(;FF[4]
CA[UTF-8]
GM[1]
GN[KataGo 7 komi self-play - game 12]
PC[https://online-go.com/review/458154]
PB[KataGo]
PW[KataGo]
BR[9p]
WR[9p]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[7]
RU[NZ]

;B[pd]
;W[dp]
;B[dc]
;W[qp]
;B[oq]
;W[pq]
;B[op]
;W[qn]
;B[kp]
;W[de]
;B[ce]
;W[cf]
;B[cd]
;W[df]
(;B[fd]TR[ec]C[This has a little bit more potential to develop along the top, maybe. It leaves a little bit more aji with the cross-attachment at E17, which we're gonna see threatened later on (all comments on this game by Anton Christenson, EGF 3d).]
;W[dj]
;B[fq]
(;W[er]TR[dj]SQ[cl]SQ[cn]C[Here, we see a slightly unusual move. I've seen this called a footsweep sometimes: it's sort of like a kick, but even lower. It's sort of similar in intent: it still aims to keep the corner, blocks black from sliding in; but doesn't touch black directly, so doesn't help the stone make shape. A footsweep can usually be played when white already has a stone around D10 or similar. Since white didn't respond on the left, it's very comfortable for black to immediately approach from the other side as well and there will be some weakness in the corner; and then it's good that white has a stone around D10 that already acts as a pincer to the C6 stone, which can at most make a one-space extension to C8. It's an even result.]
;B[cn]
(;W[hc]
(;B[gc]TR[hc]C[Black kicks to put maximum pressure on H17, but right now, white doesn't actually have to time to keep playing with that stone. White just wanted to check how black wanted to handle this area and then white is going to return to the lower side. H17 is going to come into play later on.]
;W[iq]
(;B[cl]
;W[jo]
;B[bj]
(;W[ci]C[Rather than following up with the attack directly, white deems it more important to protect this group.]
;B[fn]
;W[mp]
;B[ko]
;W[co]
;B[dn]
(;W[dd]C[For now, white is gonna take another sort of probing move up here. This is really common after this joseki even with the normal F17 jump and is often played quite early.]
(;B[cc]
(;W[lq]
;B[pm]
(;W[qm]
(;B[kq]
;W[mn]
;B[km]
;W[lm]
;B[jn]
;W[kr]
;B[jr]
(;W[mr]TR[or]SQ[ks]C[But white chooses to actually go for the tiger's mouth connection. White now has a sort of back-up connection at P2, but black gets a move with good value at L1.]
;B[ks]
;W[lr]
;B[hq]
(;W[hp]
;B[hr]
;W[pk]
(;B[pr]
;W[qr]
;B[fh]
(;W[ge]TR[hc]C[This shape point is not trying to save H17 directly, but it is making some use of it. H17 is going to have some good aji later on.]
;B[dh]
(;W[bi]TR[cf]SQ[bk]C[So white tries to be a little bit more efficient by descending here, which sort of makes a connection while also threatening B9 later on for an extra eye here. But this connection is actually not completely secure.]
(;B[fe]
;W[ff]
;B[hd]
;W[fj]
(;B[gi]
;W[kl]
;B[gf]
;W[gg]
;B[hf]
;W[fg]
;B[gj]
;W[bk]
(;B[nc]
(;W[jl]MA[dh]MA[fh]MA[gi]MA[gj]TR[ll]SQ[jo]SQ[hp]SQ[iq]C[This move is making the M8 cut a little less attractive. It's also one step closer to saving the bottom stones, and it might have an effect on making the black group on the left quite weak in the future, which we're going to see. So it doesn't look like much right now, but we're going to see in the progress of this game that this move has a large effect, actually.]
(;B[oj]
;W[ok]
;B[hg]
;W[ie]
(;B[hh]TR[bg]C[Black just calmly extends here, making a strong shape and threatening now for real actually B13.]
(;W[bf]
;B[lk]
(;W[ki]C[So white tries to fight black like this, saying, "If you're going to cut here now, I'm just going to swallow the cutting stones up."]
(;B[jj]
;W[kj]
;B[nk]
;W[he]
;B[ic]
;W[ec]TR[cc]TR[dd]
(;B[kk]C[So black just plays away.]
;W[gd]
;B[fc]
;W[id]
;B[hb]
;W[eb]
;B[ed]
(;W[jk]
;B[ck]
;W[cj]
;B[jc]
;W[jh]
(;B[pj]TR[ok]TR[pk]SQ[nl]C[Black plays this profitable move. Since these white stones are a bit weak, white is induced to play a hane.]
;W[nl]
;B[nj]
;W[ij]
(;B[jf]TR[hc]TR[gd]TR[id]TR[ge]TR[he]TR[ie]C[So instead of going for the cut immediately, black first tries to capture these stones.]
;W[ib]
(;B[hd]C[For now, black just takes the ko once first.]
;W[in]
(;B[im]C[Black protects by playing this hane.]
;W[hc]
;B[ll]
;W[ml]
;B[fb]
;W[ha]
;B[gb]
;W[nh]
(;B[mg]SQ[ic]SQ[jc]SQ[nc]SQ[pd]SQ[jf]MA[jh]MA[nh]MA[ki]MA[kj]TR[kk]TR[lk]TR[ll]C[This move looks perfectly placed to prevent that, so that was my first idea on why black plays there specifically, but I think it more has to do with just solidifying the top while also peeping at this connection, threatening to cut white off here. We're going to see O12 getting cut off and having to handle itself on the right side.]
(;W[kc]C[White just makes one other probing move here, forcing black to just back off.]
;B[jb]
;W[ph]
;B[mh]
;W[mi]
;B[ni]
;W[ng]
(;B[mf]
;W[nf]
;B[qj]
;W[if]
(;B[ne]TR[mf]SQ[nf]TR[mg]SQ[ng]TR[mh]SQ[nh]SQ[ph]C[Black plays away and just makes sure that these stones are safe and tries to kill the right instead.]
;W[ke]
(;B[hn]TR[gf]TR[hf]TR[hg]TR[dh]TR[fh]TR[hh]TR[gi]TR[gj]C[So I think this move has a little bit to do with making sure that this group can still escape.]
;W[jm]
;B[kn]
;W[mk]
(;B[qf]SQ[gf]SQ[hf]SQ[hg]SQ[dh]SQ[fh]SQ[hh]SQ[gi]SQ[gj]TR[kk]TR[lk]TR[ll]C[By black handling this in a different way, allowing these three stones to stay on the board, it's going to be a little bit harder for white to just swallow these stones up without any consequences.]
;W[qk]
(;B[le]TR[me]SQ[ig]SQ[jg]C[This move is protecting black's cut and also preparing to cut white off.]
;W[gk]
(;B[hk]
;W[hl]
;B[fk]
;W[gl]
;B[ej]
;W[ek]
;B[fi]
;W[fl]
;B[jg]
;W[ig]
;B[ih]
(;W[kb]
;B[eh]
;W[kd]
;B[kf]
;W[io]
;B[hm]
;W[go]
;B[eq]
;W[gn]
;B[cr]
;W[cq]
;B[dq]
;W[fj]
;B[hd]
;W[rh]
;B[rk]
;W[rl]
;B[ri]
;W[hc]
;B[ol]
;W[om]
;B[hd]
(;W[rg]TR[pg]C[So S13 is taking the clamp away from black while also setting up some problems in the corner later, but the shape is a bit painful when black gets Q13.]
;B[pg]
;W[oh]
(;B[rf]
(;W[qh]CR[nf]TR[qf]TR[rf]CR[ng]TR[pg]CR[rg]CR[nh]CR[oh]CR[ph]CR[rh]SQ[ni]MA[oi]MA[pi]MA[qi]SQ[ri]SQ[nj]SQ[oj]SQ[pj]SQ[qj]SQ[nk]SQ[rk]C[So white is forced to connect, so black got some very pleasant exchanges in here. For now this is a seki since neither side has an eye and there are some shared liberties. Regardless of the precise number of external liberties, it's quite easy to see that there's going to be a seki in the end.]
(;B[ip]SQ[hm]SQ[im]SQ[hn]MA[in]TR[ho]MA[io]MA[jo]MA[jp]C[This has the added bonus of threatening H5 which would save the three stones by capturing four stones.]
