(;
ST[2]
RU[Japanese]
KM[6.50]
TM[3600]
OT[3x30 byo-yomi]
PW[Albert Yen]
PB[Timur Sankin]
WR[7d]
BR[6d]
DT[2019-06-03]
EV[WAGC]
RO[5]
WT[USA]
BT[Russia]
RE[W+4.50]
C[World Amateur Go Championship
White:  Albert Yen, 7D
Black:  Timur Sankin, 6D
June 4, 2019, in Matsue, Shimane Prefecture, Japan
Commentary:  Albert Yen, 7D
Game editors:  Kiren Polara, Myron Souris

Albert Yen placed an outstanding 4th in this year's World Amateur.  Albert graciously gives us an enlightening commentary of his 5th round win against Russia's Timur Sankin.  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[pd]
C[46.6% (0.0%)
5.2k 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 5200) indicates the number of Monte Carlo runs in the game tree search - very roughly speaking, the more playouts the better the estimation.

In the nigiri I got White again.  I was quite happy with this, because I wanted to keep playing my one-space high pincer.  For some reason I drew White in 7 out of my 8 games in the WAGC (Roughly 3% chance mathematically speaking).

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[dp]
C[53.5% (0.1%)
3.4k playouts];
B[pq]
C[46.5% (0.0%)
721 playouts];
W[dc]
C[53.4% (-0.1%)
360 playouts];
B[ce]
C[46.7% (0.1%)
1.5k playouts];
W[dg]
C[51.9% (-1.4%)
171 playouts

My favorite pincer.];
B[ee]
C[48.0% (-0.1%)
335 playouts];
W[fd]
C[52.6% (0.6%)
1.1k playouts];
B[di]
C[47.1% (-0.3%)
130 playouts];
W[bg]
C[50.7% (-2.2%)
163 playouts];
B[fe]
C[49.8% (0.5%)
283 playouts];
W[gd]
C[50.3% (0.1%)
339 playouts];
B[ge]
C[50.5% (0.7%)
380 playouts];
W[hd]
C[49.6% (0.1%)
510 playouts];
B[he]
C[50.4% (0.1%)
693 playouts];
W[id]
C[50.1% (0.5%)
1.4k playouts

I like to play this joseki as White, because I get a good amount of solid territory.]
(;
B[ch]
LB[ck:A]
C[47.8% (-2.1%)
103 playouts

AI seems to prefer a fighting variation at A.];
W[cg]
C[52.2% (0.0%)
230 playouts];
B[eh]
C[46.3% (-1.5%)
1.2k playouts];
W[cd]
TR[cj]
C[52.9% (-0.8%)
183 playouts

It would be better to for me to play C10 before this move.];
B[dd]
C[48.2% (1.1%)
227 playouts];
W[cc]
C[52.7% (0.9%)
366 playouts]
(;
B[be]
LB[bd:A]
C[46.9% (-0.4%)
965 playouts

Black can consider playing the hane at A.  If White blocks then Black gets sente.];
W[cj]
C[53.1% (0.0%)
579 playouts

Because Black answered with a simple descent, I am able to come back here without a problem.]
(;
B[ci]
C[47.1% (0.2%)
459 playouts];
W[bj]
C[54.9% (2.0%)
561 playouts];
B[dk]
C[41.2% (-3.9%)
204 playouts];
W[cm]
C[60.2% (1.3%)
368 playouts];
B[bi]
C[39.7% (-0.2%)
933 playouts];
W[qo]
LB[ed:A][de:B]
C[60.1% (-0.2%)
1.2k playouts

I omitted the atari exchange at A, thinking that I can exploit a liberty shortage with the throw-in at B later, but it's really unlikely.  I should just exchange A with B to get sente 2 points (Black later got that in the game).];
B[np]
C[40.1% (0.2%)
1.3k playouts];
W[qk]
C[59.2% (-0.7%)
794 playouts];
B[cq]
LB[nc:A]
C[38.8% (-2.0%)
499 playouts

The shimari at A seems to be more urgent.];
W[dq]
C[61.9% (0.6%)
548 playouts

I thought about this shape for 5 minutes and debated where to respond.  I actually played a similar game as White against Tim Song in the US Open Masters last year, where I immediately reinforced at D3 (denying Black the chance to invade at 3-3), but after the game I thought the move was too slow so I changed my play in the game. 

