(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.2]CA[shift_jis]
GN[2018-03-01a]
PW[Michael Redmond]WR[9P]
PB[Numadate Sakiya]BR[6P]
EV[Kisei FT]RO[Final]
DT[2018-03-01]
KM[6.5]
RE[B+1.5]
RU[AGA (Area)]MU[0]MU[0]MU[0]MU[0]
C[Commentary by Michael Redmond];B[dp];W[pp];B[pd];W[cc];B[qq];W[qp];B[pq]
(;W[nq]
C[Both this move and covering on the 3rd line seem to be feasible options for White (see var). ]
;B[oq]LB[nr:A]
C[While Black usually bumps against White as shown, Black can also attach at A, a move that is going in and out of fashion. No one seems to know  if Black A is the best move or not, and I feel safe in saying that the attachment at A involves a large number of complicated variations that are not completely understood as of now. ]
;W[op];B[nr]
(;W[rq]
C[White's hane on the 2nd line sets up a double hane on the left. ];B[rr]
;W[mr];B[rp];W[ro]
(;B[np]
C[Black cuts on the fourth line. Cutting on the 3rd line to capture one stone only works for Black when the right side is low in value. ]
;W[mq];B[sq]
(;W[pn]TR[np]
C[I chose not to capture with a ladder (see var). White has covered on the 2nd line both on the lower and right sides, and has more potential to build territory compared to other variations of the 3-3 invasion joseki. The tradeoff is that Black has some aji with the marked stone. ]
(;B[gq]TR[np]
C[Black encloses the corner towards the lower side, hoping to later make use of the marked stone. It is not good for Black to move out with this stone immediately (see var). ]
;W[qf];B[nd];W[pi]TR[pn][ro][op]LB[no:A]
C[While surrounding an area on the right, White is also reinforcing the marked group to reduce the threat of a Black play at A. ]
(;B[fd];W[df]LB[cf:A]
C[I had trouble choosing between this move and the low extension at A. ]
;B[jc]
(;W[jd]TR[df]
C[When I have played high (marked stone), the value of the next move on the left side is increased, so it would have been reasonable for me to continue with an extension on the left (see var). ]
;B[id];W[kc];B[kd];W[je];B[lc];W[ic];B[kb]
(;W[jb]
C[I was tempted to play this atari, but it was not reasonable to hope that Black might connect. I should have simply captured with a ladder. ]
;B[ch]LB[hd:A]
C[Black plays a big point, and will try to make some good ko threats in the UL corner. This move also breaks the ladder when White plays at A. ]
;W[kc]
(;B[eg]
C[Black lost an opportunity to play strongly on the left (see var). ];W[ef]
;B[dd];W[cd];B[ce];W[cf];B[be];W[de];B[bf];W[ed];B[ff]LB[eg:A][ef:B]
C[Starting with the exchange of Black A for White B, Black has succeeded in making White B a bad shape, as it is an empty triangle. However, Black's stones are not well connected, and this is not working for Black. ]
;W[fg];B[eh];W[gg];B[jc]
(;W[fc]TR[id]
C[White's hane was a slack move. To cool down the upper side position, I should have just captured the marked stone (see var). ]
;B[ej]LB[fc:A][hc:B]
C[While the fight on the upper side started well for me, I gave most of that advantage back with the slack move at A. For now, the left side and center of the board are more important than the upper side, but Black can start a large ko later by playing at B. There is a good chance that the timing of this ko, and the resulting trade will be a decisive point in this game. ]
;W[cg];B[bg];W[ci]
(;B[bi]
PL[B]TR[ci]
C[White played the marked tsuke to see how Black would respond. Black's hane underneath was correct (see two variations). ]
;W[dh];B[bh]
(;W[cq];B[cp];W[dq];B[bq];W[br];B[bp]LB[bq:A]
C[Since the left side is an important territory for Black, it is correct to play the hane at A and connect here, to expand that territory to the utmost. ]
;W[fr];B[dg];W[dc]TR[dh][ci]LB[dg:A][dc:B][hc:C]
C[With the cut at A, Black captured the two marked stones. In exchange, White played the capture at B, strengthening White on the upper side and reducing the impact of a ko when Black later plays at C. ]
;B[fq];W[eq];B[ep];W[gr];B[hq]
(;W[mn]TR[mn]
C[I was correct in thinking that White had an advantage at this point, but it was unfortunate that I was complacent enough to play the marked move, which was slack. I should have started by cerawling once more (see var). ]
;B[ln]LB[ln:A]
C[Black A was a sharp move that tries to surround the center on as large a scale as possible. ]
;W[lm];B[km]
(;W[lo]
C[My atari is a bit too tight, and my play here was based on my judgement that I could win by simply protecting my right side. The center was more important than I realized, and I should have played more aggressively here (see var). ]
;B[kn];W[ko];B[jo];W[jp];B[io];W[ll];B[kl];W[lk];B[kk]
(;W[qd];B[qc];W[pc]LB[qd:A][oc:B]
C[My attachment at A and this cut were an attempt to play some forcing moves here before returning to the center. If Black answers at B, this exchange will have slightly increased White's territory on the right side. ]
;B[lj];W[mj];B[mi];W[nj];B[mm]LB[qe:A]
C[Black needs a big ko threat for the ko on the upper side, so this move creates one. this indicates that Black is about to start the ko, but that is actually premature. He should have played once at A, to enlarge the size of a Black ko threat in the upper right. Aswe will see, Black ends up playing A as a ko threat, and it was not big enough.]