;W[jp]
;B[jq]
;W[gp]
;B[ep]
;W[br]
(;B[dr]C[So black just backs off and still it's not going to be easy for white to set up the ko, it's gonna take some work.]
;W[of]
(;B[lb]TR[ha]TR[eb]TR[fb]TR[gb]TR[hb]TR[ib]TR[jb]TR[kb]TR[cc]TR[dc]TR[ec]TR[fc]TR[gc]TR[ic]TR[jc]TR[kc]TR[nc]TR[cd]TR[dd]TR[ed]TR[fd]TR[gd]TR[hd]TR[id]TR[kd]TR[ce]TR[de]TR[fe]TR[ge]TR[he]TR[ie]TR[ke]TR[le]TR[ne]TR[bf]TR[cf]TR[df]TR[ff]TR[gf]TR[hf]TR[if]TR[jf]TR[kf]TR[mf]MA[nf]MA[of]TR[fg]TR[gg]TR[hg]TR[ig]TR[jg]TR[mg]MA[ng]SQ[pg]MA[rg]TR[dh]TR[eh]TR[fh]TR[hh]TR[ih]TR[mh]MA[nh]MA[oh]MA[ph]MA[qh]MA[rh]TR[bi]TR[ci]TR[fi]TR[gi]MA[ni]MA[ri]TR[cj]TR[dj]TR[ej]TR[fj]TR[gj]MA[nj]MA[oj]MA[pj]MA[qj]TR[ek]TR[gk]TR[hk]MA[nk]MA[rk]TR[fl]TR[gl]TR[hl]C[Black instead decides to just take a liberty in this big capturing race here for now, but this is going to allow white, actually, to capture Q13, which will get white one eye, which will allow white to capture this group. So it's a really big decision here for black to decide that, "I'm gonna try to take the upper hand in this capturing race and give up on that one."]
(;W[rd]C[So white is going to try to get a little bit more by starting here.]
;B[pe]
;W[bn]
;B[do]
;W[pf]
(;B[re]MA[la]MA[ma]MA[na]MA[oa]MA[pa]MA[qa]MA[ra]MA[sa]MA[mb]MA[nb]MA[ob]MA[pb]MA[qb]MA[rb]MA[sb]MA[lc]MA[mc]MA[oc]MA[pc]MA[qc]MA[rc]MA[sc]MA[ld]MA[md]MA[nd]MA[od]MA[qd]SQ[rd]MA[sd]MA[me]MA[oe]MA[qe]MA[se]MA[sf]TR[qg]C[So black just protects here and white gets to cut, but thanks to S16, now the difference is that there is a lot more aji in the corner. White is going to use that aji; first as ko threats for the lower left which is coming up soon, and also for some magic that's going to happen on top at the end of the game which we will see. So it's not like white can live in the corner right now but just barely not, so that's why it's going to have a big impact on ko threats and aji for later.]
;W[qg]
;B[bm]
;W[bp]
;B[fk]
;W[hj]
;B[be]
;W[cp]
;B[an]
;W[ao]
;B[bo]
;W[sd]
;B[qe]
;W[bn]
;B[bg]
;W[cg]
(;B[bo]
;W[qc]
;B[pb]
;W[bn]
(;B[on]
(;W[lj]
(;B[bo]
;W[qb]
;B[ra]
;W[bn]
;B[nm]
;W[ql]
;B[bo]
;W[qa]
;B[rb]
;W[bn]
;B[af]
;W[ch]
;B[bo]
;W[rc]
;B[sb]
;W[bn]
;B[mo]
;W[lo]
;B[bo]
;W[gq]
;B[gr]
(;W[ir]
;B[is]
;W[ip]
;B[kh]
;W[lp]
;B[js]
;W[bn]
;B[am]
;W[ji]
;B[aq]
;W[ar]
;B[bs]
;W[fr]
;B[hs]
;W[fo]
;B[eo]
;W[ah]
;B[ag]
;W[lh]
;B[lc]
;W[kg]
;B[aj]
(;W[fj]C[So at this point, white just takes the ko in the center, allowing black to capture on the left. So now white has zero eyes on the left, but could potentially connect up in the center.]
;B[bl]
(;W[md]C[Instead of doing that, white goes for a much more complicated variation, so it seems like white sees an opportunity to maybe get better than a draw and goes for it, starting here on the top. This is going to start some really crazy exchanges happening.]
(;B[me]C[Black can't allow that so black has to connect here.]
;W[ld]
;B[nd]
;W[ob]
(;B[pc]
;W[mc]
(;B[mb]C[So to keep the liberties low, black needs to play here.]
;W[nb]
;B[je]
;W[ma]
;B[pa]
;W[la]
;B[jd]
;W[oa]
;B[fk]
;W[ln]
;B[fs]
;W[fj]
;B[gm]
;W[fm]
;B[fk]
;W[lg]
;B[lf]
;W[fj]
(;B[em]SQ[dl]SQ[cm]TR[en]C[There is a big difference between E7 and E6, actually. It makes a difference between black being able to win the ko or not. If we look at other ko threats available on the board, those two white ko threats turn out to be deciding the ko.]
(;W[ls]TR[ei]SQ[fn]MA[gn]MA[in]MA[fo]MA[go]MA[io]MA[jo]SQ[fp]MA[gp]MA[hp]MA[ip]MA[jp]MA[gq]MA[iq]MA[ir]C[So white actually has to concede at E11 and allow black to start this other ko at F6. But white is foreseeing that white is gonna lose the F6 ko, so white plays a forcing move at M1 (which would no longer be forcing after the white stones are off the board, of course). Then, white captures at E11 and allows black to start the other ko at F4.]
;B[es]
;W[ei]
;B[fp]
;W[en]
;B[qo]
;W[ro]
;B[fn]
(;W[ak]MA[la]MA[ma]MA[na]MA[oa]MA[kb]MA[lb]MA[mb]MA[nb]MA[ob]MA[kc]MA[lc]MA[mc]MA[kd]MA[ld]MA[md]MA[ke]TR[ai]CR[ei]TR[aj]TR[bj]SQ[gn]SQ[in]SQ[fo]SQ[go]SQ[ho]SQ[io]SQ[jo]SQ[gp]SQ[hp]SQ[ip]SQ[jp]SQ[gq]SQ[iq]SQ[ir]C[At this point already, white just goes back and says, "Okay, I'm happy with just getting this as compensation", allowing black to capture this whole big thing and white just gets two stones. It seems really unfair! Suddenly black gets a really big capture, white gets a really small capture; but that was sort of the compensation black got for white just living inside of black's area. Huge trades back and forth, but it's still completely even after all that! White had an easy option before just going to an easy draw with 254. E11, but went into this really complicated exchange variation and it's still completely even.]
;B[ho]
;W[ai]
;B[il]
;W[ik]
;B[di]
;W[ej]
;B[dl]
;W[ja]
;B[ia]
;W[sg]
;B[ka]
;W[sf]
;B[se]
;W[ja]
;B[gh]
;W[ef]
;B[ka]
;W[cb]
(;B[db]C[Black has to respond.]
;W[ja]
;B[qq]
;W[rq]
;B[ka]
(;W[eg]C[So white is seeing that there's no way actually at this point to win this ko, so it just plays a dame. This was white's last chance. If white had I think two more ko threats, then white could have won this ko and won the game by 2 points, but now as it stands, there're just dame left. ]
;B[ja]
;W[ae]
;B[ad]C[Black 51 % (KataGo)

-- chat --
Maharani: Video review by Anton Christenson, EGF 3d: https://www.youtube.com/watch?v=MFbJ3diGqn8
]
;W[bh]
;B[ae]
;W[al]
;B[dk]
;W[el]
;B[dg]
;W[ee]
;B[oe]
;W[oc]
;B[od]
;W[hi]
;B[ii]C[If you score the game from here, you can see that it's actually a draw at this point.]
)(;W[ae]
;B[ad]
;W[bh]TR[ae]C[White could continue playing for instance with this throw-in and this atari, but it turns out that black has more ko threats.]
;B[ae]
)(;W[bh]
;B[qi]
;W[sj]
;B[si]
;W[sk]
;B[mj]
;W[li]TR[qi]TR[si]TR[mj]C[Black has at least three ko threats just here on the right.]
