]
;B[qf]
;W[ng]
;B[oh]
;W[nh]
;B[oi]
;W[re]
;B[kc]
;W[je])
(;W[qf]
;B[or]
;W[lo]
;B[po]
;W[oo]
;B[op]
;W[qm]
;B[rm]
;W[ql]
;B[rl]
;W[qk]
;B[rq]
;W[jc]
;B[cf]
;W[bg]
;B[hc]
;W[ol]
;B[ob]
;W[pc]
;B[lc]
;W[hd]
;B[gd]
;W[ke]
;B[le]
;W[lf]
;B[me]
;W[he]
;B[mf]
;W[lg]
;B[mg]
;W[lh]
;B[ge]
;W[gf]
;B[hf]
;W[je])
(;W[fq]C[several 4th line moves better than this on the top]
;B[or]
;W[lo]
;B[jq]
;W[np]
;B[ql]
;W[om]
;B[ol]
;W[nl]
;B[ok]
;W[nk]
;B[nj]
;W[oj]
;B[qj]
;W[cn]
;B[fo]
;W[cq]
;B[dq]
;W[dr]
;B[cp]
;W[br]
;B[bq]
;W[cr]
;B[mj]
;W[pj]
;B[pk])
(;W[jq]
;B[mn]
;W[nl]C[K3 is even more vulnerable now, so W doesn't want to make B more solid here]
;B[po]
;W[oo]
;B[op]
;W[om]
;B[pl]
;W[nr]
;B[or]
;W[oq]
;B[np]
;W[mr]
;B[qr]C[!!

hard to think of, but it just makes W burn thinking time.]
;W[pr]
;B[rq]
;W[os]
;B[ko]
;W[nj]
;B[pi]
;W[kk]
;B[ip]
;W[rr]
;B[sr]
;W[qs]
;B[qf]
;W[kc]C[Here W should play O17 which aims at attacking R14.

Instead now if B goes into the corner, either W will get Q15 or R16 in sente, both valuable (working with O10 too). This is better than adding a move too early when B's corner follow up isn't yet connected to B's fairly heavy R14.

It is heavy not because it is weak (though it is still vulnerable to forcing moves) but because it is solid enough to be B's territory but is still open at the boundary to W's follow ups too. So it is valuable territorially for W to break this area, especially as a complete break in will re expose the weak points at R10 and S8.]
;B[cb]
;W[bb]
;B[be]))
(;B[mp]C[The human move has come back into favour.

The point is to surround W in since W needs to defend Q5 and then B is stronger locally on both sides.

Even if W plays P2, B connecting around the centre is still very big, though perhaps one move away from being possible. Because B has two weak groups. Although locally it is B's area of influence, W has more influence further away, so B wants to avoid being attacked on both sides by putting the most attacking pressure locally. After all, Q6 and Q3 are the tightest moves on B, so B needs to respond in kind by defending with the most efficient moves that also attack.]
;W[dq]
;B[cq]
;W[eq]
;B[cp]
;W[iq]
;B[mn]
;W[mm]
;B[ln]
;W[om]
;B[pl]
;W[ep]
;B[qf]
;W[en]
;B[dm]
;W[nc]
;B[oj]
;W[po]
;B[rd]
;W[lq]
;B[kl])
(;B[kq]C[This was more common with earlier versions ]
;W[pk]
;B[pl]
;W[lp]
;B[lq]
;W[qk]
;B[nl]
;W[np]
;B[ok]
;W[oj]
;B[nj]
;W[oi]
;B[kp]
;W[mk]
;B[nk]
;W[mp]
;B[oq]
;W[op]
;B[kn])
(;B[kp]
;W[mp]
;B[mq]
;W[np]
;B[lp]
;W[kr]C[W is too happy to reduce the lower side when B remains not alive (so P6 can also live).]
;B[lr]
;W[kq]
;B[lq]
;W[iq]
;B[fq]
;W[io]
;B[ln]
;W[mm]
;B[om]
;W[mn]
;B[lm]))
(;W[pr]C[also possible to just live]
;B[qf]
;W[op]
;B[om]
;W[nm]
;B[nl]
;W[mm]
;B[jq]
;W[ml]
;B[nk]
;W[pk]
;B[ql]
;W[qk]
;B[oi]
;W[ol]
;B[rl]
;W[qh]
;B[ph]
;W[pg]
;B[qi]
;W[qg]
;B[ri]
;W[dq]
;B[cq]
;W[eq]
;B[cr]
;W[hq]
;B[lq]
;W[fo]
;B[dn])
(;W[np]C[-3%

This is faster for moving to the lower side and living.

However W's local territory is much worse as W was already out in the centre so P6 is less efficient when D4 is B.

Also, B's territory on the lower side with D4 was already limited by B14 and P6, so this is breaking the moyo, but it is too far to take away D4's main potential.

