(;GM[1]FF[4]SZ[19]AP[SmartGo:3.1.4]CA[shift_jis]
GN[26annotated]
PW[AlphaGo]
PB[AlphaGo]
EV[AlphaGo selfplay]RO[26]
KM[7.5]
RE[W+R]
RU[Chinese]MU[0];B[pd];W[cd];B[pp];W[dp];B[ed]
C[AG still likes the high approach, and in the Zero version it can play this move or the low approach at A. In modern human games, the low approach has become more popular. ]
LB[ec:A];W[ec];B[fc];W[dc];B[fd];W[cf];B[mc]LB[jd:A][qc:B]
C[When compared to the joseki move at A, Black 11 reduces the value of a White invasion at B, so I could say that Black is getting more territory this way. The tradeoff is that White now has plenty of room to invade the upper side.]
;W[qq]LB[qj:A][qk:B]
C[Thousands of years of accumulated knowledge indicate that White should split the side with A or B, leaving room for a two space extension. This version of AG is said to have started with the human data but it plays the 33 invasion anyway. One thing I learned from AG is that in an opening position like this, the difference between these various moves is very small, and there are a number of move choices that will not be an outright mistake, even at the pro level. An invasion to the upper side is also feasible. ]
;B[qp];W[pq];B[nq];W[oq];B[op];W[nr];B[pj]
(;W[ld]
C[Cutting on the fourth line would start a fight in the lower right (see var). ]
;B[md];W[lf];B[me]LB[dd:A][jd:B]
C[It has become the fad to force with Black A as the fight starts, but it is not clear to me that Black always gains from that move. Otherwise, Black could have played at B to strengthen the upper side and attack White on a large scale. ]
;W[qh]
(;B[qe]TR[qd]
C[If Black attacks more strongly, White will be able to live with an attachment to the marked point (see var). ]
(;W[le]
C[White could have lived on the right, but switches back to the upper side instead (see var).]
;B[kb];W[qc]LB[pc:A][re:B][qf:C][rf:D][nb:E]
C[With this annoying probe White is asking if Black will answer at A or B. If Black A, White has forcing moves at B, C, or D. that will change how the right side is played. If Black answers White 28 at B, White has nothing much immediately, but a peep at E can give White a not-quite-living shape that could create potential for forcing moves from outside, or maybe even a fight to capture with the surrounding Black group. ]
(;B[cq]
C[Playing away from the UR corner would have been my idea also, but without AG to show it to us, I would never think of this 3-3 invasion. Attacking White from the center seems natural to me (see var). ]
;W[cp];B[dq];W[ep];B[fr]
(;W[hf]
C[White can live in the UR corner, but since it weakens White on the outside, it is not necessarily good for White (see var). ]
;B[fg];W[li];B[mh];W[lh];B[mg];W[mi];B[oh]
(;W[gh]
C[The aji in the corner has not gone away, but it is still premature for White to make use of it (see var). ]
;B[dg];W[fq];B[jg];W[lg];B[gq];W[lc];B[lb];W[gp];B[gr]LB[fq:A][gr:B]
C[Some dancing around from White 44 (A) to Black 51(B). White played two forcing moves in the lower left, but the center is so important that AG seems to be toying with the idea of ignoring them. ]
;W[nb]
C[The annoying peep is well-timed. ]
(;B[mb]
C[Black is not tempted to play away, because of it's weak shape on the right (see var). ]
;W[id]
C[This final move in the outside fight is still more important than the corner. ]
;B[cg];W[pb]
C[Now White lives. This move is worth about 30 points. ];B[nj];W[ei];B[ci]
;W[qk]TR[qh]
C[Squeezing a little more potential from the marked stone. ];B[rd];W[rc]
;B[ri];W[np]TR[qk]
C[The marked stone will come into play as White cuts to start another fight. ]