))(;B[ja]
(;W[db]
;B[bb]
;W[ba]
;B[bc]SQ[bb]TR[cb]SQ[cc]SQ[dc]SQ[cd]SQ[be]SQ[ce]SQ[af]SQ[ag]SQ[bg]C[White C18 is not actually threatening to kill the whole corner. The corner has an eye and white does not have an eye, so this is not working.]
)(;W[ad]TR[af]TR[ag]TR[bg]C[Instead, what white could do is start with this move and of course these three stones are enough at this point in the game, black can't give them up.]
(;B[ae]
;W[db]
;B[bb]
;W[bc]TR[cb]C[We might get something like this, so C18 is a valid ko threat.]
)(;B[bd]
;W[db]
;B[bb]
;W[bh]
;B[ac]
;W[ae]
;B[af]
;W[ag]
;B[ae]
;W[oe]
;B[od]
;W[al]C[KataGo gives black -29 pp for 307. K19]
))))(;W[sf]TR[mj]TR[pp]C[There are some bigger ko threats for white, for instance this one would be bigger, but black has more ko threats anyways, for instance at Q4, N10, and so on.]
;B[se]
;W[en]
;B[sg]
;W[sh]
;B[fn]
;W[ai]
;B[ho]
;W[ak]
;B[di]
;W[ej]
;B[il]
;W[ik]
;B[dl]
;W[ja]
;B[ia]
;W[ka]
;B[ga]
;W[oc]
;B[sf]
;W[eg]
;B[ee]
;W[od]C[KataGo gives white -7 pp for 288. T14]
)(;W[ai]C[KataGo's second choice.]
)(;W[bh]C[KataGo's third choice.]
))(;W[ei]
;B[fp]TR[ej]SQ[gn]SQ[in]SQ[fo]SQ[go]SQ[io]SQ[jo]SQ[gp]SQ[hp]SQ[ip]SQ[jp]SQ[gq]SQ[iq]SQ[ir]C[If white captures at E10, black is threatening to start a new ko down here to capture all these stones.]
;W[en]
;B[qo]
;W[ro]
;B[fn]
;W[ae]
;B[ad]
;W[en]
;B[pp]
;W[qq]
;B[fn]
;W[sf]
;B[se]
;W[en]
;B[sg]
;W[sh]
;B[fn]
;W[hi]
;B[ho]
;W[ja]C[KataGo gives white -13 pp for 280. E11]
)(;W[il]
;B[fk]SQ[el]TR[il]MA[em]C[If white responds at J8, black wants to start this ko and be able to cut at E8. Either white has zero local ko threats or white has two local ko threats, depending on how black starts the ko. When black has played E7 like this, black is going to win the ko or get enough compensation elsewhere to win the game.]
(;W[dk]
;B[el]
(;W[fj]
)(;W[dl]C[Not even this is a ko threat.]
;B[fj]
;W[dm]
;B[en]
;W[ak]
;B[cm]C[This would only be one eye, so it wouldn't really matter.]
))(;W[ls]
;B[es]
;W[fj]
;B[qo]
;W[ro]
;B[fk]
;W[sf]
;B[se]
;W[fj]
;B[fp]
;W[ho]
;B[fk]
;W[dk]
;B[el]
;W[fj]
;B[sh]
;W[sg]
;B[fk]
;W[fr]
;B[er]
;W[fj]
;B[rq]
;W[qq]C[KataGo gives white -24 pp for 280. J8]
))(;W[en]C[KataGo's second choice.]
)(;W[db]C[KataGo's fourth choice.]
)(;W[cb]C[KataGo's fifth choice.]
))(;B[en]C[Wouldn't it be better to just connect?]
(;W[ei]
;B[fp]TR[ej]SQ[gn]SQ[in]SQ[fo]SQ[go]SQ[io]SQ[jo]SQ[gp]SQ[hp]SQ[ip]SQ[jp]SQ[gq]SQ[iq]SQ[ir]C[If white captures, you can simply capture these stones without ko.]
)(;W[il]
;B[fk]
(;W[dk]
;B[el]TR[fk]SQ[dl]SQ[cm]C[If black now starts the ko, then after black cuts here, white has two local ko threats here.]
;W[dl]C[White has this atari.]
;B[em]
;W[cm]C[And then white has this atari.]
)(;W[ls]
;B[es]
;W[fj]
;B[qo]
;W[ro]
;B[fk]
;W[dk]
;B[el]
;W[fj]
;B[rq]
;W[qq]
;B[fk]
;W[dl]
;B[em]
;W[fj]
;B[fp]
;W[ho]
;B[fk]
;W[cm]
;B[ak]
;W[fj]
;B[mj]
;W[li]
;B[fk]
;W[fr]C[KataGo gives black -13 pp for 279. E6]
)))(;B[qo]C[KataGo's second choice.]
))(;B[nb]
;W[mb]MA[kb]TR[lb]MA[kc]TR[lc]MA[mc]MA[gd]MA[id]MA[kd]MA[ld]MA[md]MA[ge]MA[he]MA[ie]MA[ke]SQ[gf]SQ[hf]MA[if]SQ[hg]MA[ig]SQ[dh]SQ[eh]SQ[fh]SQ[hh]SQ[ih]SQ[fi]SQ[gi]SQ[ej]SQ[gj]C[Locally, white would be dead even by capturing these two stones, but the problem is that dead is black on the inside here, so black needs to keep the liberties on the white group low as well. If white can capture two stones, then the white group gets too many liberties.]
;B[na]
;W[la]
;B[ma]
;W[ei]
;B[lb]
;W[hi]
;B[gh]
;W[eg]C[KataGo gives black -25 pp for 261. O18]
))(;B[nb]
;W[pc]TR[nb]C[If black tried to connect at O18, then white's suddenly alive. That's no good.]
;B[fk]
;W[dk]
;B[el]
;W[fj]
;B[oc]
;W[oa]
;B[fk]
;W[em]
;B[dl]
;W[fj]C[KataGo gives black -28 pp for 259. O18]
))(;B[ld]
;W[pc]
(;B[ob]
;W[oe]
;B[od]SQ[pc]TR[ld]SQ[oe]C[If black just blocks at M16 and white pushes at Q17 and P15, black needs to stay connected.]
;W[me]C[White gets to play this one.]
(;B[nd]TR[lf]C[Black can't connect here because then white could thrown it at M14.]
;W[lf]
;B[mc]
;W[lg]TR[md]TR[me]SQ[jf]SQ[kf]SQ[jg]C[If black captures here, suddenly these three stones are dead and it's a catastrophe.]
)(;B[lf]C[Black would need to connect.]
;W[nd]
;B[mc]TR[ne]C[White gets to capture in sente.]
;W[ne]
;B[oc]
;W[ei]TR[md]TR[nd]TR[me]SQ[ne]TR[oe]TR[nf]TR[of]TR[pf]TR[ng]C[This is a big enough gain to make the game completely in white's favour. It might look quite small to just capture one stone like that, but the game was so even that getting a gain like that and coming back at E11, now it's completely winning for white.]
))(;B[fk]
;W[ln]
;B[es]
;W[fj]
;B[qo]
;W[ro]
;B[fk]
;W[me]
;B[lf]
;W[fj]
;B[mj]
;W[li]
;B[fk]
;W[ls]
;B[fs]
;W[fj]
;B[gm]
;W[fm]
;B[fk]
;W[dk]
;B[el]
;W[fj]
;B[ob]
;W[sf]
;B[fk]
;W[en]
;B[em]
;W[fj]
;B[se]
;W[od]
;B[fk]
;W[dl]
;B[dm]
;W[fj]
;B[oe]
;W[nd]C[KataGo gives black -5 pp for 255. M16]
)))(;W[ei]SQ[ma]SQ[na]SQ[oa]SQ[pa]SQ[qa]SQ[ra]SQ[sa]SQ[lb]SQ[mb]SQ[nb]SQ[ob]SQ[pb]SQ[qb]SQ[rb]SQ[sb]SQ[lc]SQ[mc]SQ[nc]SQ[oc]SQ[pc]SQ[qc]SQ[rc]SQ[sc]SQ[md]SQ[nd]SQ[od]SQ[pd]SQ[qd]SQ[rd]SQ[sd]SQ[le]SQ[me]SQ[ne]SQ[oe]SQ[pe]SQ[qe]SQ[re]SQ[mf]SQ[qf]SQ[rf]SQ[mg]SQ[mh]TR[gn]TR[in]TR[fo]TR[go]TR[io]TR[jo]TR[gp]TR[hp]TR[ip]TR[jp]TR[gq]TR[iq]TR[ir]C[You might expect white to just connect here, and I think if white did this, it's going to be a draw. KataGo was very sure about it being 50/50 at this point, it seemed, because there's not much complicated stuff left. It's mainly just mostly small endgame left, so if you play it out, it seems to be a draw. The white group on the bottom will live, the black territory on the top will stay black territory.]