Actually, I played the optimal variation after my deliberation.  My sequence was Leela's first choice, which I am very proud of.];
B[cp]
C[37.9% (-0.2%)
677 playouts];
W[co]
C[62.6% (0.5%)
794 playouts];
B[bo]
C[37.9% (0.5%)
3.6k playouts];
W[bn]
C[62.1% (0.0%)
3.9k playouts];
B[do]
C[37.4% (-0.5%)
1.2k playouts];
W[cn]
C[62.8% (0.2%)
1.3k playouts];
B[dr]
C[37.1% (-0.1%)
1.4k playouts];
W[er]
C[62.2% (-0.7%)
3.1k playouts];
B[br]
C[36.3% (-1.5%)
448 playouts];
W[fq]
C[64.8% (1.2%)
400 playouts];
B[bp]
C[36.0% (0.8%)
2.8k playouts];
W[eo]
C[64.4% (0.4%)
2.4k playouts];
B[kq]
LB[nc:A]
C[29.6% (-6.0%)
2.5k playouts

Another slow move.  The shimari at A is more urgent.

As we can see, though Black has not played obvious bad moves, White is already quite ahead in winrate.  We can explain this by saying that White has had a successful opening and has a fuseki lead (small but secure lead, generally less than 5 points).]
(;
W[qc]
LB[nc:A]
C[69.0% (-1.4%)
390 playouts

I played this knowing that AI like to play the 3-3 invasion, but in this situation Leela actually recommends a normal kakari.  Oh well. :c]
(;
B[qd]
LB[pc:A]
C[29.2% (-1.8%)
1.1k playouts

It's better to block from the other side.];
W[pc]
C[71.0% (0.2%)
1.4k playouts];
B[oc]
C[28.9% (-0.1%)
3.3k playouts];
W[ob]
C[71.1% (0.0%)
3.5k playouts];
B[nb]
C[28.9% (0.0%)
3.7k playouts];
W[nc]
C[71.1% (-0.0%)
3.7k playouts];
B[od]
C[29.3% (0.4%)
1.1k playouts];
W[mb]
C[71.1% (0.4%)
3.8k playouts];
B[pb]
C[28.9% (0.0%)
3.9k playouts];
W[na]
C[70.9% (-0.2%)
1.8k playouts];
B[qb]
C[28.9% (-0.2%)
4.0k playouts];
W[qq]
C[70.9% (-0.3%)
3.3k playouts];
B[qr]
C[29.1% (-0.0%)
3.5k playouts]
(;
W[rr]
LB[pr:A]
C[63.3% (-7.6%)
2.6k playouts

This is my first major mistake of the game.  To be honest, this was my first time playing this shape in a tournament game.  I didn't know how to settle this corner and I intuitively played the double hane, because I thought that it was similar to the cut at A.  Nevertheless, A would be better.];
B[qp]
C[36.8% (0.1%)
3.5k playouts];
W[rq]
C[63.1% (-0.1%)
3.2k playouts];
B[pp]
C[37.0% (0.1%)
3.4k playouts];
W[rp]
C[61.9% (-1.2%)
2.2k playouts]
(;
B[pr]
LB[em:A][rr:B]
C[26.7% (-11.5%)
536 playouts

Black's mistake is connecting here.  This is a terrible exchange for Black and it has nullified the impact of White's mistake at B.

Black should tenuki and play at A.];
W[pm]
C[72.8% (-0.5%)
805 playouts];
B[qi]
C[24.7% (-2.6%)
12k playouts]
(;
W[iq]
LB[nd:A]
C[73.6% (-1.8%)
4.2k playouts

Slow move.  During the game I thought I had made some large mistakes in bottom right.  I was a little pessimistic about the board state and I tried to make more territory with the J3 extension instead of playing the usual move at A.  However, playing at A gives me more points in the long run, because it's the vital point on the board.];
B[me]
C[25.9% (-0.5%)
3.4k playouts]
(;
W[jf]
LB[ld:A]
C[70.8% (-3.3%)
1.1k playouts

Again, I thought the game wasn't great for me so I played a seemingly dangerous move. 

