(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
GN[2020 Meijin C Qualification]PW[Taniguchi Toshinori]PB[Antti]WR[7p]BR[1p]DT[2019-12-05]CP[Antti Törmänen]EV[2020 Meijin C Qualification]RO[1]C[2020 Meijin C Qualification
Round 1

White: Taniguchi Toshinori 7-dan
Black: Antti 1-dan
]RE[B+Resign]CH[1]
;B[qd]
;W[dc]C[I was looking forward to getting to use the same fuseki I experimented with at the Karuizawa Camp, but white d17 unfortunately prevented that plan.]
;B[cp]
;W[pq]
;B[qo]
;W[op]
;B[fq]
;W[oc]
;B[pc]C[Recently I have been in a territorial mood while playing, so q17 seemed to come naturally here.]
;W[od]
;B[qf]
;W[df]LB[kd:A][de:B]C[Something like white A instead might be standard, but then black would be happy to get to play in the last corner with B. White d14 tries to keep white's speed up.]
;B[kc]C[Black's pincer is then a given.]
(;W[og]LB[ic:A]C[I had expected white A instead. See variation.]
;B[hc]C[I was happy with black's opening with h17. The AI also prefers black.]
;W[ph]
;B[pl]
;W[on]
(;B[pn]LB[qm:A]C[During the game I was wavering between this move and A, and finally opted for the proactive choice. To my surprise, the AI prefers A instead. See variation.]
;W[om]
;B[ol]
;W[qp]LB[ql:C][pm:A][qm:B]C[White sets up the A-B-C cut.]
;B[pj]LB[qk:D][ql:C][rl:E][pm:A][qm:B][rm:F][ro:G]C[Black defends the A-B-C cut: black is fine with D-E-F.

Later in the game, white may aim at the B-A-G endgame, but that weakens white's outer position considerably so the timing of the sequence is difficult.]
;W[pe]
;B[qe]
;W[qi]LB[of:C][pf:B][qh:D][pm:A]C[White still aims at the A cut. Also, this prevents black's B-C-D connection.]
;B[qj]
;W[ob]
;B[pb]
;W[ke]C[The first exchange is more or less finished with l15, and the game is still fairly even.]
;B[mc]LB[ne:A]C[I wanted to keep the white group weak with this move, aiming at the A peep next. However...]
;W[md]LB[mc:A]C[...I didn't realise that white had such a good defence available. White's shape looks thin, but is in fact rock solid. A-n16 is probably finally a bad exchange for black.]
(;B[ch]LB[ld:A]C[See variation for why black A does not work.]
;W[dk]
(;B[dd]LB[ce:A]C[D16 was probably a minor overplay; black should play more modestly with A instead. See variation.]
;W[ed]
;B[cd]
;W[cc]
;B[bc]
;W[fc]TR[hc][kc][mc]C[White is happy to play this move, as now the black upper-side group is getting increasingly weak. Black basically pushed white to attack the upper-side black group.]
;B[be]
;W[he]
(;B[gb]LB[fb:A]C[During thegame I was aware that the AI would do something more 'efficient' here, possibly the A attachment; and I decided that since I don't understand what the AI would actually try to accomplish, I'll play the easy-to-understand, maybe-slightly-inefficient human move. This turned out to be a good choice.

See variation for A, which indeed was the AI's choice.]
;W[hq]
;B[ip]LB[ee:E][di:A][mk:D][nk:C][nl:B]C[During the game I was proud of finding this j4 move. It seemed to me that white was gradually starting to build centre influence: for example white A would probably require a black response in the upper-left corner, and something like white B, black C, white D would also be annoying for black to handle. Therefore I played the centre-conscious j4 that allows white to get some lower-side territory if he wants to (black anyway has a territorial lead), and which makes white's subsequent play in the centre complicated. My opponent grunted a little after seeing this move, and spent a good while thinking about white's response.

The AI, of course, thinks that j4 is a terrible move. (The AI would start a fight with the E hane.)]
;W[hp]
;B[io]
;W[ho]
;B[in]
;W[fo]LB[jr:A]C[According to the AI, if white plays A instead, black didn't really accomplish anything worth mentioning. F5 is no good, as –]
;B[iq]C[– now black's third-line block is quite severe. The white group in the lower-left corner is getting under pressure.

