(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.7]CA[utf-8]
GN[Untitled]
PW[Kudo Norio]WR[9P]
PB[Michael Redmond]BR[9P]
EV[Judan C]
DT[8-22-2019]
KM[6.5]
RE[B+0.5]MU[0]MU[0]MU[0];B[pd];W[dp];B[pp];W[dd];B[fq];W[nc]
C[White 6 is a fairly popular move. This stone will change how we play the LL corner, with a ladder involved. ]
;B[cn];W[dn];B[dm];W[en]
(;B[bo]
C[Black 11 was an unusual move that I wanted to try out. The more popular attachment involves a ladder (see var). ]
;W[bp];B[cp];W[cq];B[co];W[eq];B[fp];W[ep]
(;B[cj]
C[At first I intended to extend on the lower side with 19, but I changed my mind (see var). ]
;W[jp];B[lq];W[qf];B[pf];W[pg];B[of];W[qe];B[qd];W[md];B[oc];W[od]
(;B[pe]LB[ob:A]
C[I connected at31, while I could have played at A. I always thought that both of these two moves would lead to a sequence similar to the actual game, until Leela showed me a new move (see var). ]
;W[pc];B[ob];W[pb];B[qg]
(;W[rc]
C[White 36 was greedy. The variation was simple, and good for White.]
(;B[rd]
C[37 was too submissive (see var). ];W[qh];B[rg];W[rh]
(;B[og]
C[Black should have cut (see var). ];W[ph];B[rf];W[ql];B[qn];W[go];B[jr]
;W[fc]
C[White has outplayed Black in this opening. ];B[qk];W[rk];B[pk];W[qj];B[rj]
;W[rl];B[qi]
C[Her I am grabbing some territory in the hope to disturb White, as I realize that the game is difficult. ]
;W[pj];B[pi];W[oj];B[ri];W[ol];B[oi];W[nj];B[pm];W[pl];B[gd]LB[nn:A]
C[ I should have protected at A. ];W[fd];B[be];W[bd];B[ce];W[cd];B[dg];W[dj]
;B[ci];W[dl];B[cl];W[em];B[cm];W[nq]
C[White has a comfortable lead. ];B[np];W[op]
C[Extending at A was an option for White 80, while the game move is good enough. ]
LB[oq:A];B[oq];W[oo];B[pq];W[mp];B[nr];W[no];B[mq];W[hr];B[iq];W[hq];B[ip]
;W[hp];B[rn]
C[Black 93 is a big move for territory, and I am hoping to gain something from taking away an eye from the marked group. ]
TR[nj][ol];W[io];B[lp];W[po];B[qo];W[jq];B[om];W[nm];B[mm];W[nn];B[ln];W[ml]
;B[ll];W[lk];B[kl];W[mn];B[lm];W[nh];B[ni];W[mi];B[mh];W[lj]
C[White's group is alive now. ];B[kr];W[id];B[lh];W[ke];B[le];W[me]LB[ld:A]
C[White should have simply answered at A. ];B[je]
(;W[kd]
C[Covering on the fourth line with 122 would leave a weakness for Black to exploit (see var). ]
;B[jd];W[jc];B[ic];W[kc];B[ie]
(;W[ib];B[hd];W[hb]LB[le:A]
C[Black gained a few points in the fight starting with A, but is still behind. ]
;B[ad];W[ac];B[ae];W[df];B[cf];W[bc];B[qc];W[qb];B[oe];W[nd];B[rb];W[ra]
;B[sc];W[nb];B[li];W[mj];B[kf]LB[ng:A][nf:B]
C[With 147 I have prevented White A, which can now be captured with Black B. ]
;W[lf];B[mf];W[jf];B[kg];W[eg]
C[With 152, White had a stronger move at A．]LB[dh:A];B[ef];W[ff];B[de]
;W[ee];B[eh];W[df];B[fg];W[ef];B[dh];W[gg];B[ig];W[jh]
C[This peep muddied the waters when White could have won simply by playing at A. ]
LB[bq:A];B[jj];W[jk];B[ij];W[ih];B[jg];W[kj]LB[lo:A][bq:B]
C[With 170, White is making an issue of the ko at A, but he still had a win if simply taking the endgame point at B. ]
;B[ir]LB[bq:A][jo:B][hn:C]
C[Black 171 is not usually as big as the cut at A, but in this case the weak points created at B and C make it bigger. ]
(;W[jn]
C[While Black was threatening to cut at A, White had a forceful way to protect while threatening a ko in the center (see var). ]
LB[jo:A];B[ko];W[jo];B[im]LB[bq:A][lo:B]
C[If I had taken the big move at A instead of 175, I still would have lost the ko at B. This was a real option, with chances to sacrifice some stones in the center with a trade. ]
;W[ik];B[hk];W[hj]
C[At this point I had a difficult choice, whether to play an atari as in the game, or just extend as in the varation. A quick count indicated that it was extremely close, so I used my remaining time, maybe about a half hour, in an attempt to calculate the yose to the end of the game. I found the game variation easier to calculate, a half point win for Black.]
