(;
PW[Albert Yen]
WR[7d]
PB[Pal Balogh]
BR[6d]
EV[WAGC]
RO[7]
DT[2019-06-05]
PC[Matsue, Shimane, Japan]
KM[6.5]
RE[W+Time]
RU[Japanese]
ST[2]
WT[USA]
BT[Hungary]
TM[3600.0]
OT[3x30 byo-yomi]
C[World Amateur Go Championship
White:  Albert Yen, 7D
Black:  Pal Balogh, 6D
June 5, 2019, in Matsue, Shimane Prefecture, Japan
Comments by Albert Yen, 7D
Game editors:  Kiren Polara, Myron Souris

Albert Yen's commentary here is from his 7th round win against Hungary's Pal Balogh.  Albert explains a ton of practical material - from strategic midgame ramifications of the Large Avalanche to tactical tesujis.  For the game moves, Albert also includes LeelaZero's (AI) winrates.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.  To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.];
B[dp]
C[46.8% (0.1%)
50k playouts

Note:  LeelaZero's winrate percentage above is the winning estimation for the player who just moved.  The parenthesized percentage is how much the winning estimation increased (or decreased) as a result of the given move.  The playout count (in this case 50,000) indicates the number of Monte Carlo runs in the game tree search - very roughly speaking, the more playouts the better the estimation.

Be warned that the winrates in this game may not be completely accurate, because WAGC uses Japanese rules, which has a 6.5 point komi rather than LeelaZero's 7.5 point komi.  In a normal game this would barely make a difference, but because the margin of lead in this game is very small throughout one point can make a big impact.  In other words, Black's position is always better than what the winrate indicates.];
W[pd]
C[53.1% (-0.1%)
50k playouts];
B[ed]
C[46.3% (-0.6%)
50k playouts

Balogh is an interesting player.  He spent about 10 minutes pondering the first 2 moves.  Even after the game review I wasn't sure what took him so long to play a star point and a 5-4.];
W[pq]
C[53.5% (-0.1%)
33k playouts

Due to the nigiri I am White again, so I played the same opening as before.];
B[po]
C[45.2% (-1.3%)
5.0k playouts

After a few more minutes of deliberation he broke my plan, inadvertently I think, by playing the high kakari.];
W[qo]
C[55.0% (0.2%)
5.0k playouts];
B[pn]
C[40.2% (-4.8%)
5.0k playouts

Black's opening is very interesting.  Balogh has used about 20 minutes up to this point, which is very unusual for a 1 hour game.  I would not recommend taking this long for the first 4 moves usually.];
W[qn]
C[59.9% (0.1%)
5.0k playouts];
B[pp]
C[41.0% (0.9%)
5.0k playouts];
W[qp]
C[59.0% (-0.0%)
5.1k playouts];
B[oq]
C[41.1% (0.0%)
5.1k playouts]
(;
W[pm]
LB[pr:A]
C[59.0% (0.1%)
5.1k playouts

I chose the avalanche here.  Descending at A is also possible.];
B[qq]
C[42.1% (1.0%)
5.0k playouts];
W[pr]
C[57.9% (-0.0%)
5.0k playouts];
B[rq]
C[42.3% (0.2%)
5.0k playouts]
(;
W[qr]
LB[or:A]
C[53.1% (-4.6%)
5.3k playouts

LeelaZero prefers the joseki where White turns at A instead.  However, I am not familiar with that one so I chose the normal avalanche.];
B[qm]
C[47.1% (0.2%)
5.3k playouts];
W[ql]
C[51.9% (-1.0%)
5.0k playouts]
(;
B[rm]
C[39.9% (-8.3%)
5.6k playouts

This is a new move.  In the classic joseki Black blocks at S2 first.];
W[rp]
C[60.1% (-0.0%)
5.7k playouts];
B[rr]
C[40.5% (0.6%)
5.1k playouts];
W[rs]
C[59.5% (-0.0%)
5.2k playouts]
(;
B[om]
LB[no:A]
C[40.9% (0.4%)
5.7k playouts

I played a game against Wu Hao (2017 US Open Masters Champion) in the 2017 US Open Masters, where he played at A here as Black.];
W[pl]
C[59.0% (-0.0%)
6.2k playouts];
B[ol]
C[40.8% (-0.2%)
7.7k playouts];
W[pj]
C[59.5% (0.3%)
9.6k playouts];
B[ok]
C[40.2% (-0.2%)
9.5k playouts];
W[qi]
C[59.7% (-0.0%)
10k playouts];
B[or]
C[40.4% (0.2%)
10k playouts];
W[sq]
TR[ps]
C[59.9% (0.3%)
7.2k playouts

These exchanges are largely neutral, although I think Black is slightly favored considering that Q1 is a definite sente now. 