;B[mq];W[no];B[mr];W[rp];B[ro];W[rq];B[pn];W[rn]
(;B[gg]
C[Black cannot play strongly on the right side (see var), so instead starts a fight in the center. ]
;W[hg];B[hh]
C[Once Black cuts here, this fight in the center becomes more important than anything else. ]
;W[ni];B[pk]
C[This move is an alternative to the normal shape at A. Black is trying to improve the lower part of the right side. ]
LB[oi:A]
(;W[gi]
C[White 78 is the good shape move, while playing an atari from outside and attempting to capture Black is a move that I would consider, and reject in this case (see var). ]
;B[hi];W[hj];B[ji];W[ij];B[jj];W[jk];B[gj]
(;W[eh]
C[Again White plays the good shape move. The more forceful atari would have been a bad mistake (see var). ]
;B[kk];W[jl];B[kj];W[eg]
(;B[df]
C[Saving the cutting stones does not seem to give Black a good result (see var). ]
;W[ff];B[kl];W[jh];B[ih];W[jm];B[km];W[jn];B[lo];W[pl]TR[qh][qk][pl][rn][no:np]
C[More trouble on the right. All of the marked stones are not quite dead enough for Black to get the territory. ]
;B[ol];W[oi];B[pi];W[om]
(;B[qn]
C[Black has trouble on both sides, and cannot succeed with a cut on the fourth line (see var). ]
;W[ph]
(;B[ql]
C[If Black answers this cut directly, there is more trouble brewing on the right side (see var). ]
;W[og];B[ce];W[oe];B[od];W[nl];B[pm];W[oj];B[nm];W[or]TR[no:np]LB[or:A]
C[With the connection at A, White is still making uyse of the marked stones. ]
(;B[kn]
C[If Black plays away with 117, there will be trouble inside Black's territory (see var). ]
;W[kq]
C[One final forcing move. ];B[lp];W[ok];B[on];W[bq];B[br];W[bd];B[dd];W[bf]
;B[be];W[ae];B[de];W[bb];B[mf];W[nh];B[dj]LB[dk:A]
C[I want to play 133 at A. ];W[cl];B[na];W[oa];B[oc];W[ob];B[rf]
C[The whiole sequence in this corner was for Black to force with 139 and create an escape route at A for the Black group. ]
LB[rh:A];W[rb];B[cc];W[cb];B[fb];W[db]
C[The forcing sequence from 141 to 144 establishes an eye for Black on the upper side. ]
;B[gk]
(;W[hl]
C[I created a var for this move in which White attempts to kill one of the big Black groups, and fails. ]
;B[ej];W[hc]
C[Since Black can play at A to make an eye, White 148 does not directly attack Black's group on the right. ]
LB[ib:A];B[dm];W[cm];B[hp];W[ho];B[ip];W[fm]
(;B[rh]
C[Black decided that protecting the left side is not good enough (see var). ]
;W[jo];B[jp];W[bj];B[bg];W[af];B[dl];W[bp]
(;B[jc]
C[This is the point where Black seems to give up on the idea of a normal endgame. The var shows how Black can easily make life, but will not have enough territory. ]
;W[hb]LB[fd:A][lh:B]
C[Now there is a Black group at A and a White group at B, both of which are in danger, but the Black group is bigger. ]
;B[go];W[fp];B[cn];W[bn];B[hn];W[io];B[fn];W[kh];B[hk];W[ik];B[ii];W[en]
;B[fl];W[fo];B[gn];W[em];B[gl];W[gm];B[hm];W[il];B[dn];W[eo];B[bo];W[bm]
;B[co];W[ao];B[an];W[am];B[ad];W[ac];B[ag];W[ad];B[ab];W[aa];B[jd];W[je]
;B[ke];W[ie];B[kf];W[ig]TR[lg:li][kh]
C[Black resigned. Black can capture the marked White group by playing at A, but White can capture Black on the left with the sequence to D. E and F are miai, and White is alive on the left. White leads by about 20 points. ]
LB[kd:A][jf:B][kg:C][gf:D][eq:E][in:F])
(;B[bi];W[cj];B[ef];W[gf];B[di];W[kh];B[ii];W[ig]
C[Black has an eye at A, and a second eye at B or C, but White is winning by territory. ]
LB[ah:A][fe:B][hb:C]))
(;B[ck];W[bk];B[bj];W[dk];B[cj];W[kh];B[ii];W[qi];B[qj];W[rh];B[ib];W[hb]
;B[pf];W[of];B[sd];W[jc];B[jb];W[ek]
C[White has a small lead.]))
