(;GM[1]FF[4]SZ[19]AP[SmartGo:3.0.1]CA[utf-8]
GN[Artem Kachanovskyi 1p - Alexandr Dinerstein 3p]
PW[Artem Kachanovskyi]WR[1p]
PB[Alexandr Dinerstein]BR[3p]
EV[2nd European Professianal Go Championship]RO[1]
DT[2017-02-08]
PC[Azimut Hotel, St. Petersburg ]
KM[7.5]
RE[B+Resign]
RU[Chinese]ST[2]
TM[4500.0]OT[3x45 byo-yomi]VW[]MU[1]
C[This game commentary file accompanies a brand-new series of video commentaries with Michael Redmond 9P and Chris Garlock, Managing Editor of the American Go E-Journal. In March 2016 the two teamed up to provide live commentary on the historic 5-game match between Lee Sedol 9P and AlphaGo -- available on the AGA's YouTube Channel at https://www.youtube.com/user/USGOWeb -- and now plan to do go video commentaries on a regular basis. Each video commentary will be accompanied by sgf commentaries that will include comments and variations by Redmond, enabling the video commentary to focus on the major points in a shorter format. 

We hope that you enjoy this new series and look forward to hearing your feedback; email journal@usgo.org with your comments or questions. 
]
;B[mo];W[dd];B[em];W[pd]
C[Black's high moves at 1 and 3 are an opening that was popularized by Cho U 9P and So Yokoku 9P when they played if for a few months in 2014. Cho and So actually liked to play the 5-7 point in each corner making a symmetric pinwheel-like shape(see var). ]
(;B[cf];W[fd];B[ee]
C[Black 7 is a move that shows up in some of the games played by the Google AI that is now called 'Master'. This move takes a local loss (see var), but since it strengthens Black on the left side it can work well with this opening. ]
(;W[cc];B[og]TR[cc][ee]LB[cf:A]
C[The positive effect of the marked exchange is that Black's stone at A has become stronger than before, and Black can fight strongly on the left side (see var). ]
(;W[nd];B[qp]
C[Now it is natural for White to play towards the LL corner (3 vars added). ]
(;W[ep]
C[The game move];B[gq];W[fo]
C[White moves out, reducing Black's potential in the center. ];B[dq]
C[When both sides are playing high moves on the fifth line like this, Black always has the option of jumping into the corner, and this is a point where Black's game plan can change dramatically from influence-oriented to territory- oriented. ]
;W[eq];B[er];W[dp];B[cr];W[cq];B[dr];W[cm];B[cl];W[bl];B[bk];W[dl];B[ck]
;W[dm];B[ip];W[dk];B[ci]TR[og][mo]LB[em:A][fo:B]
C[Black's potential for moyo is mostly gone now, and in exchange Black has taken territory on the lower and left sides. The two marked Black stones are not ideally placed, and the stone at A is mostly wasted, but White also has played a stone at B that has become inefficient. This opening looks about even. ]
;W[oq];B[mq]
C[How to handle the LL corner? I added 2 vars as suggestions.]