However, Black gains very little here compared to White's initial advantage, so the overall position favors White. 

Take a look at the reference diagram to see.]
(;
B[nn]
LB[oj:C][no:A][np:B]
C[31.1% (-9.1%)
5.0k playouts

I was really surprised to see this move because I thought Black would definitely play at A or B.  After the game Balogh also agreed that he made a low-level mistake here (although he doesn't know why he played here).  The proper move is to defend at A or B. 

However, LeelaZero thinks Black should keep pushing at C and ignore the weakness in that region.  The AI is very bold.];
W[np]
LB[mq:A]
C[64.5% (-4.5%)
5.1k playouts

This peep is annoying for Black. 

LeelaZero thinks Black should counterattack with A, but I think this move comes with its own risks.];
B[op]
C[30.8% (-4.7%)
5.4k playouts];
W[hq]
C[69.5% (0.3%)
5.3k playouts

This is the perfect point for splitting this side.]
(;
B[fq]
C[30.9% (0.3%)
5.0k playouts

This is the correct direction.  Approaching from the right would make the right side overconcentrated.

Even though the right side is more empty, it is actually more favorable to chase a weak group into one's moyo than to build territory around the moyo (because the moyo will become overconcentrated).]
(;
W[kp]
LB[jp:A][kq:B]
C[67.7% (-1.4%)
5.0k playouts

This is a mistake.  Playing at A is the right point.  This move is too close to Black's moyo.

Note that it is actually bad to make a two space extension at B here even though there is plenty of space.]
(;
B[ip]
LB[ho:A]
C[29.1% (-3.2%)
5.3k playouts

It is a good idea to seal White here, but this move is probably better at A.  In the game White is able to secure two eyes locally, so Black cannot be satisfied.];
W[iq]
C[71.1% (0.1%)
5.6k playouts];
B[hp]
C[28.7% (-0.3%)
5.6k playouts];
W[jp]
C[71.7% (0.3%)
5.3k playouts];
B[gq]
C[28.4% (0.0%)
5.1k playouts]
(;
W[lr]
LB[jn:A][lq:B][mq:C]
TR[ps]
C[71.9% (0.3%)
5.1k playouts

Apparently Balogh missed this move.  He thought that White cannot make a living shape here and therefore a cap around A would be sente.  However, White is alive with this move. 

Note that B and C both leave bad aji on the side.  (White's group is weaker here because the Q1 atari is sente for Black)

White's opening so far is very successful.  Black's winrate is already below 30% and we're not even 50 moves into the game.];
B[qc]
LB[cd:B][cj:A]
C[26.7% (-1.4%)
5.4k playouts

A and B are far more urgent than this 3-3.];
W[qd]
C[73.8% (0.5%)
5.5k playouts];
B[pc]
C[26.2% (-0.0%)
6.2k playouts];
W[nc]
C[74.0% (0.2%)
5.6k playouts];
B[oc]
C[26.1% (0.1%)
5.6k playouts];
W[od]
C[74.0% (0.0%)
5.7k playouts];
B[nb]
C[26.1% (0.0%)
5.8k playouts];
W[cd]
C[74.4% (0.5%)
5.0k playouts

White is happy to get sente in the upper right and invade this corner. 

If we think of the top two corners as miai, then it's not hard to tell that it's more urgent to play in the upper left.  Black's 5-4 stone does not control the corner as well as White's star point does, so there is more value in Black's corner.];
B[df]
C[24.2% (-1.4%)
6.2k playouts];
W[ec]
C[76.8% (1.0%)
5.1k playouts];
B[dd]
C[22.5% (-0.7%)
5.1k playouts];
W[dc]
C[77.5% (0.0%)
5.2k playouts];
B[ce]
C[19.7% (-2.8%)
5.0k playouts]
(;
W[cc]
LB[bc:A][bd:B]
C[75.1% (-5.2%)
5.5k playouts

In hindsight, I should have played at A and taken sente. 

Without AI I would never even consider A, so credit to Leela for coming up with it.