;B[ka]
;W[md]
;B[me]
;W[ln]
;B[es]
;W[hc]
;B[ld]
;W[lg]
;B[jd]
;W[fm]
;B[en]
;W[ls]
;B[fs]
;W[dm]
;B[em]
;W[dl]
;B[oe]
;W[ak]C[KataGo gives white -16 pp for 254. E11 (54 % compared to 70 % for N16)]
)(;W[ls]C[KataGo's second choice.]
))(;W[ak]TR[dk]C[White normally would need to respond here, but then white doesn't have two eyes anymore, so black could just maybe cut at D9.]
;B[dk]TR[gf]TR[hf]TR[hg]TR[dh]TR[eh]TR[fh]TR[hh]TR[ih]TR[fi]TR[gi]TR[ej]TR[gj]C[We have to keep in mind black needs to stay alive with this group, so I'm not sure if black really could connect immediately here.]
;W[fj]TR[dd]TR[de]TR[bf]TR[cf]TR[df]TR[ff]TR[cg]TR[fg]TR[gg]TR[ah]TR[ch]TR[bi]TR[ci]TR[cj]TR[dj]C[But this is really dangerous for white to die with this whole group.]
;B[qo]
;W[ro]
;B[fk]
;W[ae]
;B[ad]
;W[fj]
;B[gm]
;W[fm]
;B[fk]
;W[bh]
;B[ae]
;W[fj]C[KataGo gives white -32 pp for 252. A9]
))(;W[bn]TR[ir]C[At this point, white could take back the ko, but instead decides to just push down at J2.]
;B[ln]
;W[no]
;B[mm]
;W[ll]
;B[ir]
;W[am]
;B[al]
;W[oo]
;B[an]
;W[dg]
;B[bo]
;W[hi]
;B[gh]
;W[bn]
;B[lp]
;W[mo]
;B[bo]
;W[pc]
;B[ob]
;W[bn]
;B[aq]
;W[ar]
;B[bo]
;W[oc]
;B[nd]
;W[bn]
;B[pp]
;W[qq]
;B[bo]
;W[hc]C[KataGo gives white -1 pp for 230. B6]
))(;B[nm]
;W[ql]TR[om]C[It's no real threat for black to just take this stone. White could just connect.]
;B[bo]
;W[qb]
;B[ra]
;W[bn]
;B[mo]
;W[lo]
;B[bo]
;W[ir]
;B[is]
;W[ip]
;B[af]
;W[ch]
;B[ap]
;W[gq]
;B[gr]
;W[ln]
;B[js]
;W[fj]
;B[je]
;W[jd]
;B[kh]
;W[ji]
;B[lh]
;W[ja]
;B[hc]C[KataGo gives black -4 pp for 209. O7]
))(;W[am]
;B[nm]
(;W[ql]
;B[mj]C[If white finishes the ko, it's not capturing one stone in itself that's important, but the fact that this move becomes a double-atari.]
(;W[li]
)(;W[lj]
;B[li]SQ[nf]SQ[of]SQ[pf]SQ[ng]SQ[qg]SQ[rg]SQ[nh]SQ[oh]SQ[ph]SQ[qh]SQ[rh]TR[ni]TR[ri]TR[mj]TR[nj]TR[oj]TR[pj]TR[qj]TR[nk]TR[rk]C[If black saves these stones, then this white group is suddenly dead.]
))(;W[sk]
;B[mm]
;W[lj]
;B[ln]
;W[no]
;B[ll]
;W[oo]C[KataGo gives white -58 pp for 208. A7]
)))(;B[af]C[Black is going to use this as a ko threat to remove the eyes in a moment.]
;W[ch]
;B[bo]
;W[qb]
;B[sb]
;W[bn]
;B[am]
;W[aq]
;B[dk]
;W[fj]
;B[nm]
;W[ql]C[KataGo gives black -21 pp for 207. A14]
)(;B[nm]C[KataGo's second choice.]
)(;B[mo]C[KataGo's third choice.]
))(;B[ch]
;W[bh]C[It's not like black can cut here.]
))(;B[qg]
;W[qe]TR[pg]C[Black can't save the one stone, white would cut.]
;B[qd]
;W[re]
;B[rc]
;W[sf]
;B[bl]
;W[aj]
;B[be]
;W[bp]C[KataGo gives black -34 pp for 187. R13]
))(;W[pf]TR[pg]C[White could capture Q13 directly with a move like Q14. If white plays it now, black wouldn't connect.]
(;B[qg]
;W[qe]
;B[re]
;W[qd]
;B[qc]
;W[rd]
;B[rc]C[This would be not very good for black.]
;W[pe]
;B[sd]C[Black can actually connect up here, but white can atari here and black can't actually save Q16.]
;W[pc]
(;B[od]
;W[pb]
;B[qb]
;W[se]
;B[sf]
;W[sg]
;B[sc]
;W[og]
;B[se]
;W[sb]C[We might get something like this where white wins the capturing race.]
)(;B[pb]C[So black would be forced to atari under. Even though maybe white will end up with no eye in the end so it will still be a seki here, it's not worth it for black because black loses so much in the corner.]
))(;B[qd]TR[pg]C[So black is just going to back off, play some move in the corner, allow white to take Q13 in gote.]
(;W[qg]SQ[lb]SQ[nc]SQ[pd]SQ[qd]SQ[le]SQ[ne]SQ[jf]SQ[kf]SQ[mf]SQ[qf]SQ[rf]SQ[jg]SQ[mg]TR[pg]SQ[mh]TR[ni]TR[ri]TR[nj]TR[oj]TR[pj]TR[qj]TR[nk]TR[rk]C[White captures all these stones in gote, but black can play some other big point and now has a very solid corner.]
)(;W[bp]
;B[do]
;W[qg]
;B[be]
;W[dg]
;B[fk]
;W[hj]
;B[bl]
;W[bn]
;B[cp]
;W[fj]C[KataGo gives white -9 pp for 182. Q14]
)))(;W[bp]C[KataGo's second choice.]
)(;W[bn]C[KataGo's third choice.]
)(;W[qc]C[KataGo's fourth choice.]
))(;B[pf]TR[mb]TR[nb]TR[oc]TR[od]TR[oe]C[Black could probably respond here, take a liberty, but it's gonna allow white some extra forcing move here, some extra aji on the top.]
;W[nb]
;B[mb]
;W[ob]
;B[mc]
;W[qc]
;B[pc]
;W[oe]
;B[qd]
;W[dg]
;B[bn]
;W[hc]
;B[ch]
;W[bh]
;B[hd]
;W[mj]
;B[ka]
;W[hc]
;B[lb]
;W[od]
;B[oc]
;W[ac]
;B[fk]
;W[hj]
;B[el]
;W[fj]
;B[gm]
;W[fm]
;B[fk]C[KataGo gives black -0.5 pp for 181. Q14]
)(;B[fk]C[KataGo's second choice.]
)(;B[bl]C[KataGo's third choice.]
))(;B[bq]
;W[bp]C[Black doesn't want to atari here immediately. This is quite a pleasant way for white to play the ko.]
;B[cp]
;W[nb]
;B[mb]
;W[cq]
;B[fk]
;W[aq]
;B[el]
;W[fj]
;B[il]
;W[ik]C[KataGo gives black -14 pp for 179. B3]
))(;B[of]
(;W[jq]TR[km]TR[jn]TR[kn]TR[ko]TR[kp]TR[kq]C[There's this problem where white can just swallow up all these stones. It's quite big for black to protect that.]