;W[nm];B[ib];W[kc];B[mo]TR[mk][cr]LB[mo:A]
C[The ko on the upper side is very big, and for instance, the marked points are not big enough to be valid ko threats. Black A is the only valid threat that Black has. ]
;W[nn];B[jc];W[ei]LB[ei:A]
C[White A is big enough to be a valid ko threat. ];B[di]LB[ei:A][di:B]
C[While it was necessary for White to win the ko, it must be noted that the exchange of A for B was a local loss for White. ]
;W[kc];B[qe];W[jc];B[rd]
(;W[kj]
C[White's cut here should have been the losing move, although as it turned out, I had one more chance to win later in the game. I should have simply reduced Black center (see var). ]
;B[jj];W[li];B[gi];W[ji];B[ij]LB[lj:A]
C[While it is said that a ponnuki is worth  points, White's capture of the stone at A was small in this board position, and it can be said that generally, ponnukis are not that big when all of the neighboring groups are alive anyway. Black's center territory has expoanded by about 10 points, and now Black has a small lead. ]
;W[rf];B[pf];W[pg];B[og];W[of];B[pe];W[ph];B[ar];W[hr];B[jq];W[kq];B[ip]
;W[kp];B[kr];W[lr];B[lp];W[lq];B[ir];W[bs];B[lb]LB[lb:A][or:B][nf:C][ab:D][ja:E]
C[Black is is the biggest endgame move, and B, C, D, and E are also big moves. ]
;W[nf];B[so];W[rn];B[sn];W[sm];B[sp];W[rm];B[hs];W[dr]
(;B[os]LB[os:A][mf:B]
C[If one ignores the center, Black A is the biggest move. However, Black could have won more easily by attaching at B (see var)]
;W[md]LB[md:A]
C[With the attachment at A, White can reduce Black's upper side and expand White's center. With this move, White has a winnable position. ]
;B[ld];W[nc]LB[od:A]
C[White threatens the wedge at A. ];B[ne];W[me];B[mf];W[le];B[mc];W[ke];B[nb]
;W[ng];B[ms];W[ks]LB[ks:A]
C[White resists with A, and another huge ko is about to start on the lower side. ]
;B[js];W[jr];B[hg]LB[hg:A]
C[White cannot afford to allow this attachment at A to work. Once Black plays here, the fight in the center becomes more important than the ko on the lower side. ]
;W[hh]
(;B[gh]
C[Black does not have time to take the ko (see var), but must continue in the center. ]
;W[hi]
(;B[ig]
C[This was a chance for Black to take the ko on the lower side (see var). ]
;W[hj];B[ii];W[ih];B[jh];W[jg];B[hk]
(;W[kh]
C[Capturing here was the losing move. If I had pushed through into the Black territory I would have won by a small margin (see var). ]
;B[gj];W[jh];B[kr]
(;W[oe]LB[oe:A]
C[White A was a desparate ko threat that loses points locally. The other ko threat doesn't work either (see var). ]
;B[od];W[jr];B[nh];W[iq];B[mg];W[gf]
C[After the ko ends, the rest of the endgame will be relatively simple. Black has a small lead. ]
;B[jq];W[is];B[ja];W[hb];B[iq];W[gs];B[ab];W[bb];B[re];W[sf];B[qg];W[rg]
;B[qh];W[rh];B[oi];W[oj];B[qi];W[qj];B[bd];W[bc];B[ac];W[ia];B[ka];W[ri]
;B[oh];W[lg];B[mh];W[se];B[lf];W[sd];B[sc];W[fh];B[fi];W[kf];B[lh];W[ba]
;B[kg];W[ad];B[ae];W[lg];B[or];W[kg]
C[Black wins by 1.5 points. ])
(;W[or];B[pr];W[jr];B[gf];W[iq];B[gd];W[gc];B[jq];W[is];B[iq];W[gs]LB[or:A]
C[White's ko threat at A loses about 2 points. ];B[ja];W[ka];B[la];W[hb]
;B[re];W[se];B[sd];W[sf];B[ab];W[bb];B[hd];W[ie];B[bd];W[bc];B[ac];W[hf]
;B[fh];W[if];B[gg];W[fe];B[ge];W[ee];B[od];W[ia];B[ba];W[ca];B[ad];W[ka]
;B[aa];W[ja];B[oe];W[as];B[aq];W[ls];B[ns];W[he];B[hc]
C[B+1.5]))
(;W[gj];B[gk];W[fj];B[fk];W[kh];B[fi];W[jh];B[kr];W[or];B[pr];W[jr]
(;B[gf]LB[fj:A][or:B][gf:C]