However...]
;W[dq]C[...white's counter-invasion was annoying, and I started doubting whether the whole lower-side sequence was worth playing at all.]
(;B[cq]LB[dp:A]C[Black would like to play A instead, but it seems to be no good. See variation.]
;W[eq]
;B[do]
(;W[nl]LB[cr:A]C[White should probably have played A instead in the corner. See variation.]
;B[nk]
;W[ml]
;B[mk]LB[ep:B][fr:A][hr:C]C[The AI thinks black should instantly return to the lower-left corner to play A, which makes a miai of B and C. I considered this, but was not sure if the lower-side black group could then manage the inevitable white attack, so I kept playing moves that I felt confident about.]
;W[ll]
;B[il]LB[ep:C][fr:A][hr:B]C[The AI would still play A instead; and I still wouldn't know how to manage it when white responds with something like B-C-j8. (I lost a lot of games like that at the study camp.)]
;W[hm]
;B[im]
;W[kq]
;B[kp]
;W[lq]
;B[lp]
;W[mq]
;B[fr]C[Now f2 becomes a kind of tedomari; there are no moves remaining on the board that are quite as big by comparison. The AI thinks black takes the lead here.]
;W[hr]
;B[fp]
;W[fb]
;B[ib]LB[gb:A]C[This was always the plan with black A.]
;W[eh]
;B[gk]C[I was happy to see that black's play here is spot on, according to the AI.]
;W[fl]
;B[fk]
;W[ek]
;B[gl]
;W[gm]
;B[jj]
;W[bf]C[This is a weak point in this black shape, but the black group in itself can withstand the attack.]
;B[bg]
;W[cf]
;B[af]
;W[bb]LB[ca:D][cb:B][db:C][bi:A]C[If white tried for example A instead, black would play B-C-D in the corner, and white would be unable to reduce black to one eye. Therefore, b18 is correct.]
;B[ab]
;W[ba]
;B[di]LB[bk:A]C[This sequence was no good in retrospect. Black should probably simply have slid to A instead, as the group could anyway live. ]
;W[ei]
;B[ck]
;W[cl]
;B[cj]
;W[dl]C[Initially I thought white would end up with bad shape, but this empty triangle is actually quite the good move.]
;B[bi]
;W[eo]
;B[ep]C[The lower-left corner white group is now practically unattackable.]
;W[lk]
;B[fm]
;W[em]
;B[el]
;W[fn]
;B[pm]LB[hi:B][lj:A]C[Black would like to play A instead, but the aji with the cutting points (q7 included) would simply be too bad.

I thought q7 was an efficient move, as now the right side can be called black territory, and the centre black group will anyway not die. However, now black gets under a surprising amount of pressure.

The AI would simply make shape with something like B instead, and the game would be a little good for black (70%ish).]
;W[rp]
;B[lj]
;W[mj]
;B[li]
;W[nj]
;B[ok]
;W[oi]
;B[ro]
;W[hi]LB[ji:C][ij:A][ik:B]C[This move was extremely annoying. White aims at playing A-B-C next, which removes most of black's local eye shape; but black has no obvious good move to prevent white's sequence.]
;B[ln]LB[nm:A]C[This move is sente because of the A cut.]
;W[mn]
;B[ij]LB[jh:A][jk:B][hl:C]C[This was my solution in the game; according to my reading, black's group just about makes clear two eyes.

The AI thinks that black's play is inefficient, and that black should play something like A instead, then allowing white to capture black's centre stones with something like j10-B-C (I also imagined this during the game). The AI probably has a good follow-up against the upper-right corner white group in mind, but because I couldn't see it, I again chose the move that I myself understood.]
;W[jh]
;B[kk]C[Black is alive, but now white can suddenly expect some amount of territory in the centre. The game again becomes close.]
;W[pa]
;B[qa]
;W[na]
;B[oa]
;W[kl]
;B[jl]
;W[pa]
;B[rb]C[I figured that black cannot realistically fight this ko; and anyway, the upper-side black group is under no threat of dying.]
;W[lb]
;B[kb]
;W[so]
;B[sn]
;W[sp]
;B[rm]
;W[lc]
;B[kd]
;W[ld]
;B[je]
;W[kf]
;B[jf]LB[ie:A]C[This push was poor shape; the A bump instead is probably better.]
;W[jg]
;B[id]TR[je][jf]C[Black needs to play here, or otherwise white j16 would catch the marked stones in sente.]
;W[mh]
;B[ff]LB[ir:A]C[F14 is again a terrible move according to the AI, but I am notwithstanding quite proud of it.

I figured that if I played endgame as usual – for example the block of A next – the score would be close, but then the game might go either way. The opponent was in byo-yomi at this point while I had in excess of 90 minutes left, so I read out a complicated fighting sequence in the centre that does not just leave white with an obvious refutation.]
;W[gc]LB[fa:B][ga:A][ff:C]C[White fell in my trap. g17 is the move that one instinctually wants to play, as white A next is big – and black's response of B is gote. Therefore, it looks like white is weakening C in sente.]
;B[fa]
;W[ea]
;B[ga]C[I had read ahead that after g19, white still has no easy way to catch the centre black stone. Furthermore, black has actually now made a two-point profit on the upper side.]
;W[ee]TR[ea][fa][ga][gc]C[If white had omitted the marked exchange, then e15 would have been a fine move. Now white took a territorial loss, and also –]
;B[eb]C[– is actually a little bit under pressure when black removes white's base in sente.]
;W[da]
;B[db]
;W[ca]
;B[hf]
;W[gf]LB[ge:A]C[g14 looks like a hard-working move, but is actually an overplay. I still had 70 minutes remaining at this point, so I took my time to read the sequence out before playing it.