(;W[ej];B[hl];W[ib];B[hc];W[ic];B[rh];W[dk];B[hp];W[hn];B[ik];W[bj];B[bg]
;W[af];B[bi]LB[ib:A][hc:B][ge:C][ah:D][hl:E]
C[White A cut off the Black groups and forced Black to protect on the right, while Black's peep at B combined with the forcing move at C an eye on the top. Black's second eye is at D. After Black played at E, White was already in trouble in the center, so this is bad for White. ]
))
(;B[ck];W[mm];B[nk];W[nn];B[ok];W[lp];B[kp];W[mp];B[kq];W[kn];B[ln];W[lm]
;B[ko];W[lk];B[ll];W[mk];B[ml];W[nm];B[kh];W[jf]LB[mm:A][nk:B][lp:C]
C[When White plays at A, Black B is the strong response that Black would like to play, but it leads to disaster. With the tesuji at C, Black falls apart. White wins the semeai by one move. ]
))
(;B[og];W[ok];B[nl];W[oj];B[rj];W[ml];B[nm];W[mm];B[nn];W[mn];B[on];W[lp]
;B[mp];W[mo];B[kn];W[kp]TR[no:np]
C[When White connects up to the marked cutting stones, this creates trouble for Black's group in the center. A and B are miai.]
LB[lr:A][nk:B]))
(;B[pm];W[ql];B[nl]LB[on:A][ph:B]
C[If Black plays this move at A, White can make trouble on the other side with a cut at B. ]
;W[on];B[rm];W[so];B[qm];W[po];B[rk];W[qn]
C[White captures 4 Black stones with tempo. This is good for White. ]))
(;B[ge];W[df];B[he];W[ie];B[ib];W[mk]
C[While this would have been exciting, it looks more dangerous for Black. ]
))
(;W[fj];B[gk];W[ik];B[fk];W[ek];B[el];W[dk];B[ej];W[dj];B[fi];W[fh];B[eh]
;W[fi];B[di];W[ej];B[dl]
C[Black captures a clump of White stones to end the game. ]))
(;W[hi];B[ih];W[ii];B[ji];W[jj];B[gi];W[fh];B[gj];W[jh];B[kh];W[ki];B[jh]
;W[ij];B[eh];W[fi];B[ej]
C[This is the simple version of what might happen if White tries to capture Black in the center. Playing White A at B would be a more dangerous try, but this fight is bad for White in any case. ]
LB[ij:A][hj:B]))
(;B[so];W[om];B[pm];W[pl]LB[rl:A][qi:B]
C[White A threatens to push through at B. With this forcing move, the fight to capture becomes dangerous for Black. ]
))
(;B[ie];W[mb];B[jd];W[mf];B[oe];W[og];B[pg];W[ph];B[oi];W[ne];B[nd];W[nf]
;B[qg];W[oc];B[od];W[rd];B[rh];W[ii]LB[mb:A][mf:B][je:C][jc:D]
C[When White cuts at A and the pushes through at B, Black gets pushed around a bit on the right. White still has some aji with a wedge at C combined with D, so White's position in the center will hold together. ]
))
(;W[re];B[rd];W[qd];B[rc];W[pe];B[qf];W[rf];B[pf];W[rb];B[qb];W[pc];B[sb]
;W[ra];B[qa];W[od];B[of];W[sd];B[sa];W[rg];B[ob];W[rj];B[jg]
C[This is just one example of the corner fight. Black can capture the corner, but White gets an easy life on the side. The problem for White is that Black A is a strong attack against White's group in the center. ]
LB[jg:A]))
(;W[re];B[rd];W[qd];B[rf];W[pe];B[qf];W[rc];B[pf];W[oe];B[oc];W[sd];B[ng]
C[White lives in the corner, but Black will get compensation with the outside attack. ]
))
(;B[lh];W[mf];B[oh]
C[This attack looks fairly effective for Black, and I want to play this way. ]
))
(;W[rj];B[qk];W[rk];B[ql];W[rl];B[qm];W[rg]
C[White can slide to the second line to live here. If at any point Black covers on the second line, the 3rd line cut will give White sufficient aji to break out into the center with good shape. ]
))
(;B[ph];W[pg];B[oh];W[qd];B[qe];W[re];B[rd];W[qc];B[rf];W[pe];B[qf];W[rc]
LB[sd:A][od:B]
C[White is alive with A or B next.]))
(;W[np];B[mq];W[mr];B[lq];W[no];B[rq];W[rr];B[lo]LB[ro:A][pj:B]
C[Black's stones on the right are resilient with the shape move at A and the supporting stone at B. ]
))