Obviously, A is better.];
B[bl]
C[26.5% (-2.7%)
236 playouts];
W[cl]
C[73.9% (0.4%)
365 playouts];
B[ck]
C[26.9% (0.7%)
397 playouts];
W[bk]
C[72.4% (-0.8%)
1.3k playouts];
B[dj]
C[27.7% (0.0%)
1.3k playouts]
(;
W[al]
LB[ld:A]
C[61.0% (-11.4%)
1.8k playouts

Slow move (huge winrate drop).  Instead I should tenuki and protect the top side.  Frankly, this is just an endgame move.];
B[kd]
C[36.2% (-2.8%)
593 playouts]
(;
W[lc]
LB[ld:A]
C[54.4% (-9.4%)
637 playouts

Leela doesn't like this move, although I don't quite understand why.

With this kosumi I have made the top group alive, while still threatening to cut at A.];
B[ie]
C[45.1% (-0.5%)
812 playouts];
W[ld]
C[47.8% (-7.0%)
648 playouts];
B[le]
C[53.0% (0.9%)
1.9k playouts];
W[je]
C[46.9% (-0.0%)
1.5k playouts];
B[ke]
C[53.1% (0.0%)
1.6k playouts];
W[jd]
C[46.5% (-0.4%)
1.1k playouts];
B[kc]
C[53.5% (-0.0%)
1.2k playouts];
W[kb]
LB[ld:B][me:A]
C[45.8% (-0.8%)
938 playouts

My winrate dropped more than 20% in the fight on the upper side.  However, in the game I felt very good about this result, because I had cut through Black's wall.  In hindsight I guess White is not successful here, because White has lost a lot of points compared to just defending at L16 (B) after Black played the knight's move at A.];
B[jc]
C[48.0% (-6.2%)
403 playouts

Slow move.  I should not have answered this.  I should have utilized this chance to make a few sente moves and invade the right side.]
(;
W[ib]
C[42.0% (-10.0%)
1.9k playouts

I played some slack moves here.];
B[qj]
LB[oi:A][pl:B][pn:C]
C[56.0% (-2.0%)
535 playouts

The jump at A might be a little better for Black.  Black playing R10 strengthens my group and eliminates aji at B or C.];
W[rk]
LB[pk:A][pl:B][pn:C]
TR[ib][rk][iq]
C[43.6% (-0.4%)
2.0k playouts

Extending on top at A might be better for me, because it eliminates attachments at B or C.  Throughout this game I was very fixated on points (moves like J3, J18, and now S9), but these moves ended up costing me more than I got from them.];
B[pk]
C[54.7% (-1.7%)
3.5k playouts];
W[pl]
C[45.5% (0.1%)
3.6k playouts];
B[ok]
C[53.3% (-1.2%)
10.0k playouts];
W[ds]
C[41.1% (-5.5%)
1.3k playouts];
B[cr]
C[58.9% (0.0%)
1.5k playouts]
(;
W[mh]
LB[kh:C][ni:B][oi:A]
C[40.1% (-1.0%)
367 playouts

I thought about this move for a few minutes.  I wanted to play at A directly but I was afraid to get punished with B.

Leela agrees with my decision (one of my few highlight moves).

With this reduction I aim to further harass Black at A and if I need to escape I have an exit at C.];
B[lg]
C[56.5% (-3.4%)
216 playouts];
W[oi]
C[44.5% (1.1%)
208 playouts];
B[ph]
C[54.8% (-0.7%)
158 playouts];
W[oh]
C[45.0% (-0.3%)
185 playouts];
B[og]
C[56.9% (1.9%)
101 playouts];
W[ng]
C[41.7% (-1.4%)
102 playouts];
B[of]
C[58.3% (-0.0%)
287 playouts]
(;
W[sh]
LB[mk:A]
C[32.3% (-9.4%)
468 playouts


Wrong timing.  I thought this was a sente move but capping at A is the most urgent right now.  Again, I was too fixated on points.]
(;
B[jb]
C[65.5% (-2.2%)
250 playouts

This might have been a timesuji, but it is not sente.];
W[sf]
LB[ka:A][rc:B]
C[23.5% (-10.9%)
101 playouts

White got to play here first.  If Black plays atari at A then White can escape at B to kill the corner.