Leela also recommends the descent at B, but that variation is more complicated.];
B[fd]
C[25.0% (0.1%)
5.1k playouts];
W[gb]
LB[gc:A]
C[73.5% (-1.6%)
5.0k playouts

I distantly remembered seeing an AI play a knight's move in a shape like this over the normal jump at A, but in this case Leela recommends A.  Oh well...];
B[dk]
C[24.9% (-1.6%)
5.0k playouts];
W[cp]
LB[cm:A]
C[72.7% (-2.4%)
5.0k playouts

I can also consider invading at A (Leela's top choice).];
B[co]
C[27.3% (0.0%)
5.0k playouts];
W[bo]
C[72.9% (0.3%)
5.0k playouts]
(;
B[cq]
LB[bm:B][do:A]
C[26.3% (-0.7%)
5.0k playouts

Balogh said he considered connecting at A instead, but was worried about my jump at B.  I actually never thought about the jump at B, but it's a very good move.];
W[bp]
C[73.1% (-0.6%)
5.0k playouts];
B[cn]
C[27.1% (0.2%)
5.0k playouts]
(;
W[bn]
LB[dq:A]
C[73.4% (0.5%)
5.0k playouts

The AI suggests playing at A here.];
B[cm]
C[27.0% (0.4%)
5.0k playouts];
W[bm]
C[73.5% (0.5%)
5.0k playouts];
B[cl]
C[27.6% (1.0%)
5.0k playouts];
W[bl]
C[70.8% (-1.6%)
5.1k playouts];
B[bk]
C[29.2% (0.0%)
5.1k playouts];
W[cj]
C[67.9% (-2.9%)
5.1k playouts];
B[ck]
C[28.4% (-3.7%)
5.0k playouts]
(;
W[cr]
LB[bq:A]
C[74.8% (3.2%)
5.0k playouts

This innocent looking move was actually the biggest mistake that I made during WAGC.  I thought this would get me more points but I could have lost the game from this move.  Playing the normal move at A is the only move here. 

We'll see why in a few moves.];
B[bq]
C[26.0% (0.8%)
5.0k playouts];
W[br]
C[76.3% (2.2%)
5.0k playouts];
B[dq]
LB[aq:A]
TR[dq]
C[24.6% (0.8%)
5.0k playouts

The descent at A doesn't work for Black because White can cut at D3.];
W[aq]
LB[fr:A]
C[75.5% (0.1%)
5.0k playouts 

White is alive in the corner.  However, A becomes sente for Black, which means that the bottom White group is no longer alive locally.  Suddenly the game is not so bad for Black anymore (Please ignore the winrate here because the AI hasn't read this part yet).];
B[jn]
C[24.9% (0.4%)
5.0k playouts];
W[kn]
C[75.0% (-0.0%)
5.0k playouts];
B[km]
C[24.8% (-0.1%)
5.0k playouts];
W[ln]
C[76.0% (0.8%)
5.0k playouts];
B[lm]
C[25.6% (1.6%)
5.0k playouts];
W[jo]
C[70.1% (-4.3%)
5.0k playouts];
B[in]
C[29.9% (0.1%)
5.0k playouts];
W[ji]
LB[ih:B][jh:C][jl:D][mn:E][jr:A]
C[67.8% (-2.3%)
5.0k playouts

I thought the bottom group was safe at this point but actually Black can play a ko with A.  Leela still gives White a good winrate here because the AI also thinks the bottom group is safe (there are aspects of Go where humans excel, and local life and death is one of them).

In the center I should play at B or C because the game move is too close to Black's wall.  I was aiming for the peep at D but since White's bottom group is weak E is actually sente, which neutralizes White's peep. 

The life and death situation of the bottom group will dictate the outcome of the game.];
B[oj]
C[30.9% (-1.4%)
5.0k playouts]
(;
W[oi]
LB[jg:A]
C[57.3% (-11.8%)
5.0k playouts

This is a slack move.  I should have defended in the center at A.];
B[ni]
C[42.7% (0.0%)
5.0k playouts];
W[oh]
C[56.9% (-0.3%)
5.0k playouts];
B[jr]
LB[cr:A][ps:B]
C[40.7% (-2.4%)
5.0k playouts

My heart dropped when I saw this move.  I realized that Black can make a ko here because of my mistake at A and the sente at B.];
W[jq]
C[59.4% (0.1%)
5.1k playouts];
B[gc]
LB[jg:A]
C[37.8% (-2.9%)
5.0k playouts

This is a timesuji.  As mentioned before, Balogh spent a lot of time on the first joseki, so by now he is already in byo-yomi.  He didn't have time to read out the life and death situation in the bottom so he essentially let me off the hook.

We'll see why there's a ko in the bottom later.];
W[hb]
LB[jg:A][jh:B]
C[53.0% (-9.3%)
5.0k playouts

It is probably more urgent for me to jump at A here.  In the game I didn't think that Black could attack White's center stone very severely, but actually Black has a good move at B.]
(;
B[hi]
LB[jg:A][jh:B]
C[32.0% (-15.0%)
5.0k playouts

This is arguably Black's losing move (if we ignore the aji in the bottom for a minute).  Black has to attack at B here.  Notice playing at A doesn't work well for Black.