(;B[gj]
C[See the variation for Black extending instead of 179. ];W[hi];B[gk];W[bq]
;B[hs];W[gs];B[is];W[gr];B[hn];W[ho];B[kk];W[ii];B[el]
C[Getting this cut was my compensation for allowing White to play at A. ]
LB[bq:A];W[fi];B[ej];W[gm];B[fh];W[gi];B[ei];W[fl];B[ek];W[hm];B[il];W[ji]
;B[np];W[qp];B[rp];W[nq];B[kn]LB[in:A][ld:B][mr:C]
C[With 207 I could of played A with the same result, but the game move is simpler, with A and B being equal points. I am avoiding issues with the cut at C. ]
;W[ld];B[in];W[jl];B[hl];W[sj];B[oh];W[mg];B[nf];W[hf];B[if];W[lg];B[ng]
;W[le];B[kh];W[gn];B[np];W[qq];B[qr];W[nq];B[gc];W[gb];B[np];W[rq];B[rr]
;W[nq];B[sb];W[oa];B[np];W[mo];B[ap];W[aq];B[ao];W[do];B[ge];W[gf];B[si]
;W[nq];B[kq];W[sm];B[sn];W[sk];B[rm];W[gh];B[jm];W[gl];B[hg];W[np];B[pn]
;W[sl];B[id];W[qa]
C[Black wins by half a point.])
(;B[gk];W[gj];B[hn];W[ho];B[il];W[jl];B[jm];W[kk];B[bq];W[br];B[ap];W[hf]
;B[if];W[kn];B[lo];W[km];B[fk];W[ek];B[fj];W[fi];B[ei];W[fh];B[ej]LB[ar:A][hh:B]
C[At this point in my calculations I felt that Black was getting pushed around in the center, and decided to focus on the game move for 179, keeping this as a second choice. Frankly, I ran out of time to finish calculating this during the game, but later analysis indicates that this was better, with Black winning by 1.5 points.]
))
(;W[jo];B[bq];W[br];B[ap];W[lo];B[ko];W[kp];B[mo];W[hf];B[if];W[lo];B[ik]
;W[kn];B[jl];W[hi]LB[jo:A][sj:B][cg:C]
C[Connecting at A makes the following ko direct and easy for White to execute. Since White has plenty of ko threats at B or C I have omitted showing Black fighting the ko. Even if Black manages to live in the center, White's local profit in the center will compensate for Black taking the endgame move in the LL corner, and White wins.]
))
(;W[ng];B[oh];W[hd];B[he];W[hc];B[gc];W[ib];B[hb];W[ic];B[ge];W[gb]
C[White should exchange A for Black B while possible. When compared to the game sequence, WhiteC gains 4 points locally with minimal loss for White in the center. ]
LB[ng:A][oh:B][hd:C]))
(;W[jd];B[kf];W[kd];B[lc]LB[nb:A][ld:B]
C[A and B are miai. ]))
(;B[ph];W[og];B[rf];W[ng];B[pi];W[qj];B[qn]LB[ph:A]
C[This is close to an even fight, with White having a slight advantage. 
]
))
(;B[rg];W[go];B[qn]TR[qe:qf]LB[rg:A]
C[White cannot save the marked stones. Black A gives me a strong position towards the right side, and a positional advantage. ]
))
(;W[qh];B[rg];W[rh];B[ph];W[og];B[re];W[ng]
C[White has a good position. ]))
(;B[ob];W[pc];B[nb];W[qc];B[oe];W[nd];B[rd];W[rc];B[qg];W[mb];B[qh]LB[pc:A][nb:B]
C[White A is actually a popular move in this joseki, but with Black B Leela is showing me a new move. The rest of the moves follow naturally and could even be called forced. Black has a good position. ]
))
(;B[jq];W[dk];B[cc];W[cd];B[dc];W[fc];B[ec];W[ed];B[fb]
C[While I had intended to extend on the lower side at A, I could not find a satisfying continuation after White pincers at B. Leela just invades the UL corner 3-3 point. It actually makes sense for Black to play away, as Black's group on the left can live with the cut at C and is not in danger. ]
LB[jq:A][dk:B][bq:C]))
(;B[cp];W[cm];B[co];W[dl];B[dq];W[em]LB[nc:A][qp:B]
C[Note that White needed the stone at A for this ladder to work. I played a very similar game against Cho U back in 2018 (a Black stone at B instead of 3)when he had the Meijin title. In this variation, White's winning percentage has gone up a few points, so this is good for White (according to Leela). ]
))