The winrate here criticizes White sharply, but that is due to the urgency of a move in the center.  Locally White is very happy to get T14 sente.];
B[rg]
C[77.9% (1.4%)
78 playouts];
W[sg]
C[26.2% (4.0%)
251 playouts];
B[re]
C[74.3% (0.4%)
419 playouts];
W[ja]
C[27.0% (1.3%)
2.5k playouts];
B[ic]
C[72.6% (-0.4%)
626 playouts];
W[hc]
C[28.0% (0.6%)
2.0k playouts]
(;
B[mk]
LB[lj:A]
C[64.8% (-7.3%)
773 playouts
This move is too soft.  A placement at A would be more severe.];
W[ki]
C[33.6% (-1.6%)
1.2k playouts];
B[ed]
C[69.1% (2.7%)
125 playouts

Finally Black got this exchange.  I had many opportunities to play it but I kept saving it until it was too late.];
W[ec]
C[30.4% (-0.5%)
761 playouts]
(;
B[ji]
C[62.3% (-7.3%)
225 playouts

This move is too direct.  Black can't actually make a lot of points on the left side.  I was very shocked that Sankin played here, because I thought he would definitely try to keep attacking me.]
(;
W[jj]
LB[kh:A]
C[31.8% (-5.9%)
393 playouts

However, I also didn't play the optimal move.]
(;
B[kj]
LB[ij:A]
C[68.2% (0.0%)
315 playouts

The hane is probably better.  Black can get more territory that way.];
W[kh]
C[32.9% (1.2%)
476 playouts];
B[ij]
C[58.0% (-9.1%)
105 playouts];
W[jk]
C[41.0% (-1.0%)
251 playouts];
B[jh]
C[51.6% (-7.5%)
1.2k playouts]
(;
W[lj]
LB[ik:A]
C[42.3% (-6.2%)
234 playouts

The fight in the center essentially decided this game.  I made a sequencing mistake here.  I should have played the turn at A first before the atari here.


When I played here I thought that White did not have a bad position, but actually Black still had a slight advantage.];
B[kk]
C[58.1% (0.4%)
296 playouts];
W[lk]
C[40.9% (-1.0%)
441 playouts];
B[kl]
C[59.3% (0.1%)
661 playouts];
W[ll]
C[42.0% (1.3%)
3.7k playouts];
B[km]
C[58.9% (1.0%)
2.7k playouts];
W[ik]
C[41.3% (0.3%)
1.8k playouts];
B[hk]
C[59.4% (0.7%)
1.8k playouts];
W[il]
C[41.6% (1.0%)
3.6k playouts]
(;
B[hi]
LB[hl:A]
C[51.7% (-6.7%)
308 playouts

Black can maintain a small lead with A.  This move is slack.];
W[hl]
C[50.5% (2.2%)
2.5k playouts]
(;
B[lm]
LB[pj:A][gk:B]
C[47.5% (-2.0%)
380 playouts

The turn and the exchanges following the turn were Black's losing moves.  They helped White strengthen the center group and left the cut at A wide open.  If Black defends at B it is still an even game.];
W[ml]
C[52.2% (-0.3%)
1.1k playouts];
B[sj]
C[35.2% (-12.7%)
799 playouts];
W[rj]
C[65.5% (0.7%)
789 playouts];
B[ri]
C[34.4% (-0.1%)
881 playouts];
W[si]
C[59.8% (-5.8%)
366 playouts];
B[ql]
C[42.9% (2.6%)
2.7k playouts];
W[rl]
C[57.1% (-0.0%)
3.0k playouts];
B[mm]
C[37.6% (-5.3%)
141 playouts];
W[nl]
C[57.5% (-4.9%)
309 playouts];
B[gl]
C[39.5% (-3.0%)
229 playouts];
W[gk]
C[58.3% (-2.2%)
188 playouts];
B[hj]
C[41.6% (-0.1%)
325 playouts];
W[gm]
C[59.5% (1.1%)
324 playouts];
B[fl]
C[40.2% (-0.3%)
420 playouts];
W[fm]
C[62.1% (2.2%)
339 playouts