Black cannot play so passively, as White is ahead in territory.  Take a look at the positional judgement diagram after the next move to see.];
W[jg]
C[67.6% (-0.4%)
5.0k playouts

White has a territorial lead (assuming the bottom group is safe, which it's not)]
(;
B[nh]
C[32.6% (0.2%)
5.0k playouts];
W[mb]
C[59.8% (-7.6%)
5.0k playouts

Locally White loses some points here but I thought that White already had enough territory so I wanted to simplify the game.];
B[mc]
C[34.7% (-5.5%)
5.0k playouts];
W[nd]
C[65.3% (0.0%)
5.1k playouts];
B[lb]
LB[md:A]
C[34.6% (-0.0%)
5.1k playouts

After these exchanges A is definitely sente, so the center group stones are very safe.];
W[io]
C[63.0% (-2.4%)
5.0k playouts];
B[ho]
C[35.3% (-1.7%)
5.0k playouts];
W[jl]
LB[jm:D][mn:A][lo:C][mo:B]
C[49.1% (-15.6%)
5.0k playouts

This is a very big mistake.  Looking back I don't know why I played here.  I knew there was a ko in the bottom, so A through C were sente for Black.  The cut at D is not severe at all.  I essentially wasted a move here.];
B[jm]
C[31.3% (-19.6%)
5.0k playouts

I guess Balogh didn't have time to consider his forcing moves so he just chose the simple connection.  However, he missed a very good chance to turn the game around here.

Now that White has taken the peep in sente the territory gap has widened.];
W[hg]
C[64.6% (-4.1%)
5.0k playouts];
B[og]
C[36.3% (0.8%)
5.0k playouts];
W[qg]
C[65.3% (1.5%)
5.0k playouts];
B[ph]
C[34.3% (-0.5%)
5.0k playouts

Timesuji.];
W[pi]
C[65.7% (0.0%)
5.1k playouts];
B[rd]
LB[rc:A]
C[33.5% (-0.7%)
5.0k playouts

This timesuji actually loses points, so I think this is a mistake.  Normally descending at A is a huge move.];
W[re]
C[66.7% (0.2%)
5.0k playouts];
B[kr]
LB[rc:A]
C[41.1% (7.8%)
5.0k playouts

I thought Black was about to start the ko now.  That is why I didn't play the sente hane at A earlier because White might have ko threats there (Although Black definitely wouldn't respond to ko threats in the upper right).];
W[mq]
C[57.0% (-1.9%)
5.0k playouts]
(;
B[bd]
LB[mo:A][hr:B]
C[23.3% (-19.7%)
5.0k playouts

This is another timesuji, Balogh didn't see the ko in the bottom.  He missed a very good chance to win the game out right here. 

Balogh thought that Black can only connect at B in the bottom, but after the game I pointed out that Black can make an exchange at A before saving the two stones at B.  If Black plays that way the game would pretty much be over.];
W[dr]
C[51.4% (-25.3%)
5.0k playouts

I fixed the ko with this move and the game tilted toward White again (although the winrate graph doesn't present it as such). 

Balogh played the last move at the last second, so I knew the hane was just a timesuji.  I decided to take advantage of that and tenuki.];
B[bc]
C[48.1% (-0.5%)
5.0k playouts];
W[bb]
LB[fr:A]
C[52.0% (0.1%)
5.0k playouts

The game is still close because Black gained a lot in the upper left, but White maintains a small lead now that the bottom group is safe (A is no longer sente for Black so the aforementioned moves don't work anymore).]
(;
B[cb]
LB[ab:A]
C[43.0% (-4.9%)
5.0k playouts

Balogh wants to complicate the game with this ko, but it's still better for Black to play the long game since the game is close.  The normal hane at A is still correct here.];
W[db]
C[57.2% (0.3%)
5.0k playouts];
B[ba]
C[36.2% (-6.6%)
5.0k playouts];
W[ca]
C[64.1% (0.2%)
5.0k playouts];
B[ab]
C[31.1% (-4.8%)
5.0k playouts];
W[aa]
C[59.7% (-9.1%)
5.0k playouts];
B[ar]
C[35.1% (-5.1%)
5.0k playouts];
W[as]
C[64.9% (0.1%)
5.0k playouts];
B[ba]
C[28.8% (-6.3%)
5.0k playouts];
W[rc]
C[70.0% (-1.2%)
5.0k playouts

I figured that if White can get this big endgame I would be slightly ahead.]
(;
B[ma]
LB[rb:A]
C[25.6% (-4.4%)
5.0k playouts

This move loses a lot of points.  Black should atari at A first.]
(;
W[hc]
LB[id:A]
C[66.4% (-8.1%)
5.0k playouts