(;W[qn]
C[The game move.];B[ql];W[qq];B[rq];W[pp];B[qr];W[qo];B[pq];W[rp];B[qq];W[oo]
;B[or]TR[qn]
C[The marked stone is almost completely wasted, and White is behind. ];W[pl]
;B[qk];W[pk];B[pj];W[qj];B[qi];W[rj];B[ri];W[oj];B[pi];W[qm];B[rk];W[kd]
;B[hc];W[df];B[kb];W[mb];B[he];W[id];B[hd];W[cg];B[bg];W[bf];B[ce];W[bh]
;B[de];W[be];B[dg];W[ch];B[dh];W[fe];B[bi];W[ag];B[ff];W[gf];B[cd];W[ed]
;B[bd];W[bc];B[ae];W[di];B[fg];W[ai];B[dj];W[ei];B[ej];W[fi];B[gg];W[hf]
;B[ie];W[ak];B[bm];W[al];B[aj];W[eg];B[ef];W[cj];B[ah];W[bj];B[bg];W[fb]
;B[qc];W[qd];B[rd];W[re];B[rb];W[sd];B[sc];W[rc];B[ck];W[bk];B[rd];W[hg]
;B[jf];W[rc];B[am];W[cl];B[rd];W[kf];B[se];W[jg];B[jd];W[ke];B[ic];W[kc]
;B[jc];W[ia];B[lb];W[ga];B[ja];W[la];B[md];W[me];B[lc];W[mc];B[ld];W[oc]
;B[ne];W[oe];B[nf];W[lg];B[pb];W[pf];B[ok];W[ol];B[nk];W[nl];B[ob];W[pc]
;B[ml];W[rf];B[lk];W[nn];B[ig];W[if];B[je];W[ih];B[le];W[lf];B[mf];W[bq]
;B[gi];W[gj];B[hj];W[fj];B[kh];W[kg];B[ge];W[gh];B[hi];W[hh];B[fh];W[ji]
;B[ik];W[li];B[hn];W[mj];B[mk];W[mh];B[nb];W[nc];B[nj];W[mn];B[ln];W[lm]
;B[kn];W[mm];B[br];W[km];B[kj];W[ki];B[ac];W[jn];B[bb];W[cb];B[jo];W[oh]
;B[pg];W[ko];B[lo];W[oi];B[im];W[ph];B[qg];W[ng];B[qf];W[qh];B[rg];W[qe]
;B[of];W[rh];B[sf];W[sh];B[sg];W[io];B[kp];W[hk];B[hl];W[jm];B[gk])
(;W[pn]
C[White makes miai of the side and corner (two vars for Black's next move). ]
(;B[po];W[qn];B[oo];W[qj]
C[Black gets a big corner while White has a good position on the side. This is about even. ]
)
(;B[pl];W[pp];B[qo];W[qq];B[rq];W[qr]
C[White has good shape, and is alive. ]))
(;W[qq];B[rq];W[pp]
C[This is White's most direct way to play (two vars for Black's next move). ]
(;B[qo];W[qr];B[po];W[oo];B[on];W[rr];B[qg]
C[Black can play this way to control the right side while allowing White to live in the corner, and this looks about even. ]
)
(;B[qr];W[qo];B[pq];W[rp];B[qq];W[po]TR[qn]
C[Compared to the actual game, in which White had almost the same shape with a superfluous stone at the marked point, this var is a significant improvement for White (2 vars for Black's next move). ]
(;B[or];W[qk]
C[This is easy for White. ])
(;B[qm];W[no]LB[rn:A]
C[White has the forcing move at A, and can make sabaki. ]))))
(;W[dq]
(;B[co];W[cp];B[do];W[fq]TR[em]LB[dk:A]
C[Playing the kakari at 2 does not work well with the marked stone, it is clear that it would be better for Black to have that stone at A. ]
)
(;B[fp];W[do];B[eq];W[cp];B[fn]
C[If White plays this way, White will get the corner territory while Black continues to surround a moyo in the lower right and center. ]
))
(;W[eq]
C[This kakari makes miai of the lower side and the corner. ])
(;W[dp];B[fp];W[cn];B[cl]
C[In this var White still has to worry about the corner, as Black can still invade. ]
))
(;W[ch];B[fe];W[gd];B[eh];W[dj];B[fj]TR[cc][ee]
C[With most of his stones on the 5th line, Black's default plan should be to focus on the center. Therefore, Black should be happy to confine White on the left side and build on the center like this. Note that the marked exchange has helped to make this possible. ]
))
(;W[ed]TR[ed:ee]
C[Usually White connects. Because of the marked exchange, any Black move in the UL corner area has become ineffective, and Black has virtually thrown out the option of a double kakari or an invasion at the 3-3 point, so that is the negative aspect of Black's marked move (2 vars added). ]
(;B[cc];W[cd];B[bd];W[be];B[bc];W[ce];B[eb];W[fb];B[ec];W[fc]TR[ed:ee]
C[When Black invades at the 3-3 point and follows the joseki sequence to 11, the marked exchange has become very bad, as the White stone is a point that White wants to play anyway, and the marked Black stone is almost useless. ]
)
(;B[hc];W[bd]TR[ed:ee]
C[After the marked exchange, Black 1 does not put much pressure on the corner White group, as White can easily make a solid territory with 2. ]
)))
(;B[og];W[md];B[ge];W[dg];B[qp]
C[An opening seen in a game of So Yokoku 9P. ]))