After this center interaction settled Black never got a chance to fight back.  However, there were mistakes on both sides and I will point out the important ones.]
(;
B[el]
LB[ir:A]
C[34.9% (-3.1%)
295 playouts

Black would find more opportunities playing at A rather than here.]
(;
W[jn]
LB[ir:B][kr:A]
C[61.8% (-3.3%)
169 playouts

Shape mistake.  I should take this chance to make some exchanges at A first.];
B[ko]
C[27.9% (-10.3%)
159 playouts];
W[jo]
LB[jq:A][ir:C][kr:B]
C[63.9% (-8.1%)
623 playouts

Also wrong shape.  A or B is proper.

With this move I gave Black a chance to make a counter attack at C.]
(;
B[jr]
LB[ir:A]
C[22.1% (-14.0%)
360 playouts

Another losing move.  The game is still close with A (maybe a half-point game)];
W[ig]
C[77.6% (-0.3%)
51 playouts];
B[hh]
C[21.1% (-1.2%)
152 playouts];
W[hg]
C[83.3% (4.4%)
189 playouts];
B[gg]
C[15.6% (-1.1%)
550 playouts];
W[ir]
C[85.0% (0.6%)
2.1k playouts

After this White has finally prevailed.  The winning margin is not big but there is no place for Black to make a comeback now.];
B[po]
C[12.5% (-2.5%)
178 playouts];
W[pn]
LB[qn:A]
C[86.4% (-1.0%)
532 playouts

A is probably the better endgame move.];
B[oj]
C[15.9% (2.3%)
1.1k playouts];
W[rh]
C[79.6% (-4.5%)
71 playouts];
B[qh]
C[19.7% (-0.6%)
163 playouts];
W[rf]
C[83.3% (3.0%)
273 playouts];
B[qf]
C[15.6% (-1.1%)
250 playouts];
W[qg]
C[84.7% (0.3%)
1.3k playouts];
B[pg]
C[15.6% (0.3%)
975 playouts];
W[ol]
LB[bd:A]
C[78.6% (-5.8%)
745 playouts

I knew the connection was unnecessary but I was certain that I would win so I played a very defensive move.  However, I was not actually winning by that much (less than komi) so I still should have played at A.];
B[hb]
C[23.6% (2.2%)
230 playouts];
W[ia]
C[78.1% (1.7%)
1.0k playouts];
B[ro]
C[17.7% (-4.2%)
34 playouts];
W[qn]
C[82.9% (0.6%)
691 playouts];
B[em]
C[15.9% (-1.2%)
48 playouts];
W[en]
C[81.7% (-2.5%)
542 playouts];
B[ab]
C[18.5% (0.2%)
180 playouts]
(;
W[bb]
LB[kp:A]
C[71.6% (-9.9%)
623 playouts


Another slow move (again, I thought I was winning).  I should have made some exchanges in the bottom first at A.  The game is getting really close now.];
B[jp]
C[24.2% (-4.2%)
158 playouts];
W[ip]
C[74.6% (-1.2%)
292 playouts];
B[jq]
C[27.1% (1.7%)
2.2k playouts];
W[ih]
C[72.9% (-0.0%)
538 playouts];
B[ii]
C[26.8% (-0.4%)
738 playouts];
W[kn]
C[67.3% (-6.0%)
256 playouts];
B[lo]
C[32.1% (-0.7%)
545 playouts];
W[nn]
C[73.0% (5.1%)
534 playouts]
(;
B[im]
TR[mo]
C[21.5% (-5.5%)
1.1k playouts

Final losing move.  It doesn't actually work.