W loses the potential to attack with Q9 which could strength Q16 too.]
;B[po]
;W[op]
;B[rq]
;W[pr]
;B[qr]
;W[pq]
;B[rr]
;W[lq]
;B[qc]C[This works much better when W has influence but B has potential on both the upper and right sides. As then B is guaranteed to get a large local territory and potential.]
;W[pc]
;B[qd]
;W[pe]
;B[qe]C[This keeps the pressure for more local territory.]
;W[qf]
;B[rf]
;W[rg]))
(;B[ro]C[much worse to try to take the eyespace slowly from S3 as W can take sente to counterattack if that happens.

This isn't about local territory when there is still the whole board to fight for.

B wants speed to get to O17 etc.

This is stronger for keeping W weak so P7 push is more powerful, but B's shape remains weak enough and far enough from O3 that cutting is correct but difficult.]))
(;W[np]
;B[mp]
;W[no]
;B[pq]
;W[qq]
;B[oq]
;W[pn]
;B[qc]
;W[qd]
;B[pc]
;W[od]
;B[nb]
;W[qm]
;B[op]
;W[oo]
;B[qp]
;W[po]
;B[qr]
;W[rq]
;B[rr]
;W[rp]
;B[ph]
;W[rc]
;B[ql]
;W[rm]
;B[rb]
;W[ob]
;B[oc])
(;W[on]C[This played for a counter-attack, keeping the shapes of both sides weak, but the cost is the P5 cutting point that can't easily be fixed any more even if B goes into the corner.

]
;B[ql]C[B keeps up the attack especially as B has potential on the upper side.]
;W[fq]C[This is whole reason for W to play P6, to make B play on a smaller side.]
;B[qf]
;W[nc]
;B[hq]))
(;B[qf]C[not bad but]
;W[qn]C[But B is the one with a weak group here.]
;B[nc]C[again, B is trying to a force a moyo while defending against W attacking D17, but it isn't that big yet and W has counterattack options since W has flexibility from influence to change the direction slightly, especially as there is a lot of space.

Part of the problem is that this helps prevent W playing around H17 to attack, but that point remains open from the centre, and such a W move is still valuable (say H15). Is B willing to respond H17 to that for only the 3rd line? Probably not, but then it remains a fight and D15 is still a weak group with both H15 and H17 quite important attacking points forcing B to spend moves running or living smaller).

It is important for W to keep O17 weak so that H17 is a double attack as W expects a fight (for B not to defend at H17).]
;W[pf]
;B[pg]
;W[of]
;B[qd]
;W[qc]
;B[qe]
;W[pb]
;B[kc]
;W[cq]
;B[dq]
;W[cp]
;B[do]
;W[bn]
;B[pq]
;W[qq]
;B[qr]
;W[oq]
;B[pr]
;W[op]
;B[or]
;W[qj]
;B[qi]
;W[ri]
;B[rh]
;W[pi])
(;B[nc]
;W[qf]))
(;W[ce]
;B[cf]
;W[bf]
;B[qn]
;W[on]
;B[ql]
;W[cq]
;B[dq]
;W[cp]
;B[do]
;W[bn]
;B[qf]
;W[ic]
;B[no]
;W[oq]
;B[nr]
;W[oo]
;B[nn]
;W[om]))
(;B[cf]C[This fight is very complicated when W has the ladder, so it isn't played without support (especially a 3-4 shimari).

This way around, B gets weak on the upper side, so normally B prefers to play this only with support on the upper side. This puts more pressure in order to be able to live in the left too locally.]
;W[bf]
(;B[nc]
;W[de]
;B[ce]
;W[be]
;B[cg]
;W[ee]
;B[db]
;W[ch])
(;B[cb]
;W[cg]
;B[df]
;W[bb]
;B[qn]
(;W[np]
;B[mp]
;W[no]
;B[pq]
;W[qq]
;B[oq]
;W[pn])
(;W[on]
;B[qf]
;W[qk]
;B[pm]
;W[qh]
;B[rp]
;W[qq]
;B[om]
;W[nn]
;B[kq]
;W[ln]
;B[ok]
;W[oh]
;B[mm]))))
(;B[cd]
;W[dc]
;B[ed]
;W[ec]
;B[gc]
;W[fq]
;B[qn]
;W[np]))
(;W[fc]
;B[qf]
;W[oq]
;B[np]
;W[pn]
;B[ql]
;W[pl]
;B[nc]
;W[qk]
;B[oe]
;W[jq]
;B[fq]
;W[ko])
(;W[qn]
;B[qc]
;W[qd]
;B[pc]
;W[nc]
;B[oc]
;W[od]
;B[nb]
;W[cq]
;B[dq]
;W[cp]
;B[cn]
;W[co]
;B[do]
;W[bn]
;B[mc]
;W[nd]
;B[rc]
;W[kq]
;B[md]
;W[cm]
;B[dn]
;W[bl])
(;W[fq]
;B[qn]
;W[np]
;B[mp]
;W[no]
;B[pq]
;W[qq]
;B[oq]
;W[qp]
;B[pm]
;W[kp]
;B[mo]
;W[nm]
;B[ln]
;W[lm]
;B[km]
;W[ll]
;B[mn]
;W[om]
;B[pk]
;W[qi]
;B[nk]
;W[nl]))