(;GM[1]FF[4]SZ[19]AP[SmartGo:3.0.1]
GN[AlphaGo_selfplay_10a]
PW[AlphaGo]
PB[AlphaGo]
KM[7.5]
RE[W+Resign]
RU[Chinese]ST[2]
AN[Michael Redmond 9P]MU[1]
C[AlphaGo-AlphaGo Game 10 (Part 1)
Commentary by Michael Redmond 9P
Edited by Chris Garlock and Myron Souris 

This game is like two games in one, and it starts with an unusual pincer by black and then a new move by white. Then there's a series of fights that goes in a circle around the board, each one contained but each quite exciting. 

The game is so complex that the commentary is being released in two parts; Part 1 goes through move 112 and Part 2, which will be released Saturday, October 7 at 6p EDT, contains the remainder of the commentary. Enjoy!]
;B[pd];W[dd];B[pq];W[dp];B[fq];W[cn];B[jp];W[po]
(;B[ql]
C[Black's low 2 space pincer is unusual, and the 'human' move would be a high pincer. With Black stones on both sides, White cannot play aggressively here (see var). ]
(;W[om]
C[White 10 is a new move that makes miai of the right and lower sides (see var). ]
(;B[pj];W[np]TR[om]
C[With the extra marked stone, now White can play the keima at 12 (see var). ]
(;B[nq];W[mp];B[mq];W[lp]
(;B[fc]
C[Playing away to take the initiative on the upper side shows how AlphaGo is flexible and likes to control the flow of the game. ]
;W[df];B[mc];W[ec];B[fd];W[lq]
C[White 22 is a large move that changes the status of the lower side, the LR corner, and ultimately the right side too, if Black plays away (see var). ]
(;B[qp]
C[Black 23 makes more than 10 points in the corner, and strengthens Black's position on the right side, so it is a big move with good aji. ]
;W[hc]
C[When White pincers at 24, it might seem natural to move out with the two Black stones (see var). ]
(;B[ch]
C[Showing an unhuman lack of concern for the two stones on the upper side, Alphago just plays away. Black 25 is actually a large point that takes away White's potential on the left side. ]
;W[ld]
C[When the upper right area is Black's biggest potential moyo, it is usually bad to play this shoulder hit, as it allows Black to build on that moyo. White is trying to attack Black on the upper side. ]
;B[md];W[lc];B[le];W[ke];B[kf]LB[le:A]
C[A go proverb tells us to hane at the top of two stones, as Black did with A. Black's double hane at 31 is the natural continuation, so this shape is good to remember. ]
;W[je];B[jf];W[lf];B[me];W[if];B[lg];W[ie];B[cc]TR[ch]
C[Black invades at 39, offering to sacrifice the two stones on the right. This can work very well with the marked stone if White cooperates (see var). ]
(;W[cd]TR[fc:fd]
C[With 40, White refuses to allow Black to sacrifice the marked stones. ]
;B[jc]
C[Black 41 hits a vital point in White's shape. 41 threatens to connect to the right, but Black is also looking to play forcing moves from the left. ]
;W[lb];B[eb];W[dc]
C[Black has some forcing moves from the left (see var). ]
(;B[gf]
C[Black escapes into the center, and Black can play the tsuke next (see var). ]
(;W[ic];B[hd]TR[id]
C[With 47 Black threatens to push through at the marked point. ];W[jb];B[eh]
C[Black 49 is not a connected shape. With White, I would be tempted to continue the attack (see var). ]
(;W[qd]
C[White abandons the attack on the left, and switches to the right side. While I was tempted to attack on the left, the right side is also an important area, as another move by Black would make it a large territory. ]
;B[qc];W[qe];B[rc];W[qi]
C[White plays the widest possible extension to create enough room to make life. ]