White probably had to play A instead, but then the game would anyway favour black.]
;B[ge]
;W[if]
;B[gg]
;W[ie]
;B[jd]C[The opponent seemed surprised at this connection; presumably his read sequence had been something else.]
;W[ig]
;B[gd]
;W[hd]
;B[dg]
;W[eg]
;B[ef]
;W[de]
;B[gi]
;W[gj]
;B[hh]LB[ff:D][gf:C][hg:A][fj:B]TR[ba][ca][da][ea][bb][fb][cc][dc][fc][gc][ed][de][ee][bf][cf][df]C[Black links up and the upper-left corner white group is captured. (Or technically, a ko is formed: white A, black B, white C is locally correct.) White resigns.

Just judging from my analysis of the game with the AI, it actually seemed like this game was of worse quality than my other recent tournament games. But on the other hand, this game I managed to keep even throughout, and even the decisive 'challenge' which black put up with D worked out just the way I had envisioned (or hoped).

Now at the latest it seems clear to me that humans cannot just blindly copy the AI's way of playing, but must choose their moves according to what makes sense to oneself.])
(;W[cr]
;B[br]
;W[dr]LB[fq:A][fr:B][gr:C][hr:D][ir:E]C[Now the black A stone is captured. If black tries to create double with B, white C wins the capturing race.

However, now black can play D-C-E-F in sente at any time, so his lower-side group is a lot stronger than it looks.]
;B[dm]C[I figured that with this, the game should be fair to both players. The AI agrees.]))
(;B[dp]
;W[eq]
;B[ep]
;W[fr]
;B[gr]C[Black has to cut white apart or the whole sequence loses its value.]
;W[fp]
;B[gq]
;W[hr]
;B[er]
;W[dr]
;B[fs]
;W[br]C[However, it does not look like black can manage to capture the white stones cleanly.]
;B[bq]
;W[cr]
;B[ar]
;W[hs]
;B[gs]
;W[ds]
;B[bs]
;W[es]LB[iq:A]TR[hr][hs]C[It looks like the corner will end up in a ko fight. And the deal breaker for black is that white already got the triangle-marked stones in place, which makes the black A group a lot weaker.]))
(;B[fb]
;W[gb]
;B[eb]
;W[gc]
;B[ec]
;W[fa]
;B[ee]
;W[fd]
;B[cb]TR[hc][kc][mc]C[This is apparently good for black; could somebody tell me what on earth is going on with the upper-side black stones? Are they a sacrifice, or a group that white cannot capture efficiently?

I don't know, and hence I didn't play this way in the game.]))
(;B[ce]
;W[cf]
;B[bf]
;W[de]
;B[bd]
;W[cd]
;B[be]C[This way black keeps playing a territorial game, and doesn't end up hurting his own upper-side group.]))
(;B[ld]
;W[le]
;B[me]
;W[nd]LB[mf:A]C[White must hang in tough with this connection. If white plays A instead, black gets a locally good result with the o16 capture.]
;B[mf]
;W[jd]C[This sente move is the key.]
;B[jc]
;W[lg]
;B[nh]
;W[ng]
;B[mg]
;W[mh]
;B[lf]
;W[kg]C[Black's stones end up captured with almost no aji to use.]))
(;B[qm]
;W[qk]C[I disliked the fact that white A seems to hit the black group's weak point.]
;B[pk]
;W[qj]
;B[rq]
;W[kq]C[The AI, however, thinks black is fine in this game; and in retrospect, black's shape probably is more comfortable than in the game.]))
(;W[ic]LB[kc:A]C[In my opinion, white should play here to prevent the black A stone from settling too easily.]
;B[of]LB[ic:A][ke:B][og:C]C[If black answered white A with B, then white could jump to C with good flow. However, I had planned to play p14.]
;W[pn]LB[id:B][ld:A][pl:C]C[If white ran immediately out with A, black would initiate sabaki with B, and black would probably expect to get sente to first play around C on the right side. Therefore, I expected white to start by forcing q6.]
;B[qm]LB[ke:A][qn:B]C[Black A instead is probably not good, as white B claims the lower-right corner too comfortably.]
;W[ld]
;B[id]
;W[hc]
;B[kd]
;W[lf]
;B[ke]LB[pm:A]C[I expected something like this to follow. Now black fights to get sente to return to A first.]))