I planned to give up the ko and reinforce the center group.  However, playing at A would have been better.];
B[cb]
C[26.5% (-7.1%)
5.0k playouts];
W[fc]
LB[ie:A]
C[59.2% (-14.3%)
5.0k playouts

I should have played at A directly.  This atari is a bad exchange because it weakens the connection in the center.];
B[gd]
C[41.2% (0.4%)
5.0k playouts];
W[ie]
LB[hc:A]
C[58.5% (-0.3%)
5.0k playouts

I spent an extra move protecting the center because of my slack move at A.];
B[da]
C[42.2% (0.7%)
5.0k playouts];
W[fb]
C[58.3% (0.6%)
5.0k playouts

Nevertheless, White maintains a small lead here.]
(;
B[jj]
LB[if:A]
C[34.7% (-7.0%)
5.0k playouts

This move is a bit passive.  Leela suggests attacking the center with A.];
W[gh]
C[66.4% (1.1%)
5.0k playouts];
B[gi]
C[34.1% (0.5%)
5.0k playouts];
W[kj]
LB[gh:A][fi:C][gi:B]
C[65.9% (0.1%)
5.0k playouts

Making the A/B exchange before this hane is the proper sequence.  If I hane here first then Black wouldn't block at B (instead, jump at C).];
B[ij]
C[31.4% (-2.7%)
5.0k playouts];
W[eh]
LB[ig:B][fh:A]
C[53.4% (-15.2%)
5.0k playouts

This is a mistake.  I should have extended because of the weakness at B.

Of course, I was also in byo-yomi and I did not see B.]
(;
B[fi]
LB[ig:A]
C[36.7% (-9.9%)
5.0k playouts

Black missed a good chance to counterattack at A.];
W[fh]
C[63.2% (-0.1%)
5.0k playouts];
B[ki]
C[21.4% (-15.4%)
5.0k playouts];
W[bj]
LB[rb:A][bf:C][cg:B]
C[66.4% (-12.1%)
5.0k playouts

This is a very slack move.  I should have played at A immediately.

Locally, it is also better for White to play at B because the peep at C becomes sente.];
B[ch]
LB[rb:A]
C[24.4% (-9.1%)
5.0k playouts

Black should have played the atari at A because it is much bigger.

However, even if Black responds here this exchange is bad for White.];
W[rb]
C[76.7% (1.1%)
5.0k playouts

Though both sides made some mistakes in the center, White gets this last endgame and is ahead by a few points.];
B[jb]
C[17.8% (-5.4%)
5.0k playouts];
W[kc]
LB[hd:A]
C[77.7% (-4.5%)
5.0k playouts

I wanted to simplify the game by connecting all the groups in the center.  I thought that simply playing at A is too passive, but I guess it works just as well (LeelaZero recommends A).];
B[jc]
C[20.7% (-1.7%)
5.0k playouts];
W[kd]
C[74.9% (-4.4%)
5.0k playouts];
B[kb]
C[19.1% (-6.0%)
5.0k playouts];
W[md]
LB[ea:B][hd:A]
C[73.3% (-7.6%)
5.0k playouts

This is definitely a mistake, though.  I should have connected at A to remove the bad aji.  Right now Black can cut or play at B in sente.  In short, this move is not as valuable as A.];
B[jd]
C[21.6% (-5.1%)
5.0k playouts];
W[ke]
C[66.3% (-12.1%)
5.0k playouts];
B[je]
C[25.1% (-8.6%)
5.0k playouts];
W[jf]
LB[mg:A]
C[74.9% (0.0%)
5.0k playouts

Though Black made more mistakes in the center, the game is still very close (White is only ahead by 0.5-1.5 points).]
(;
B[kh]
TR[og][ph]
C[23.4% (-1.7%)
5.0k playouts

This is the final losing move.  Black should have made some exchanges in the bottom and save the two marked stones.

This extension is very small.];
W[lc]
C[73.2% (-3.4%)
5.0k playouts];
B[mb]
C[16.5% (-10.3%)
5.0k playouts];
W[hd]
C[84.4% (0.9%)
5.0k playouts];
B[qa]
C[12.8% (-2.7%)
5.0k playouts];
W[qb]
C[86.8% (-0.4%)
5.0k playouts];
B[pb]
C[13.5% (0.3%)
5.0k playouts];
W[ra]
C[86.9% (0.4%)
5.0k playouts];
B[pa]
C[12.1% (-1.0%)
5.1k playouts];
W[ng]
C[88.3% (0.4%)
5.0k playouts];
B[lp]
C[4.7% (-7.0%)
5.0k playouts];
W[lo]
C[96.0% (0.8%)
5.0k playouts];
B[ps]
C[3.3% (-0.7%)
5.0k playouts];
W[sr]
LB[bd:A]
C[97.0% (0.3%)
57k playouts

Black loses on time.