;B[qj];W[pi];B[oi];W[oh];B[qg]
C[Black 59 hit a vital point in White's shape, threatening to connect underneath (see var). ]
(;W[rj]
C[The immediate meaning of White 60 is to stop Black from connecting on the right side. Depending on how Black continues, White can live in the upper right, or start a fight on the side (see 2  vars). ]
(;B[ni]
C[Black 61 is a solid move that closes White into the side. Allowing White to live, Black's plan is to build thickness and control the center. ]
;W[qk]
C[When White wedges at 62, the natural move seems to be for Black to cover on the 4th line (see var). ]
(;B[rk];W[pk];B[oj];W[ri];B[rm];W[pg];B[pe];W[qf];B[rg];W[rf];B[se];W[sg]
;B[sf];W[sh]
C[Black cannot kill the White group at this time (see var). ]
(;B[ol]
C[Black makes a strong wall with 77, preparing to attack White in the lower right later. This extra stone also makes a difference in the status of White's group on the right side. ]
;W[sk];B[rl]
C[In a previous comment I said that Black cannot kill the White group, but actually there is a potential ko (see var). ]
(;W[pf]
C[White protects with 80, and after this Black has no forcing moves in the area. This makes a difference later, so it is worthwhile to check out the possibilities (see var). ]
(;B[cl];W[fg];B[gg]
C[After jumping out once at 82, White stops attacking here (see var). ]
(;W[dr]
C[White 84 is an important move that protects White's LL corner. White's only unsettled group is in the lower right now. After some complicated fighting on the upper and right sides, the game seems to be simplifying a bit now. ]
;B[fh];W[db]
C[White 86 is a large move that secures the corner and gives White a lead in territory. ]
;B[kn]
C[Black 87 starts an attack on the White group in the lower right. ];W[pm]
;B[pl];W[qo];B[ro];W[rp];B[rq];W[lm];B[ln];W[pp];B[qq]LB[sp:A][rn:B]
C[With 97 it was better to take at A. Not only did Black lose a couple of points with 97, but this move left the possibility for White to play at B and cut off the Black group on the side. ]
;W[jo];B[ko];W[mn];B[mm]
C[When Black cuts at 101, White cannot capture this stone (see var).]
(;W[kp]LB[mm:A]
C[With 102, White threatens to capture Black A next (see var). ]
(;B[km];W[jq];B[ip];W[rn];B[sp];W[iq];B[hp];W[hq];B[gp];W[hh]
C[White has cleverly dealt with its weak groups, and now it seems that the endgame is about to start. White has an advantage in territory. 

End of commentary for Part 1; see Game 10 Part 2 for commentary for the rest of the game. ]
;B[dn];W[do];B[bn];W[dm];B[bo];W[en];B[cq];W[dq];B[cr];W[dk];B[dl];W[el]
;B[ek];W[fl];B[ej];W[bm];B[bl];W[in];B[hn];W[im];B[hm];W[il];B[hl];W[ik]
;B[gk];W[ll];B[kl];W[lk];B[kk];W[ji];B[nl];W[mf];B[fo];W[cm];B[am];W[lj]
;B[fn];W[mi];B[gr];W[sn];B[nn];W[mo];B[nm];W[qn];B[jj];W[ij];B[nh];W[nf]
;B[li];W[mj];B[ng];W[lh];B[ki];W[kh];B[kj];W[mh];B[mg];W[oe];B[og];W[of]
;B[jh];W[kg];B[ii];W[jg];B[lr];W[kr];B[mr];W[hi];B[hj];W[hr];B[hs];W[on]
;B[op];W[oo];B[oq];W[no];B[is];W[js];B[ir];W[ih];B[ji];W[nk];B[ok];W[ph]
;B[ob];W[fe];B[ge];W[cg];B[dg];W[bg];B[bh];W[eg];B[dh];W[ee];B[gh];W[ah]
;B[io];W[jn];B[gs];W[sl];B[sm];W[sj];B[jr];W[qk];B[lo];W[ml];B[ks];W[nj]
;B[kq];W[nb];B[oc];W[bi];B[cj];W[qm];B[id];W[pb];B[mb];W[ma];B[nc];W[oa]
;B[na];W[bp];B[cp];W[nb];B[pa];W[qa];B[na];W[co];B[bq];W[nb];B[so];W[pk]
;B[na];W[ak];B[bj];W[nb];B[ra];W[na];B[pc];W[jd];B[fb];W[aj];B[al];W[la]
;B[qb];W[pa];B[sb];W[da];B[bk];W[ai];B[ha];W[kr];B[ag];W[af])
(;B[jq];W[ml];B[nm];W[km];B[jn];W[nl];B[nn];W[mo]
C[White captures the Black cutting stones.]))