)(;W[gp]
;B[bq]
;W[ir]
;B[is]
;W[jq]
;B[gq]
;W[mj]
;B[sf]
;W[hc]
;B[ia]
;W[dg]
;B[ch]
;W[bh]C[KataGo gives black -19 pp for 173. P14]
))(;B[jq]C[But rather than protect directly like this, black throws in first and connects.]
;W[br]
;B[dr]
;W[bn]
;B[ep]
;W[of]
;B[bm]
;W[bp]
;B[do]
;W[cp]
;B[an]
;W[ao]
;B[bo]
;W[hc]
;B[lb]C[KataGo gives black -13 pp for 173. K3]
))(;W[hc]
(;B[qh]C[If white plays elsewhere now, this threatens to connect underneath.]
;W[qg]
;B[sg]
;W[qi]
;B[sh]
)(;B[mj]
;W[li]
;B[qh]
;W[qg]
;B[sg]
;W[ja]
;B[ia]
;W[qi]C[KataGo gives white -13 pp for 172. H17]
)))(;B[qh]
;W[qg]
(;B[qi]
;W[pf]C[Black can't cut right now. This is good for white.]
)(;B[rf]
;W[qi]
;B[of]
;W[oe]
;B[od]
;W[mb]
;B[je]
;W[jd]
;B[hc]
;W[kg]
;B[lf]
;W[lb]
;B[mc]
;W[dg]
;B[ch]
;W[bh]
;B[nb]
;W[si]
;B[rj]
;W[sh]C[KataGo gives black -4 pp for 171. R12]
))(;B[ip]C[KataGo's second choice.]
))(;W[lj]
;B[rg]C[If white were to play elsewhere, black has this clamp to connect up very cleanly.]
))(;W[kg]
;B[kf]TR[le]C[Thanks to M15, this move is no longer working. Black is connected.]
))(;B[mj]
;W[lj]
;B[hk]
;W[fk]C[Maybe this would make it a lot simpler for white to just connect solidly here.]
))(;B[jg]
;W[ig]
;B[ih]
;W[kg]TR[le]TR[jf]TR[jg]C[Black can't cut because these stones are dead, but if black had a stone at M15, then suddenly black could actually come out with the cutting stones here.]
))(;B[mj]TR[jk]TR[jl]TR[kl]TR[jm]C[Why shouldn't black just atari here and ask white, "Do you want to save the cutting stone here and allow me to save my cutting stones, or do you want to capture the three stones and allow me to capture here, saving my group?"? I think it's possibly because the latter removes the slight shortage of liberties on white's four stones.]
(;W[li]
;B[lj]
)(;W[lj]
(;B[li]SQ[gf]SQ[hf]SQ[hg]SQ[dh]SQ[fh]SQ[hh]SQ[gi]SQ[gj]TR[gk]C[This would make it just super clean for white to kill this black group.]
;W[gk]TR[gf]TR[hf]TR[hg]TR[dh]TR[fh]TR[hh]TR[gi]TR[gj]
)(;B[le]
;W[ri]
;B[qf]
;W[qg]
;B[rg]
;W[rh]C[KataGo gives black -15 pp for 131. N10]
)))(;B[il]C[Right now, a move around here is atari for black.]
))(;B[ig]
;W[kf]C[Black can't cut like this. White is connected back.]
;B[hm]
;W[mk]
;B[mj]
;W[lj]
;B[jg]
;W[kg]C[KataGo gives black -26 pp for 127. J13]
)(;B[jg]
;W[ig]
;B[ih]
;W[kg]TR[jf]TR[jg]C[The cutting stones are dead.]
))(;B[ig]TR[hc]TR[gd]TR[id]TR[ge]TR[he]TR[ie]TR[if]C[If black tried to just keep these stones dead, white obviously can't save this group.]
(;W[jg]
;B[je]TR[hc]TR[gd]TR[id]TR[ge]TR[he]TR[ie]TR[if]C[This is just completely dead.]
)(;W[kf]
;B[jg]
;W[kg]
;B[ke]
;W[me]
;B[le]
;W[lf]TR[hc]TR[gd]TR[id]TR[ge]TR[he]TR[ie]TR[if]SQ[mf]SQ[mg]SQ[mh]C[What white CAN do is by forcing black to swallow this group up, we can get something like this where white suddenly captures these three stones.]
)(;W[me]
;B[kg]
;W[ke]
;B[jg]
;W[nd]
;B[lj]
;W[jm]
;B[kn]
;W[hm]
;B[il]
;W[ik]
;B[hl]
;W[hk]
;B[gl]
;W[gk]
;B[li]
;W[oc]
;B[od]
;W[mc]C[KataGo gives black -7 pp for 125. J13]
))(;B[me]C[KataGo's second choice.]
))(;B[li]
;W[mj]
(;B[mk]
;W[lj]TR[mi]C[There's no way for black to simply capture this one stone, it's not working.]
)(;B[lj]
;W[mk]
;B[lh]
;W[if]
;B[ig]
;W[jg]
;B[kf]
;W[gk]
;B[hn]
;W[jd]
;B[kd]C[KataGo gives black -15 pp for 121. M11]
)))(;W[mk]
(;B[lj]
;W[mj]
;B[li]
;W[lh]
;B[mi]
(;W[ni]
;B[mh]
)(;W[mh]
;B[ni]
;W[ph]TR[li]TR[mi]TR[lj]TR[kk]TR[lk]TR[ll]C[But black doesn't want to save these stones anyway because this is too good for white.]
))(;B[ng]
;W[og]
;B[mh]
;W[mi]
;B[oh]
;W[ni]
;B[pg]
;W[of]
;B[pf]
;W[oe]
;B[pe]
;W[lf]
;B[kd]
;W[ph]C[KataGo gives white -4 pp for 114. N9]
))(;W[ph]C[KataGo's second choice.]
))(;B[qd]
;W[mk]
;B[lj]
;W[mj]
;B[li]
;W[lh]
;B[mi]
;W[ni]TR[li]TR[mi]TR[lj]TR[kk]TR[lk]TR[ll]C[If black plays elsewhere, white has this sequence to capture these stones.]
))(;B[hc]TR[ip]C[If black just finishes the ko, it will be very big for white to just connect at J4.]
;W[ip]MA[ck]MA[cl]TR[km]MA[cn]MA[dn]MA[fn]TR[jn]TR[ko]TR[kp]MA[fq]MA[hq]SQ[jq]TR[kq]MA[hr]TR[jr]TR[ks]C[This whole black group has a cutting point at K3 and black needs to stay connected on the other side, so this would be good for white.]
;B[gp]
;W[ep]C[KataGo gives black -26 pp for 105. H17]
))(;B[fb]C[Black could just connect in this way and there's not very much white can do.]
(;W[ha]
;B[gb]
)(;W[ke]
;B[kf]
;W[ha]
;B[hd]
;W[nh]
;B[mg]
;W[hc]
;B[gb]
;W[kc]
;B[jb]
;W[me]
;B[ng]
;W[oe]
;B[lf]
;W[pe]
;B[qd]
;W[oh]C[KataGo gives black -2.5 pp for 103. F18]
))(;B[jd]C[Black could also just turn like this on the outside.]
(;W[gb]
;B[fb]
;W[ha]
;B[db]
;W[je]
;B[ke]
;W[kf]
;B[if]C[Even though white can capture one stone, it's not a very big deal because obviously, now these cuts here are working. White is short on liberties.]
)(;W[in]
;B[ip]
;W[jp]
;B[jq]
;W[io]
;B[gp]
;W[ll]
;B[fb]
;W[ep]
;B[go]C[KataGo gives black -7.5 pp for 103. K16]
))(;B[lf]C[KataGo's third choice.]
)(;B[qk]C[KataGo's fourth choice.]
)(;B[im]C[KataGo's fifth choice.]
)(;B[cq]C[KataGo's sixth choice.]
)(;B[ke]C[KataGo's seventh choice.]
)(;B[gb]C[KataGo's eighth choice.]
))(;B[ll]C[At this point, it would be quite tempting for black to cut here and maybe attack this whole thing, but this would not actually be a great idea.]
;W[jf]TR[gf]TR[hf]TR[hg]TR[dh]TR[fh]TR[hh]TR[gi]TR[gj]C[White can just connect here, and now this black group is even a little bit weak and it will have to run here.]