I think Balogh mostly lost due to poor time allocation.  He had many chances to win, even well into endgame, but he didn't have the time to think through the important variations because he spent too much of it on the first 30 moves.

I could clearly feel that he fell apart after the hane at A because of time pressure.  He gradually fell back and had a suffocating loss.  He didn't challenge my lead enough.  We both made many mistakes and both sides had many opportunities to control the game.  I really enjoyed playing this game and I think I got a lot out of it.]
)
    (;
    B[mo];W[lo];B[mr];W[ls];B[mp];W[lp];B[nq];W[lq];B[gr];W[hs];B[hr];W[ir];B[mg]
    LB[md:A][bj:B]
    C[The game is very close because of White's mistakes at A and B (half point game).]
    )
)
    (;
    B[ig];W[ih];B[if];W[jf];B[hf];W[hh];B[je];W[ke];B[jd];W[ld];B[fh]
    LB[ea:D][gf:C][eh:A][fh:B]
    C[Black can play the wedge at B here, which makes C sente.  If C is sente then the top White group is in quite a bit of danger (Black can play at D to kill White if C is sente).

Therefore, I should have extended at B instead of jumping at A. 

Of course, this is all AI talk.  There is no way that we could have read this out in 30 seconds.]
    )
)
    (;
    B[if];W[jf];B[hf];W[ig];B[je]
    C[Black can cut off this group here.]
    )
)
    (;
    W[id];B[cb];W[fc];B[hd];W[ie];B[da];W[fb]
    C[White has a stronger position in the center in this variation.]
    )
)
    (;
    B[rb]
    LB[ob:A]
    C[Normally White can start a ko with the cut at A, but in this position White has no ko threats so Black can make this exchange first before capturing.];
    W[sd];B[ma]
    C[This is much better for Black than the game.]
    )
)
    (;
    B[ab];W[ba];B[rc]
    C[Compared to our last positional judgement diagram, Black profits a lot in both corners.  The game should be close here.  I will continue with Leela's diagram and count points again.];
    W[fg];B[mo];W[lp];B[fi];W[ii];B[hh];W[ig];B[ik]
    LB[ie:A][kf:B]
    C[I am assuming that both sides play peacefully and lead the game to yose. 

Conclusion: Even if Black plays peacefully here the game will be decided by just 1 or 2 points.  (Black has more aggressive options at A or B, so there's no reason for Black to start an unfavorable ko in the upper left.)];
    W[ng];B[lh];W[mg];B[lg];W[id];B[gg];W[gf];B[gh];W[fe];B[eg];W[ak];B[aj];W[al];B[bj];W[jk];B[il];W[lf];B[lo];W[mp];B[kj];W[jj];B[ki];W[jb]
    LB[hf:B][mf:A]
    TR[ca][da][ea][fa][ga][ha][ia][db][eb][ib][ne][nf][oe][of][pe][pf][qe][qf][og][pg][rg][rh][ri][rj][rk][rl][rm][rn][ro][sg][sh][si][sj][sk][sl][sm][sn][so][ph][qh][qj][am][an][ao][ap][qm][sp][kq][kr][ks][lq][qq][rq][ar][as][jr][js][rr][bs][cs][ds][ss]
    SQ[na][oa][pa][qa][ra][sa][mb][ob][pb][qb][rb][sb][sc][ae][af][ag][ah][ai][bf][bg][bh][bi][cf][cg][ch][ci][dg][dh][di][dj][eh][ei][ej][ek][el][em][en][eo][ep][gi][gj][gk][gl][gm][gn][go][gp][li][lj][cj][fj][fk][fl][fm][fn][fo][fp][mj][mk][ml][mm][nj][nk][nl][nm][hk][hl][hm][hn][dl][dm][dn][do][im][ln]
    C[Let's count again.

White: 44 on the right side, 10 on the top, 9 in bottom left, 8 on the bottom (Total: 71)

Black: 14 in top right, 12 in the center, 52 on the left side (Total: 78) 

With a 6.5 komi the game is actually very close.  White has more potential at A and B but Black has sente here.

Black has a good chance to win the game from here.]
    )
)
    (;
    B[hr];W[ir];B[is];W[kq];B[js];W[mo]
    C[White is alive here.]
    )
    (;
    B[mo]
    LB[lo:B][fr:C][hr:A]
    C[White cannot live unconditionally here.  Due to Black's sente at C, White's only options are A and B, but both lead to ko. 