It would be a half-point game if Black just plays at N5.];
W[jm]
C[82.5% (4.0%)
951 playouts];
B[hm]
C[18.8% (1.2%)
752 playouts];
W[jl]
C[80.0% (-1.2%)
896 playouts];
B[hn]
TR[nn]
SQ[kj][kk][kl][km][lm][mm]
C[22.6% (2.6%)
958 playouts

Locally Black profits a lot, but with the O6 stone White can trade and kill a small group in the center.  Black doesn't actually gain anything.];
W[ln]
C[78.8% (1.3%)
1.2k playouts];
B[fn]
C[14.0% (-7.2%)
613 playouts];
W[mo]
C[87.5% (1.5%)
676 playouts];
B[mp]
C[12.0% (-0.5%)
926 playouts];
W[go]
C[87.0% (-1.0%)
162 playouts];
B[gn]
C[12.8% (-0.1%)
580 playouts];
W[js]
LB[lp:A]
C[87.8% (0.6%)
834 playouts

Minor mistake.  I first should have played the atari at A to avoid complications.]
(;
B[lr]
C[5.3% (-6.9%)
1.4k playouts];
W[ho]
LB[ls:A]
C[91.5% (-3.2%)
352 playouts

Actually also a slack move, but this time there is no comeback for Black.

Strictly speaking A is the bigger endgame.];
B[no]
C[8.3% (-0.1%)
48 playouts];
W[mn]
C[91.7% (0.1%)
298 playouts];
B[ks]
C[9.1% (0.9%)
1.0k playouts];
W[rs]
LB[bb:B][ol:A]
TR[im]
C[85.6% (-5.3%)
2.1k playouts

After the game ended I was very shocked that I was only up by 4.5 points (I thought I was at least winning on the board).  It gave me a cold chill, because it would still be anybody's game if Black didn't make the trade with J7.  I really conceded too much in endgame and I will be very careful about doing this in the future.  I almost threw a won game with A and B.];
B[aj]
C[9.6% (-4.8%)
2.0k playouts];
W[bm]
C[90.4% (-0.1%)
2.0k playouts];
B[is]
C[8.8% (-0.8%)
469 playouts];
W[hs]
C[91.5% (0.3%)
751 playouts];
B[hr]
C[6.0% (-2.5%)
274 playouts];
W[js]
C[89.8% (-4.1%)
592 playouts];
B[md]
C[13.4% (3.2%)
1.3k playouts];
W[mc]
C[87.3% (0.6%)
1.7k playouts];
B[is]
C[12.5% (-0.2%)
1.7k playouts];
W[gs]
C[88.6% (1.1%)
1.3k playouts];
B[cs]
C[10.2% (-1.2%)
1.7k playouts];
W[ad]
LB[gr:A]
C[82.2% (-7.6%)
911 playouts


I actually forgot that G2 makes a ko in the bottom so I tenuki to play here.  Fortunately, White has enough ko threats so Black can't win the ko at A.];
B[bd]
C[18.2% (0.3%)
978 playouts];
W[bc]
C[82.0% (0.2%)
1.0k playouts];
B[ae]
C[7.1% (-10.9%)
767 playouts];
W[es]
C[83.3% (-9.6%)
1.1k playouts