(;B[gl]TR[hc]TR[gd]TR[id]TR[ge]TR[he]TR[ie]TR[jf]TR[jh]TR[ki]TR[ij]TR[kj]TR[jk]TR[jl]TR[kl]C[White has enough space with this group to handle it quite confidently. KataGo is giving white an edge in this situation.]
)(;B[gk]
;W[ml]
;B[mk]
;W[in]
;B[im]
;W[hl]C[KataGo gives black -22 pp for 101. M8]
)))(;B[ij]
;W[mj]TR[ij]TR[jj]SQ[kk]SQ[lk]SQ[nk]C[If black saves K10, white can quite severely attack this side.]
;B[ll]TR[jk]TR[jl]TR[kl]C[Black could probably capture these three stones.]
;W[nl]
(;B[il]
;W[mk]
;B[ik]SQ[jh]SQ[ki]SQ[kj]SQ[mj]TR[jk]SQ[mk]SQ[ok]SQ[pk]TR[jl]TR[kl]SQ[nl]SQ[lm]C[Something like this might happen. Even though black captured three stones, white is able to connect back up, and becoming strong in this area that was black's influence is quite bad for black.]
)(;B[mo]
;W[lo]
;B[il]
;W[mk]
;B[bl]
;W[be]
;B[cq]
;W[dq]
;B[bp]
;W[cr]
;B[bo]
;W[bq]
;B[cp]
;W[aq]
;B[fr]
;W[bs]C[KataGo gives black -5.5 pp for 97. J10]
))(;B[nj]C[Black doesn't play a slow move to connect.]
;W[ll]
;B[jg]
;W[kg]
;B[jf]
;W[ib]
;B[fb]
;W[ha]
;B[gb]
;W[kc]
;B[jb]
;W[pe]C[KataGo gives black -5 pp for 97. O10]
)(;B[jf]C[KataGo's second choice.]
)(;B[mi]C[KataGo's third choice.]
)(;B[cq]C[KataGo's fourth choice.]
)(;B[ji]C[KataGo's fifth choice.]
)(;B[bl]C[KataGo's sixth choice.]
)(;B[pp]C[KataGo's eighth choice.]
))(;W[ib]C[Even though white played first, the most white can do is still to start this ko, which perhaps would be the most severe, but starting this ko right now wouldn't really do much.]
;B[hd]
;W[jk]C[White would just cut here probably.]
;B[hc]C[Black can connect.]
;W[ll]
;B[kg]
;W[jc]
;B[jd]
;W[je]
;B[kd]
;W[ke]
;B[mg]
;W[jb]
;B[kc]
;W[kb]
;B[lb]
;W[fb]
;B[ka]
;W[bb]C[KataGo gives white -10 pp for 92. J18]
))(;B[eb]C[If black plays this one, white can atari.]
;W[gd]
(;B[hb]TR[fd]TR[fe]C[If black captures here, white captures the two stones.]
;W[fc]C[This is terrible. Now white's stones are 100 % alive inside black's area of influence.]
)(;B[fc]C[So black has to connect here.]
;W[id]
;B[jc]SQ[hb]TR[hd]C[White can capture one stone and funnily enough, KataGo does not want to actually connect underneath here but prefers to just extend. This would be a bit counter-intuitive to me at first, but it makes sense when you see it because extending there as white is pure points at this point. K17 keeps black's shape strong and prevents white from having any eyes.]
(;W[hb]C[It's not making any eyes for white and black is also quite strong already on both sides.]
)(;W[jg]TR[hb]C[White could connect back like this and it would be still quite even, but it's a little bit pleasant for white to be able to connect back so easily and still have the potential for H18 later on.]
;B[ke]
;W[kd]
;B[le]
;W[jd]
;B[ld]
;W[kc]
;B[hb]
;W[jf]
;B[kk]
;W[jk]
;B[ji]
;W[jh]
;B[hk]C[KataGo gives black -6.5 pp for 85. E18]
)))(;B[fc]
(;W[eb]C[White can start by descending.]
;B[ed]
;W[hb]
(;B[ib]C[Black needs to be careful. If you, for instance, play this, it's a bit scary. You have to consider, is this ladder actually working for black?]
;W[gd]
;B[id]
;W[gb]
;B[je]
;W[if]
;B[jf]
;W[ig]
;B[jg]
;W[ih]
;B[jh]
;W[ii]C[No, I don't think so, so black is in big trouble.]
)(;B[id]
;W[je]
(;B[kd]
;W[gb]
;B[gd]
;W[fb]
;B[ib]
;W[db]
;B[cb]
;W[be]
;B[bd]
;W[ba]C[The capturing race in this corner is actually going to be good for white, so there's some really annoying aji for black.]
)(;B[ib]C[It's pleasant for white to force black to play a second-line move like this.]
(;W[kg]C[White can connect back like this.]
)(;W[mi]C[Or even more efficiently, white can put some pressure down here and sort of indirectly connect back. This would be close to even but slightly good for white, I think.]
))))(;W[hb]
;B[id]
;W[eb]
;B[ed]
;W[je]
;B[ib]
;W[kg]
;B[jh]
;W[ji]
;B[pj]
;W[jg]
;B[qk]
;W[in]
;B[gl]C[KataGo gives black -8 pp for 85. F17]
))(;B[pj]C[KataGo's second choice.]
)(;B[ll]C[KataGo's third choice.]
))(;B[ll]
;W[mj]C[No use to do that for black.]
;B[bl]
;W[ck]
;B[kg]
;W[he]
;B[ic]
;W[mg]
;B[lh]
;W[lj]
;B[mh]
;W[og]
;B[qg]
;W[ph]
;B[qh]C[KataGo gives black -8 pp for 79. M8]
))(;W[ll]C[If white were to just respond here, it would be a bit too submissive.]
;B[pj]
;W[he]
;B[ic]
;W[ec]
;B[nk]
;W[gd]
;B[fc]
;W[hb]
;B[id]
;W[je]
;B[ib]
;W[eb]
;B[kh]
;W[kc]
;B[ld]
;W[le]
;B[kd]
;W[jd]
;B[lc]
;W[jc]
;B[gb]
;W[ed]C[KataGo gives white -1.5 pp for 78. M8]
)(;W[ec]C[KataGo's second choice.]
)(;W[jm]C[KataGo's third choice.]
)(;W[he]C[KataGo's fourth choice.]
)(;W[kj]C[KataGo's fifth choice.]
))(;W[md]C[What would happen if white plays away now? ]
;B[bg]
;W[bf]
;B[cg]
;W[dg]
;B[ch]
(;W[fi]
;B[eh]
;W[gh]
;B[af]
;W[be]
;B[bd]
;W[ae]
;B[ag]
;W[di]
;B[eg]
;W[ef]
;B[ad]
;W[bh]
;B[ed]TR[bg]C[When black plays at B13 now, it's complicated, a lot of reading, but it's going to end up in a capturing race which black is actually winning by one move. We might have something like this.]
)(;W[ag]
;B[eh]
;W[ah]
;B[ck]
;W[cj]
;B[bl]C[KataGo gives white -33 pp for 76. N16]
)))(;B[he]C[It would be very tempting to just respond like this.]
;W[md]
;B[mj]
;W[mc]
;B[nk]
;W[pj]
;B[oi]
;W[ip]
;B[jq]
;W[in]
;B[ep]
;W[eq]
;B[fp]C[KataGo gives black -2 pp for 75. H15]
))(;B[hg]TR[oj]C[In the game, it looks really nice for black to have gotten P10 in as just a small help to make this moyo a bit more threatening.]
;W[ie]
;B[he]
;W[mh]
;B[pg]
;W[md]
;B[oj]
;W[ok]
;B[mc]
;W[qi]
;B[pi]
;W[pj]
;B[mf]
;W[gh]
;B[hh]C[KataGo gives black -4 pp for 71. H13]
)(;B[fk]C[KataGo's second choice.]
)(;B[ip]C[KataGo's third choice.]
)(;B[lk]C[KataGo's fourth choice.]
)(;B[ih]C[KataGo's fifth choice.]
))(;W[qf]
(;B[ll]C[If white played elsewhere, it seems like black is a little bit interested in this cut. There's a little bit of aji going on here.]