In conclusion, if Black plays here the game is over.  Black has numerous ko threats in the right and left side.]
    (;
    W[lo];B[mp];W[lp];B[hr];W[ir];B[is];W[nr];B[ps];W[sr];B[ns];W[ms];B[nq]
    C[This is a ko.];
    W[gr]
    C[This move doesn't work.];
    B[fr];W[hs];B[ar];W[as];B[cs]
    LB[dr:B][fr:A]
    TR[jr][kr]
    C[White's corner is in trouble.  Although there's actually some aji left here, Black can exchange A with White's B anytime, so White cannot capture the marked stones.]
    )
        (;
        W[hr];B[lp]
        C[This hits White in the vital point.];
        W[nr];B[ns];W[ms];B[lq];W[kq];B[os];W[ks];B[js]
        C[This is still a ko and Black even gets to take the ko first.]
        )
    )
)
    (;
    B[hg]
    C[We'll quickly count up each player's points here assuming that Black plays passively to protect his territory.];
    W[ij];B[hj];W[ik];B[hl];W[il];B[hm];W[mb];B[mc];W[nd];B[lb];W[rc];B[ma];W[qb];B[pb];W[pa];B[ob];W[mg];B[kr];W[mq];B[hr]
    C[This move destroys the aji in the bottom, but for now we are assuming that there is nothing there (we're doing this from the perspective of Balogh, who thinks White is alive unconditionally here).];
    W[ir];B[is];W[js];B[ks];W[mo]
    LB[gr:A]
    C[White can't afford to start the ko at A.];
    B[fr];W[dr];B[be];W[bd];B[le];W[lh];B[rb];W[sb];B[qa];W[rd];B[ps];W[sr]
    LB[he:A][mk:B]
    TR[la][na][oa][pa][mb][qb][de][ee][fe][cf][cg][ch][ci][cj][ef][eg][eh][ei][ej][ek][el][em][en][eo][ep][ff][fg][fh][fi][fj][fk][fl][fm][fn][fo][fp][gf][gg][gh][gi][gj][ag][ah][ai][aj][bg][bh][bi][bj][dg][dh][di][dj][dl][dm][dn][do][gl][gm][gn][go][gp][nm][hn][on][gr][gs]
    SQ[aa][ba][ca][da][ea][fa][ga][ha][ab][bb][cb][db][eb][ac][bc][sd][se][sf][sg][sh][si][sj][sk][sl][sm][sn][so][sp][oe][of][og][pe][pf][pg][qe][qf][qg][re][rf][rg][ph][qh][rh][pi][ri][rj][rk][rl][rm][rn][ro][qj][am][an][ao][ap][qm][ko][lo][lp][lq][mp][qq][rq][ar][as][rr][bs][cs][ss]
    C[Let's count here.

White: 44 on right side, 5 in the bottom, 8 in bottom left, 15 in top left (72 total)

Black: 6 in top right, 4 in the bottom, 58 in the left side (68 total)

As we can see, Black is behind on the board.  Although Black might have more potential around A and B, there's no room to make up the 10 point territory deficit.]
    )
)
    (;
    B[jg]
    LB[jh:A]
    C[This is inferior to the attachment at A.];
    W[kh];B[kg];W[mh]
    C[White can easily escape.]
    )
    (;
    B[jh]
    LB[ih:B][kh:A]
    C[This creates a very complicated position.  If White hanes at A Black will cut.  If White hanes at B Black can enclose White inside the moyo, and it's uncertain if White can make 2 eyes.]
    )
)
    (;
    W[jg];B[pi];W[qj];B[ph];W[qh]
    C[White can manage to connect on the right side.]
    )
)
    (;
    W[bq];B[cr];W[br]
    C[White can be satisfied with this invasion.  The game is still slightly better for White.]
    )
)
    (;
    W[dq];B[dr];W[do];B[ep];W[bq];B[cr];W[cm];B[bn];W[bm];B[dn];W[cj];B[dm];W[dj]
    C[White has a flexible shape on the left side.]
    )
)
    (;
    B[do];W[bm]
    LB[cj:A][cq:B]
    C[Balogh is correct here.  Black will struggle to profit here as A and B are miai for White next.]
    )
)
    (;
    W[bc];B[bd];W[cc];B[fd]
    LB[fb:E][cc:B][fc:D][bd:A][be:F][bo:C]
    C[After the exchange of A and B White's corner is strengthened, so White can tenuki and split Black's side at C. 