C[By pushing through to A, White gains 4 points compared to the game sequence. White B loses a point or so, but the ko is important enough to justify that. Black now can capture at C or continue the ko (see var). ]
;W[iq];B[gd];W[gc];B[jq];W[is];B[iq];W[gs];B[ja];W[ka];B[la];W[hb]LB[gf:A]
C[If Black simply takes at A, White finishes the ko. After this, Black can play most of the endgame as forcing moves. ]
;B[re];W[se];B[sd];W[sf];B[ab];W[bb];B[bd];W[bc];B[hd];W[ie];B[ac];W[hf]
;B[fh];W[if];B[gg];W[ee];B[od];W[ia];B[ba];W[ca];B[ad];W[ka];B[aa];W[ja]
;B[aq];W[ls];B[ns]
C[White wins by 1.5 points. ])
(;B[ee];W[fe];B[kr];W[no];B[ls];W[mp];B[gf];W[ge];B[fh];W[ka]LB[ee:A][no:B][ka:C]
C[Black's final ko threat at A loses several points, and this time White will give up the ko by protecting at B. After Black captures 2 stones in the center, White C is the largest endgame move. ]
;B[he];W[oc];B[pb];W[la];B[mb];W[hd];B[ab];W[bb];B[re];W[se];B[sd];W[sf]
;B[es];W[er];B[bd];W[bc];B[ac];W[ie];B[hf];W[ja];B[na];W[if];B[ba];W[ca]
;B[gs];W[fs];B[is];W[aa];B[ad];W[ba];B[aq];W[cs];B[od]
C[White wins by 1.5 points])))
(;B[kr];W[hj];B[ls];W[gf];B[hk];W[gj];B[gk];W[fj];B[fk];W[fh];B[fi];W[ei]
;B[fi]LB[hj:A][gf:B]
C[When White plays A and B for the ko threat, the damage to Black's center is relatively minor. Black will win by about 2.5 points. ]
))
(;B[kr];W[fi];B[ls];W[fh];B[fj];W[dh];B[dj];W[hi];B[hj]LB[kr:A][fi:B]
C[If Black takes the ko at A, White can use B as a ko threat. The following trade is about even, and White has a small lead. ]
;W[ka];B[ii];W[ih];B[ab];W[oc];B[pb];W[la];B[mb];W[bb]LB[ka:A][ab:B]
C[A and B were about the same size. ];B[es];W[er];B[re];W[sf];B[bd];W[bc]
;B[ac];W[ja];B[na];W[se];B[sd];W[gh];B[gj];W[no];B[mp];W[gs];B[ba];W[ca]
;B[is]
C[Black will win the final 1-step ko. White wins by half a point. ]))
(;B[mf];W[mg];B[lf]LB[mf:A][lg:B][if:C]
C[Black should have played the attachment at A. With the forcing move at B, Black threatens to jump into White's center area with a Black play at C. Black is ahead by about 10 points before komi. ]
))
(;W[fi];B[fj];W[fh];B[dh];W[gj];B[gk];W[hj];B[hk];W[rf]LB[fi:A][rf:B]
C[I should have started with A to play a forcing sequence in the center before playing the final big point at B. White has a small lead. ]
))
(;W[fi];B[ei];W[hj]LB[lo:A][hc:B]
C[I should have reduced Black's center as in this variation. However, after my play at A, the game is no longer a clear win for White. Much will depend on the timing of Black B to start a ko on the upper side. ]
))
(;W[kl];B[kn];W[jl];B[hr];W[ar];B[mo];W[mm];B[nn];W[nm];B[lp]LB[kl:A][hr:B][lp:C]
C[I should have played strongly with the double hane at A. Black would then force with B and capture the lower side with the sequence to C. ]
;W[or];B[kr];W[kq];B[jr];W[pr];B[qr];W[ns];B[ps];W[so];B[sp];W[on];B[no]
;W[in];B[jp];W[fk]LB[or:A][so:B][in:C]
C[White cannot live with the cut at A, but instead gets forcing moves at B and C. Black has gained more than  points by capturing this group, but has lost a potential territory in the center that is similar to that in size. White now has some extra potential in the center. White has an advantage. ]
))
(;W[hr];B[iq];W[ln]LB[hr:A][jr:B][ln:C]
C[At this time in the game, Black must answer White A, so this was my chance to play this as a forcing move. Without this exchange, Black A becomes a forcing move, threatening White's corner group. When White has crawled once at A, the potential connection at B gives some extra safety to White's stones on the right. White continues with C, and has a clear advantage. ]
))