)(;B[oj]
;W[ie]
;B[he]
;W[ok]
;B[mj]
;W[lk]
;B[pj]
;W[ng]
;B[qk]
;W[ql]
;B[ki]
;W[nk]
;B[nf]
;W[of]C[KataGo gives white -1.5 pp for 70. R14]
))(;W[ie]C[KataGo's second choice.]
)(;W[li]C[KataGo's third choice.]
))(;B[bg]C[What if black tries to go for the cut now? It's a bit complicated, but it's actually not a good idea for black.]
;W[bf]
(;B[cg]
;W[dg]
;B[ch]
;W[fi]
;B[ei]
(;W[ej]
;B[gh]
)(;W[gh]
;B[ej]
;W[fk]
;B[ek]
;W[eh]
;B[di]
;W[el]
;B[dk]
;W[bn]
;B[bm]
;W[jl]
;B[cq]SQ[dd]SQ[de]SQ[bf]SQ[cf]SQ[df]SQ[ff]SQ[dg]SQ[fg]SQ[gg]SQ[eh]SQ[gh]TR[bi]TR[ci]SQ[fi]TR[dj]SQ[fj]TR[bk]SQ[fk]MA[bn]C[In the end, black managed to capture the stones on the side, but in return, white has gotten a really strong group in the center. What was previously a weak group is now strong influence. White also got B6 in as a forcing move threatening to connect back, and it's also quite big because it helps to make the corner even more safe from something like C3. At this point, it's like 90 % for white according to KataGo even though black managed to capture the left.]
))(;B[ll]
;W[lk]
;B[ml]
;W[mk]
;B[nl]
;W[kk]
;B[mo]
;W[no]
;B[lo]
;W[jm]
;B[kn]
;W[oo]C[KataGo gives black -7 pp for 69. B13]
)))(;B[bg]
;W[bf]
(;B[cg]C[If black tries to cut at this time, these stones are a little bit too weak for it to be realistic.]
;W[gh]
)(;B[gi]
;W[hf]
;B[ic]
;W[cg]
;B[cj]
;W[di]
;B[gj]
;W[lk]
;B[jf]
;W[ec]C[KataGo gives black -7.5 pp for 61. B13]
)))(;B[bg]
(;W[ch]C[If black goes here now, technically white could connect with this really ugly empty triangle, but it's super painful.]
(;B[cg]SQ[bg]TR[dh]C[White would have miai to capture the outside stone or B13.]
;W[dg]
)(;B[bf]C[But black is just going to connect back here.]
;W[cg]C[White has no eyes and black got a bigger corner for free.]
))(;W[bf]C[So white would instead play this one.]
;B[cg]C[Black could cut now if they wanted to, but it just comes down to not being a good idea at the moment. This black group is not super strong and white's follow-up on the upper side is too good, but this cutting idea is just going to stay there and hang around for a while.]
;W[fe]
)))(;W[ch]C[White could just block like this, but this would not leave much eye-shape along the side, so it would be quite painful to be forced to connect in this way.]
;B[fe]
;W[ff]
;B[ef]
;W[eg]
;B[gf]
;W[fg]
;B[gg]
;W[eh]
;B[ei]
;W[dg]
;B[he]
;W[eq]
;B[fi]
;W[fp]
;B[di]
;W[cj]
;B[bk]C[KataGo gives white -2.5 pp for 56. C12]
))(;W[hd]C[It would not be good to just maybe extend here.]
;B[ff]C[This would be really bad for white.]
)(;W[ff]TR[hd]C[If white just jumps out, black gets a very nice shape point at H16.]
;B[hd]C[This tiger's mouth is really strong.]
;W[kl]
;B[fj]
;W[jl]
;B[mk]
;W[li]
;B[ll]
;W[kj]
;B[mi]
;W[mh]C[KataGo gives white -3.5 pp for 54. F14]
))(;B[cq]
(;W[dq]C[When black comes into the corner potentially in the future, one way of handling that would be to protect like this.]
;B[bo]
;W[bp]
;B[cp]
;W[bq]
)(;W[bp]C[But maybe in some future situation, white would like to block from this side.]
(;B[dq]
;W[eq]
;B[ep]
;W[fp]
;B[eo]
;W[gq]TR[hp]C[And then we could get something like this where H4 is quite perfectly placed.]
)(;B[ok]
;W[oj]
;B[nk]
;W[pl]
;B[pr]
;W[qr]
;B[nm]
;W[nn]
;B[ll]
;W[om]
;B[ei]
;W[bi]
;B[ff]C[KataGo gives black -2 pp for 51. C3]
))))(;W[jq]C[After H3, it would no longer work for white to cut.]
;B[ir]
)(;W[ir]SQ[mr]TR[ks]C[Without black L1 (resulting from white N2), white could play this clamp and connect underneath, but now it's not working.]
;B[jq]
;W[lk]
;B[pk]
;W[pi]
;B[nj]
;W[om]C[KataGo gives white -8 pp for 48. J2]
))(;W[lr]C[White could just connect here and then black would connect. This would be a good exchange for white.]
;B[jq]
;W[ok]
;B[nm]
;W[nn]
;B[nk]
;W[nj]
;B[mk]
;W[on]
;B[cq]
;W[cp]
;B[br]
;W[eq]
;B[bp]
;W[bo]
;B[aq]
;W[ao]
;B[ap]
;W[fp]
;B[gq]
;W[gp]
;B[hq]
;W[hp]C[KataGo gives white -0.5 pp for 44. M2]
))(;B[pn]C[KataGo's second choice. Black 49 % winrate (-0.5 pp).]
;W[pl]
;B[ol]
;W[mn]
;B[po]
;W[pk]
;B[ok]
;W[pj]
;B[jn]
;W[km]
;B[kn]
;W[nm]
;B[om]
;W[lm]
;B[qo]
;W[ro]
;B[oj]
;W[pi]
;B[jr]
;W[mr]
;B[jq]
;W[fr]
))(;W[pn]C[KataGo's fifth choice. White 48 % winrate (-2.5 pp) at 9,193 playouts (out of 306,393).]
;B[on]
;W[om]
;B[nn]
;W[ol]
;B[lm]
;W[kq]
;B[jn]
;W[jp]
;B[in]
;W[nk]
;B[nm]
;W[fr]
;B[qj]
;W[pi]
;B[qi]
;W[pg]
;B[oj]
;W[pl]
;B[rl]
;W[rm]
))(;W[ec]C[Later on, this weakness could come into play. Right now it doesn't look like much, but it's going to become something later.]
;B[ed]
;W[ge]
;B[fe]
;W[mn]
;B[gf]
;W[kn]
;B[jn]C[KataGo gives white -10 pp for 34. E17]
))(;B[ec]TR[cc]C[If black instead chooses this to prevent white E17, the C17 cut is a little bit annoying.]
(;W[cc]
;B[bc]
;W[cb]
;B[bb]
;W[bf]C[Even though black can capture it, that means white gets this descent for free, which is actually a really big deal for the safety of this group. The descent makes this connection and the whole group a lot stronger.]
;B[bd]
)(;W[qf]
;B[fr]
;W[lq]
;B[pn]
;W[pm]
;B[on]
;W[kn]
;B[pp]
;W[qr]
;B[qm]
;W[rn]
;B[pr]
;W[qq]
;B[pl]
;W[ln]
;B[kq]
;W[lr]
;B[kr]
;W[jr]
;B[cq]C[KataGo gives black -0.3 pp for 33. E17]
)))(;W[mn]
(;B[cq]
;W[dq]C[If black comes in right now, one simple way of handling this would be just to block on this side.]
;B[bo]
;W[bp]
;B[cp]
;W[bq]
;B[do]
;W[cr]C[There is a common tesuji like this, to allow black to capture one stone but still connect back this way and live in the corner.]
)(;B[pm]
;W[dd]
;B[cc]
;W[lq]
;B[pn]
;W[qm]
;B[pl]
;W[kn]
;B[jn]
;W[in]
;B[jm]
;W[km]
;B[io]
;W[jp]
;B[im]
;W[hn]
;B[hm]
;W[ho]
;B[kq]
;W[kk]
;B[kr]
;W[lr]
;B[ir]C[KataGo gives white -1.5 pp for 32. N6]
)))(;W[mp]
(;B[dh]TR[bj]SQ[mp]C[Even though B10 can look a little bit slow (I think when I saw it the first time, it sort of took me by surprise - just a slide on the second line), this follow-up would actually be quite severe against the white group. Of course, judging which one is more severe between N4 and D12 is really hard.]