I came back here to simplify the game.  The exchanges I made in upper left corner was neutral.];
B[ac]
C[7.0% (-9.7%)
2.6k playouts];
W[rc]
C[93.5% (0.5%)
1.8k playouts];
B[rb]
C[6.7% (0.2%)
1.9k playouts];
W[pa]
C[93.5% (0.2%)
5.9k playouts];
B[ra]
C[2.5% (-4.0%)
2.6k playouts];
W[jg]
C[96.9% (-0.5%)
433 playouts];
B[hf]
C[2.5% (-0.6%)
662 playouts];
W[gh]
C[97.1% (-0.5%)
112 playouts];
B[gj]
C[2.9% (-0.1%)
144 playouts];
W[fg]
C[96.6% (-0.5%)
158 playouts];
B[gf]
C[3.0% (-0.4%)
1.1k playouts];
W[nj]
C[97.8% (0.8%)
1.6k playouts];
B[fo]
C[1.5% (-0.7%)
108 playouts];
W[fp]
C[98.8% (0.2%)
992 playouts];
B[nk]
C[1.9% (0.6%)
334 playouts];
W[mj]
C[98.1% (-0.1%)
611 playouts];
B[pj]
C[2.0% (0.0%)
1.4k playouts];
W[qs]
C[98.0% (-0.1%)
245 playouts];
B[ps]
C[2.0% (-0.1%)
825 playouts];
W[ao]
C[95.2% (-2.9%)
56 playouts];
B[ap]
C[2.1% (-2.7%)
146 playouts];
W[an]
C[98.3% (0.3%)
780 playouts];
B[in]
C[2.2% (0.5%)
112 playouts];
W[io]
C[98.3% (0.5%)
1.6k playouts];
B[kg]
C[1.9% (0.2%)
382 playouts];
W[lh]
C[97.5% (-0.7%)
624 playouts];
B[nf]
C[1.3% (-1.3%)
201 playouts];
W[mg]
C[96.8% (-1.9%)
604 playouts];
B[se]
C[1.1% (-2.1%)
287 playouts];
W[sk]
C[98.1% (-0.8%)
955 playouts];
B[dm]
C[1.0% (-0.9%)
261 playouts];
W[dn]
C[98.9% (-0.1%)
1.1k playouts];
B[rg]
C[1.2% (0.1%)
394 playouts];
W[sj]
C[99.2% (0.4%)
1.5k playouts];
B[nd]
C[0.7% (-0.1%)
1.3k playouts];
W[ak]
C[99.4% (0.1%)
354 playouts];
B[ai]
C[0.8% (0.2%)
1.0k playouts];
W[oo]
C[99.4% (0.1%)
596 playouts];
B[op]
C[0.7% (0.0%)
655 playouts];
W[on]
C[98.9% (-0.4%)
1.3k playouts]
(;
B[js]
LB[ba:A]
C[0.5% (-0.6%)
739 playouts

Normally Black would make an exchange in the top left to create a ko.  It's a little better than the game but still it wouldn't change the result (it might in a half-point game).];
W[ba]
C[99.4% (-0.1%)
898 playouts];
B[qg]
C[1.1% (0.5%)
910 playouts];
W[fc]
C[99.7% (0.8%)
622 playouts];
B[dl]
C[0.3% (-0.0%)
945 playouts];
W[oa]
C[99.8% (0.0%)
1.5k playouts];
B[sc]
C[0.2% (-0.0%)
1.5k playouts];
W[kf]
C[99.7% (-0.1%)
1.1k playouts];
B[lf]
C[0.2% (-0.1%)
3.8k playouts];
W[aa]
C[99.8% (0.0%)
1.8k playouts];
B[ad]
C[0.3% (0.1%)
3.2k playouts];
W[if]
C[99.8% (0.1%)
2.7k playouts];
B[pi]
C[0.2% (0.0%)
1.6k playouts];
W[qa]
C[99.8% (-0.0%)
2.4k playouts];
B[mf]
C[0.2% (0.0%)
61k playouts

White wins by 4.5 points.]
)
    (;
    B[ba];W[ca];B[js];W[aa]
    C[A ko will ensue in the top left.]
    )
)
    (;
    B[ks];W[lp];B[lq];W[kp];B[is]
    C[Black can choose to take sente this way (not that this would change the outcome of the game).]
    )
)
    (;
    B[mo]
    C[Because of my slack moves earlier the game is very close right now. 