(;W[ml];B[nm];W[nl];B[nn];W[mo];B[on];W[pn];B[ll];W[km];B[mk]
C[Black wins the race to capture. ]))
(;W[fh];B[db];W[cb];B[eg];W[ef];B[ff];W[fi];B[hh];W[ei];B[cg];W[cj];B[bj]
LB[bb:A]
C[When White pushes through at 1, Black crawls once at 2 and cuts White with 4 and 6, and the White group in the corner is not completely alive. Later Black can attack with a play at A, and this is not good for White. ]
))
(;B[ng];W[ck];B[sj];W[og];B[qh];W[rd];B[sd];W[pc]LB[ng:A][sj:B][pc:C]
C[When White plays away after Black A, and Black tries to kill the White group with B, Black will have trouble when White cuts at C (two vars). ]
(;B[oc];W[pb]TR[sd:sf]
C[When Black takes from above, Black will have trouble saving the marked stones (2 vars). ]
(;B[ob];W[re];B[sc];W[qb]
C[Black loses the semeai in the corner. ])
(;B[qb];W[ob];B[nb];W[od];B[oe];W[nc];B[nd];W[na];B[oc];W[ma]
C[White connects on the side, and the Black group in the corner dies. ]))
(;B[pb];W[oc];B[oe];W[ob];B[qa];W[oa]
C[Black's corner group dies.])))
(;W[ck]
C[White 1 is a big point that sets up to attack Black in the upper left, so if we assume that the group on the right is alive, White definitely wants to play here (2 vars for Black's move). ]
(;B[pf];W[qh];B[og];W[rh];B[qg]LB[qg:A]
C[Throwing in at A is a tesuji that can be found in tsumego problems. Does White take or connect? (two vars)]
(;W[rg];B[nh];W[of];B[ph];W[pc];B[pb];W[oh]LB[oc:A][ob:B][ph:C]
C[When we assume that White A forces Black B, then Black must fight the ko at C to kill the White group. ]
;B[db];W[ng];B[bc]
C[This shows one possible trade. The damage to Black's group in the UR corner is not as bad as one might have expected, and Black's gain in the UL corner is big. This is good for Black. ]
)
(;W[ph];B[sj];W[pc];B[oc];W[pb];B[ob];W[of]LB[ph:A][og:B]
C[When White has connected at A, the value of capturing Black's stone at B is reduced, as White does not get an eye by capturing that stone. ]
;B[nf];W[ng];B[oe];W[mh];B[li];W[rd];B[sd];W[qb];B[rb]LB[qg:A][re:B]
C[Black's stone at A makes a difference in the corner when White tries to make an eye here. White cannot play the atari at B, and the Black stones on the side escape. White is dead. ]
))
(;B[sj];W[pc];B[oc];W[pb];B[ob];W[pf]LB[sj:A][rd:B][qh:C]
C[If Black simply takes away one eye with A, White can live with this sequence. Next White can capture 2 Black stones with B to make a second eye, or if Black protects, White has two eyes by playing at C. ]
)))
(;B[pf];W[qh];B[og];W[rh];B[sj];W[of];B[ng];W[pc]
C[Black can reduce White to one eye with 1~5, but this leaves a weakness in Black's shape when White cuts at 6 and 8. ]
;B[pb];W[oc];B[oe];W[ob];B[qa];W[sd];B[rd];W[re];B[se];W[oa]
C[In the end, Black's corner group dies. ]))
(;B[pk];W[rk];B[pm];W[ol];B[pl];W[pg];B[rg]LB[ri:A][sf:B]
C[When White plays at  6, Black 7 is the shape move, and Black threatens A or B next. ]
;W[rh];B[sf];W[qh];B[sh];W[si];B[sg];W[qf];B[sd];W[of]LB[of:A]
C[Black can reduce White to one eye on the side, but after White A, White can make an eye in the center. ]
;B[ng];W[od];B[pc];W[pe];B[oc];W[rl];B[rm];W[nh];B[mh];W[nf]LB[pf:A][sj:B]
C[White finally lives, with one eye at A and the other at B. ]))
(;B[rk];W[pg];B[ri];W[rh];B[sj];W[rg]LB[rk:A][rg:B]
C[If Black covers at A, White can live with the sequence to B. ])
(;B[pg];W[qk];B[pk];W[rk];B[pm];W[rh];B[rg]TR[ph]
C[Black 1 is a strong move that stops White from living in the upper right, and with the marked cut, White can't escape into the center either. White has no choice but to try to live on the side with 2~6. ]
;W[ol];B[pl];W[rm];B[rl];W[qo];B[nj];W[sl];B[rn];W[ro]TR[oj]LB[qm:A][sn:B]
C[Threatening the marked cut, White can eventually for Black to protect, and make a ko on the side. If Black plays A, White can make a ko with B.  Black's LR corner is becoming weak now, so this looks good for White. ]
))
(;W[pg];B[ri]
C[Black connects, and White has no eyes. ]))