)(;B[jq]
;W[ir]
;B[mq]
;W[qc]
;B[qd]
;W[pc]
;B[nc]C[KataGo gives white -5.5 pp for 26. N4]
)))(;B[ck]C[KataGo's eighth choice. Black 48 % winrate (-1.5 pp) at 2,336 playouts (out of 536,415).]
;W[cj]
;B[dk]
;W[ek]
;B[bp]
;W[dn]
;B[cm]
;W[el]
;B[dm]
;W[em]
;B[do]
))(;B[fo]C[If black plays elsewhere, white's aim is the E17 attachment.]
;W[ec]
(;B[ed]C[Block can't just block like this.]
;W[dd]
;B[cc]
;W[fc]C[White will very simply connect up in this way.]
)(;B[fc]C[Black can try to be more fancy with this clamp, but white could force once at D16.]
;W[dd]
;B[db]
;W[cc]TR[cd]TR[ce]C[Maybe cut here now to ask whether black wants to give up these two stones.]
;B[bc]
;W[eb]C[If black wants to save the two stones, this becomes forcing.]
;B[cb]
;W[fb]C[White connects up.]
)(;B[eb]C[At this point, black is forced to be quite submissive here, just crawl like this.]
(;W[dd]
;B[cb]
;W[fc]TR[fd]C[We can get some result like this where white cuts off the stone on the outside.]
;B[fb]C[Maybe later on, black makes this exchange.]
;W[gc]C[Black keeps the corner, but it's very nice for white to get the outside like this.]
)(;W[fc]C[KataGo gives black -6.5 pp for 21. F5]
)))(;B[gb]C[Black could also play a footsweep of their own. KataGo's fifth choice.]
;W[iq]
;B[cl]
;W[ck]
;B[dl]
;W[co]
;B[ci]
;W[di]
;B[bk]
;W[ch]
;B[cj]
;W[qc]
;B[qd]
;W[pc]
;B[nc]
;W[oc]
;B[od]
;W[nb]C[KataGo gives black -1 pp for 21. G18]
)(;B[po]C[KataGo's second choice.]
)(;B[eo]C[KataGo's third choice.]
)(;B[bp]C[KataGo's fourth choice.]
))(;W[bp]C[KataGo's 13th choice. White 48 % winrate (-3 pp) at 70 playouts (out of 868,822).

-- chat --
bugcat: hi o/
]
;B[bh]
;W[be]
;B[dh]
;W[bd]
;B[bc]
;W[ec]
)(;W[dn]C[KataGo's 33rd choice. White 40.5 % winrate (-10.5 pp) at 22 playouts (out of 868,822).]
;B[dm]
;W[en]
;B[cp]
;W[cm]
;B[co]
;W[bm]
;B[do]
))(;W[dn]C[Responding directly would be more common here.

KataGo's third choice. White 51 % winrate (-0.5 pp) at 496,770 playouts (out of 1,428,831).]
;B[eo]
;W[eq]
(;B[po]
;W[qo]
;B[do]
;W[co]
;B[fp]
;W[en]
;B[fn]
;W[fm]
;B[gn]
;W[cm]
;B[nc]
;W[qf]
;B[qe]
;W[pf]
;B[qh]
;W[rf]C[

-- chat --
bugcat: wow, interesting sagari. From move 0: Q16 D4 D17 R4 P3 Q3 P4 R6 L4 D15 C15 C14 C16 D14 F16 D10 F3 D6 E5 E3 Q5 R5 D5 C5 F4 E6 F6 F7 G6 C7 O17 R14 R15 Q14 R12 S14 
]
;B[oh]
;W[ng]
;B[ld]
;W[nh]
;B[oj]
;W[oi]
)(;B[do]
;W[co]
;B[fp]
;W[en]
;B[po]
;W[qo]
;B[fn]
;W[fm]
;B[gn]
;W[cm]
;B[nc]
;W[qf]
;B[qe]
;W[pf]
;B[qh]
;W[oh]
;B[pj]
;W[oj]
;B[ok]
;W[nj]
;B[og]
;W[ph]
;B[pg]
))(;W[cn]C[KataGo's sixth choice. White 50.5 % winrate (-1 pp) at 105,186 playouts (out of 1,428,831).]
(;B[po]
;W[qo]
;B[fo]
;W[iq]
;B[dm]
;W[dn]
;B[fm]
;W[eq]
;B[fr]
;W[io]
;B[ej]
;W[dk]
;B[ek]
)(;B[fo]
;W[hc]
;B[gc]
;W[qc]
;B[qd]
;W[pc]
;B[nc]
;W[oc]
;B[od]
;W[nb]
;B[rc]
;W[gb]
;B[fb]
;W[rb]
;B[ob]
;W[nd]
;B[mc]
;W[pb]
;B[mb]
;W[ne]
;B[le]
;W[ng]
;B[ph]
;W[oa]
))(;W[qf]C[KataGo's second choice. White 51 % winrate (-0.5 pp) at 121,868 playouts (out of 1,428,831).]
;B[qe]
;W[pf]
;B[nd]
;W[lc]
;B[ic]
;W[ob]
;B[qc]
;W[fp]
;B[gp]
;W[fo]
;B[er]
;W[cq]
;B[dq]
;W[cr]
;B[go]
;W[gn]
;B[hn]
;W[gq]
)(;W[nc]C[KataGo's fourth choice. White 51 % winrate (-0.5 pp) at 17,601 playouts (out of 1,428,831).]
;B[cn]
;W[bo]
;B[dk]
;W[cj]
;B[ek]
;W[ej]
;B[eo]
;W[er]
;B[fr]
;W[fk]
)(;W[fp]C[KataGo's fifth choice. White 51 % winrate (-0.5 pp) at 116,140 playouts (out of 1,428,831).]
;B[po]
;W[qo]
;B[gp]
;W[fo]
;B[cq]
;W[eq]
;B[gq]
;W[dr]
;B[bo]
;W[bm]
;B[go]
;W[gn]
;B[fn]
;W[dn]
;B[fm]
;W[hn]
;B[gl]
;W[cp]
;B[cl]
;W[cm]
;B[dl]
;W[bl]
;B[jl]
;W[qc]
;B[qd]
;W[pc]
;B[nc]
;W[oc]
)(;W[eq]C[KataGo's ninth choice. White 50.5 % winrate (-1 pp) at 6,326 playouts (out of 1,428,831).]
;B[fp]
;W[dn]C[This would be common. White sort of helps black to get a good position here.]
;B[cl]
;W[hc]
;B[gc]
;W[dl]
;B[cq]
;W[er]
;B[co]
;W[do]
;B[cn]
;W[cp]
;B[bp]
;W[bq]
;B[br]
;W[bo]
;B[aq]
)(;W[hc]C[KataGo's seventh choice. White 50.5 % winrate (-1 pp) at 16,455 playouts (out of 1,428,831).]
;B[gc]
;W[qc]
;B[qd]
;W[pc]
;B[nc]
;W[oc]
;B[od]
;W[nb]
;B[rc]
;W[rb]
;B[ob]
;W[nd]
;B[mc]
;W[pb]
;B[mb]
;W[ne]
;B[le]
;W[ng]
;B[ph]
;W[he]
;B[lg]
)(;W[qc]C[KataGo's eighth choice. White 50.5 % winrate (-1 pp) at 52,406 playouts (out of 1,428,831).]
;B[qd]
;W[pc]
;B[nc]
;W[oc]
;B[od]
;W[nb]
;B[rc]
;W[rb]
;B[ob]
;W[oa]
;B[mb]
;W[pb]
;B[md]
;W[dn]
;B[eo]
;W[eq]
;B[do]
;W[co]
;B[fp]
;W[dm]
;B[cp]
;W[cq]
;B[bp]
;W[bq]
;B[fm]
))(;B[fc]C[This low approach is much more common. Afterwards, the top side becomes sort of uninteresting. There might be a shoulder-hit later on, or some other move to keep this side low (all comments on this game by Anton Christenson, EGF 3d).]
(;W[dj]C[This is a common joseki here.]
)(;W[gd]
)(;W[ge]
)))