(;W[ei];B[fi];W[di];B[cj];W[fh];B[dj];W[dg];B[co]LB[ei:A]
C[If White plays at A, White can capture two Black stones with this sequence, but since this is gote for White, it is not good to play this immediately. ]
))
(;B[dg];W[dc];B[bi];W[di];B[ei];W[dk]LB[dg:A][dk:B]
C[Is Black starts with the atari at A, White can still bother Black with the jump at B. ]
;B[dj];W[fp];B[fq];W[cp];B[co];W[do]TR[ci]LB[do:A]
C[Using the marked stones as a sacrifice, White can create aji on the left side with the cut at A. ]
;B[dq];W[cj];B[ck];W[bo];B[cn];W[bk];B[cl];W[cm]LB[cm:A]
C[The wedge at A is a tesuji that will capture two Black stones. ];B[dm]
;W[bm];B[dn];W[dl];B[bn];W[bj];B[dh];W[ai];B[bh];W[bl]
C[This is a success for White. ])
(;B[dh];W[bi];B[bh];W[cm];B[co];W[dk]LB[dh:A][bi:B]
C[If Black simply connects at A, White can force with B and continue on the left side. White's group on the left is stronger than the Black group, and this is good for White. ]
))
(;W[hd];B[ib];W[ie]
C[White has backed out of the ko to get a thick shape. The board position favors White. ]
))
(;B[ce];W[ed];B[dd];W[dc];B[ee];W[ec];B[de]LB[ce:A][jc:B]
C[Black's strongest move is to invade at A. This variation shows a relatively simple sequence that might follow. Black has reduced the value of the upper side, and thus reduced the value of the ko at B. Black has a good position on the left, and this favors Black. ]
))
(;W[hd];B[ib];W[ie];B[gc];W[ck];B[co];W[ff]LB[hd:A][ff:B]
C[Simply capturing with a ladder at A was good enough for White. When White takes the point at B, White has a strong position in the center, and the overall position favors White. ]
))
(;W[cj];B[co];W[iq]
C[I think my choice of joseki in the lower right is working well with this opening, and the overall position is slightly favorable for White. ]
))
(;B[no];W[lo];B[nm];W[pl]LB[no:A]
C[If Black extends at A, the immediate fight favors White. White has prepared for this fight by building a strong position on the right side. ]
))
(;B[no];W[kp];B[pk];W[om];B[lo];W[nl]LB[no:A]
C[If Black extends at A, White will be able to attack Black in the immediate fight. This is good for White. ]
))
(;W[no];B[df];W[fc];B[mp];W[kq];B[mo];W[pn];B[nn];W[pk];B[ko]LB[no:A][iq:B][qi:C]
C[If White plays at A to capture with a ladder, Black will immediately play a ladder breaking move in the upper left. In this variation, Black has potential to attack in the lower right area, with moves such as B or C. This favors Black. ]
))
(;B[mq];W[np];B[lr];W[sp];B[ms]
C[Locally, this is good for White. Black should play this variation when the right side is low in value, so it is not good for Black in this board position. ]
))
(;W[mq];B[mr];W[lq];B[qj]
C[This is an even result, but I did not like it for White in this board position, when it will be difficult for White to make good use of the wall. ]
))
(;W[oq];B[or]
(;W[nr]
C[White can play this double hane or extend on the 3rd line. ];B[nq];W[op]
;B[mr];W[pr];B[ns];W[qr]
C[Taking the corner territory, White avoids the possibility of making an eyeless wall that might be attacked. This is an even result locally, and in this board position.  ]
)
(;W[nq];B[nr];W[mq];B[mr];W[lq];B[qj]LB[mr:A][rp:B][qj:C]
C[In this variation, when White has no stone on the right side, it is correct for Black to crawl at A instead of playing the hanetsugi at B. Black finally plays the extension at C, and it becomes difficult for White to use this wall as influence. I do not like this variation for White in this board position. ]
)))