(;W[fg];B[gg];W[fh];B[eg];W[ef];B[ff];W[fi];B[hh];W[dj]LB[db:A]
C[White White attacks at 1, Black must escape to the center with 2~8. Locally, White has an advantage after 9. Black was hoping to use the aji at A, but the side group is too weak for that to work. ]
))
(;W[eh];B[hd];W[ic];B[id];W[jb];B[jd];W[kd];B[gb]LB[eh:A][cb:B]
C[If White splits Black on the left with A, Black can take away White's eyespace with this sequence. Next Black can live with a play at B. This is good for Black. ]
))
(;B[hd];W[ic];B[id];W[jb];B[jd];W[kd];B[gb];W[ge];B[gd];W[eg]
C[Locally, Black wants to play the sequence from 1 to 7, taking away White's eye space, but this is premature. White surrounds Black with 10, and Black is cramped on the side. ]
))
(;W[eb];B[ce];W[de];B[bf]TR[fc:fd]
C[Black scoops out the corner, sacrificing the marked stones. With the added value of creating a living group on the left side, this is good for Black]
))
(;B[ge];W[ld];B[lc];W[jd]
C[If Black moves out with 1, White will also run out with 2 and 4. This will be a running fight in the center, and looks about even to me. ]
))
(;B[ch];W[qq];B[qr];W[rr];B[qp];W[rq];B[pp];W[qo];B[rp];W[ro]LB[rr:A]
C[White's hane at A is the tesuji to attack Black's corner. When White covers at 10, Black might seem to have a number of choices (3 vars for Black's move.) ]
(;B[so];W[sn];B[sp];W[pr];B[or];W[qs];B[rn]LB[qk:A]
C[Black can connect to the side, but the is some troublesome aji with a White attachment at A. This is feasible for White. ]
)
(;B[pr];W[sp];B[lr];W[kr];B[ls];W[jq];B[op];W[oo]LB[pr:A]
C[When Black connects at A, Black will be able to live, but takes a lot of damage on the side. This is good for White. ]
)
(;B[sr];W[pr];B[sq];W[qs];B[or];W[op];B[oq];W[so];B[sp];W[mr];B[os];W[nr]
LB[sr:A]
C[Black's attachment at A is a well-known tesuji that kills the White corner, but it does not work well when Black has a shortage of liberties. Black has no way of avoiding a ko in the corner, and this is good for White. ]
)))
(;B[lq];W[kp];B[kq];W[jo];B[ip];W[nc]
C[If Black connects on the side, White will force from above and take sente to play the kakari at 6. This looks about even, and is how I would play with Black. ]
))
(;B[oo];W[op];B[pp];W[qo];B[on];W[oq];B[rp];W[qp];B[qq];W[ro]
C[It is difficult for Black to save the corner and fight on the outside simultaneously (two vars for Black's move). ]
(;B[rq];W[pm];B[mn];W[pr]
C[White captures the corner. ])
(;B[or];W[nr];B[pr];W[rq];B[rr];W[sp];B[sr];W[nn];B[pn];W[pm]
C[White captures the cutting stones.])))
(;B[np];W[pk];B[qk];W[pj];B[qj];W[pi];B[qh];W[og]
C[When Black answers on the lower side with 1, White can press Black into a low position on the right side. This is good for White. ]
))
(;W[np];B[oo];W[op];B[pp]
C[If White immediately presses at 1, Black will cut with 2 and 4 (2 vars). ]
(;W[on];B[qo];W[no];B[qn]LB[np:A]
C[Although White can capture in a ladder, White ends with an eyeless shape and Black has all the territory. The wasted stone at A reduces the efficiency of White's ponnuki. ]
)
(;W[qo];B[on];W[rp];B[nr];W[pm];B[mo]LB[rp:A][pm:B]
C[White A is the tesuji that allows White to jump out at B. Black captures two stones to have a good position on the lower side, and this favors Black. ]
)))
(;B[pl]
C[In this fuseki, the high pincer is Black's most common move. Jumping  is considered to be bad for White, and switching to the right side is most popular in recent games (see 2 vars). ]
(;W[no];B[nq];W[lo];B[mp];W[mo];B[pi]
C[This is the textbook pattern in which Black can surround both the lower and right sides. White still has an unsettled group, and this is good for Black. ]
)
(;W[qj];B[rl];W[qf];B[qh];W[rh]LB[qj:A][rl:B]
C[When White plays at A, Black B is the strongest fighting move with which Black attempts to put pressure on White's side group. There is no set pattern that I know of after this, but I can say the fighting will start on the right side. ]
)))