I thought I was ahead by more than I was so the final outcome was almost reversed.]
    )
)
    (;
    W[kp];B[lp];W[jp];B[lr];W[bb]
    C[This is the right sequence.]
    )
)
    (;
    B[ir];W[jq];B[jr];W[hr]
    C[This is a very big sente sequence for Black.]
    )
)
    (;
    W[kr];B[jr];W[jq];B[lr];W[kp];B[lq];W[jn]
    C[White can secure victory here.]
    )
)
    (;
    B[ir];W[jr];B[jq];W[kr];B[ip];W[hq];B[lr];W[hr];B[in];W[hn];B[im];W[el];B[fk];W[hm];B[nm]
    C[The game is still very close if Black plays this way.]
    )
)
    (;
    B[gk];W[kr];B[lr];W[jr];B[nm]
    C[The game is roughly even and will be decided in endgame.]
    )
)
    (;
    B[hl];W[im];B[hi]
    C[Black still has a small lead.]
    )
)
    (;
    W[ik]
    LB[lj:A][hk:C][kk:B]
    C[Without the exchanges in A and B Black's double hane at C is not as severe.];
    B[hj];W[hk];B[gj];W[lj]
    C[White gets really good shape and would have reversed the game like this.]
    )
)
    (;
    B[ij];W[kh];B[ih]
    C[White's hane simply helped Black.]
    )
)
    (;
    W[kh]
    C[Better.];
    B[jj];W[jh];B[ih];W[ig];B[hh];W[hg];B[gg]
    C[This is a great sequence for White when compared to the game.]
    )
)
    (;
    B[ii]
    C[The orthodox cap here is better.]
    )
)
    (;
    B[lj]
    C[Severe move.];
    W[ki];B[li];W[lh];B[kh];W[kg];B[jh];W[lf];B[ji];W[jg]
    C[Black gains a lot more here than in the game.]
    )
)
    (;
    B[lj]
    C[Black should ignore my monkey jump and severely attack my group here.]
    )
)
    (;
    W[ed];B[de];W[mk]
    C[This is roughly an even game (after Black profited a lot in the upper side Black now has a small advantage).]
    )
)
    (;
    W[oi];B[ni];W[nh];B[mi]
    C[I don't know if I can escape.]
    )
)
    (;
    W[ed];B[de];W[gh];B[fh];W[ph]
    C[This is the urgent spot.]
    )
)
    (;
    W[ld];B[ke];W[le];B[kf];W[lf];B[kg];W[kc];B[lc];W[jd];B[kb];W[jc];B[md];W[mc];B[mg];W[lb]
    LB[ld:A]
    C[I thought about A and I didn't like the prospect of being sealed in.  Regardless, this is the AI's recommended move.]
    )
)
    (;
    W[ld]
    C[This is the urgent place.]
    )
)
    (;
    W[ld];B[le];W[ke];B[md];W[lc];B[kf];W[pi]
    C[I was afraid of getting sealed in, but even if that does happen I can get sente to reduce Black's right side.  White still has a fuseki lead in this situation.]
    )
)
    (;
    W[ed];B[de];W[nd]
    C[This is the proper move (honte).]
    )
)
    (;
    B[em]
    C[Better.];
    W[en];B[jf]
    LB[qm:A]
    C[The game is roughly even right now.  White has a weakness at A.]
    )
)
    (;
    W[pr]
    C[The correct move.]
    (;
    B[or];W[pp]
    (;
    B[ps];W[oq]
    (;
    B[pr]
    C[This is much better for White than the game (had Black not made the exchange).]
    )
        (;
        B[nq]
        C[This is the optimal variation for both sides.];
        W[ed];B[de];W[pr]
        C[Because White has ko threats in the bottom left and the top right, White is not afraid to fight this ko (note the exchange in the top left denies Black of one ko threat).]
        )
    )
        (;
        B[oq]
        C[Connecting here is also bad for Black.];
        W[rr];B[ps];W[ed];B[de];W[nd]
        C[The sente exchanges were very good for White.]
        )
    )
        (;
        B[rr];W[mp]
        C[If Black descends then a move around here is quite troublesome for Black.]
        )
    )
)
    (;
    B[pc]
    C[This is the better way.];
    W[qd];B[qe];W[re];B[rf];W[qf];B[pe];W[rg];B[rd];W[sf];B[rc]
    C[Blocking at this side reduces White's territory on the top, which is more than what White will have on the right side.]
    )
)
    (;
    W[nc];B[qf];W[pc];B[qc];W[qb]
    C[Something like this ensures that White has a sizeable territory on the top.]
    )
)
    (;
    B[bh]
    C[This fails.];
    W[ed];B[de];W[ek]
    LB[eg:A][dh:B]
    C[There's bad aji around A and B.  This result is similar to the game.]
    )
)
    (;
    B[bd]
    (;
    W[bc];B[cn]
    C[This is bad for White.]
    )
        (;
        W[cj]
        TR[cc][dc][bd][cd][dd][ce]
        C[White has to come back here, but now the exchange at C16 may not be good for me.]
        )
    )
)
    (;
    B[ck];W[fg];B[ie];W[ei];B[jd];W[ej]
    C[Fighting will ensue.]
    )
)