Notice that blocking at D is gote because White has the hane at E and capturing at F as miai.]
    )
    (;
    W[bd]
    C[This is actually Leela's first choice move.];
    B[fc];W[be];B[bf];W[fd];B[fb];W[ef];B[dg];W[fe];B[de];W[cb];B[hc];W[md];B[mb]
    LB[ni:A][bo:B]
    C[This is another game.  White will play at A or B next.]
    )
)
    (;
    W[lq]
    LB[kr:A]
    C[This is the wrong shape because A is painful for White.];
    B[kr]
    (;
    W[lr];B[ir]
    LB[jq:A][hr:B]
    C[A and B are miai for Black next.  White loses a lot of points here.]
    )
        (;
        W[jr]
        C[Blocking here is no better.];
        B[lr];W[mr];B[ms]
        C[Black can connect here (O2 also works).]
        )
    )
    (;
    W[mq]
    LB[kr:A]
    C[This is also the wrong shape.  A is still very severe.];
    B[kr]
    LB[ir:B][mr:A]
    C[A and B are miai for Black now.  Take a look at the other variation to see why B works.]
    )
    (;
    W[mr]
    LB[lq:A]
    C[This is also a little awkward because of the weakness at A.];
    B[lq]
    LB[mr:A]
    C[White cannot capture this stone, so White's move at A is largely useless.]
    )
)
    (;
    B[ho];W[gp];B[fn];W[fp];B[eq]
    C[White has to struggle more than the game.]
    )
)
    (;
    W[kq];B[jp];W[jq];B[hp];W[ip];B[io];W[iq];B[ho]
    C[Black has a nice way to seal White.]
    )
)
    (;
    B[jq];W[jp];B[kp];W[ip];B[kq];W[dr]
    C[White can easily make a live shape here and Black is overconcentrated.]
    )
)
    (;
    AE[ql][qm][rm][rp][rq][rr][rs][qq][qr][sq]
    TR[pn][po][pp]
    C[Most people would prefer White here because the marked Black stones have potential liberty shortages.]
    )
    (;
    AE[ql][qm][rm][rp][rq][rr][rs][qq][qr][sq]
    LB[qi:9][pj:7][ok:8][ol:6][pl:5][om:4][pm:3][or:2][pr:1]
    TR[ps]
    C[From this shape, the exchanges from 1 to 5 clearly favor White.

While Black gains a little from 6 to 9, it is rather inconsequential.

The following exchanges inside White's territory are largely neutral, where Black trades around 2 points of territory for extra thickness on the outside (Most notably, the sente at Q1)]
    )
    (;
    B[oj];W[oi];B[ni];W[oh];B[nh];W[ng];B[og];W[pg];B[of];W[pf];B[mg];W[iq];B[jp];W[jq];B[kp];W[kq];B[lp];W[fq]
    C[This is Leela's sample diagram.  Black plays more tightly than the game but loses more territory.  I suppose a moyo-oriented player might like this, but I would not play like this personally as Black.]
    )
)
    (;
    B[no]
    LB[om:A]
    C[I asked Balogh about this move, but he was afraid that White would extend at A. 

I didn't really consider this possibility in the game, but Leela does think playing at A is good.  Balogh has a good sense of shape here.]
    (;
    W[pl];B[qj]
    C[Wu Hao played like this in the game.]
    (;
    W[qh];B[oj];W[nl];B[rl]
    TR[rl]
    C[The game continued like this, but in hindsight I should have blocked at S8 and captured the 2 stones.

This fight slightly favors Black.]
    )
        (;
        W[rl];B[or];W[sq]
        C[This is roughly an even result.]
        )
    )
        (;
        W[om];B[or];W[sq]
        TR[qm][rm]
        C[It is hard for Black to move out the two stones on the right side now, and this favors White.]
        )
    )
)
    (;
    B[rr];W[or];B[rm];W[rn];B[rl];W[rp];B[qk];W[om]
    (;
    B[no]
    LB[nq:A]
    C[Playing at A is also possible here.];
    W[nq];B[nn];W[ok];B[qh];W[ml];B[kn]
    C[This is the classic big avalanche joseki.  The AI prefers White over Black in this joseki.]
    )
        (;
        B[nq];W[op];B[oo];W[np];B[no];W[mp];B[mo];W[lo];B[lp];W[mq];B[ln];W[ko];B[mm];W[jn]
        C[According to LeelaZero, this is an even position.]
        )
    )
)
    (;
    W[or];B[qm];W[rm];B[ql];W[rl];B[nq];W[nr];B[qk];W[rp];B[mq];W[om];B[no];W[mr]
    C[This is the AI's top choice variation for White.]
    )
)
    (;
    W[pr];B[pm];W[qm];B[pl]
    C[Most AI will actually tell you to tenuki here as Black, but of course no human wants to do that.];
    W[nq]
    C[This is another possibility for White.]
    )
)

