(;AP[GOWrite:3.0.15]SZ[19]ST[0]CA[UTF-8]FF[4]GM[1]RE[W+R]PW[Sorin Gherman]GN[ ]PM[2]FG[259:]HA[0]KM[7.5]C[Commentaries by Yamashiro Hiroshi 9p and Tsuruta Kazushi 4p (both from Japan) during the "strong players workshop" (fuseki only), and later Li Yuankun 1p from China (in more detail).]PC[San Diego, CA]DT[2017-08-06]PB[Daniel Gourdeau]EV[US Go Congress 2017, Masters]RO[2]GC[Daniel Gourdeau http://agagd.usgo.org/player/14664/];B[co];W[pd];B[nc];W[qf];B[cd];W[pp];B[ic]
(;W[ep]
(;B[eo]
(;W[fo]LB[do:A]C[Li  suggested A instead, to avoid white focusing on the lower side too much as it happened in the game.];B[en];W[dp];B[cp]
(;W[ip]C[Chinese 1p liked this compared to A.]LB[cq:A];B[cq]C[Chinese 1p said at this point that white's direction is actually not good.]
(;W[nq]C[Yamashiro approved of white's play so far.

Li crriticized white's overall position, too many stones on the lower side.];B[dg]
(;W[cc];B[dc];W[dd]
;B[ec]C[Yamashiro didn't like this, "mottai nai" (meaning "too bad...", like in a loss without a compensation).];W[id]C[Yamashiro liked this move :-)];B[jd];W[je]
(;B[ke];W[ie]
(;B[kf];W[jc];B[kd];W[hc];B[ib];W[fc];B[hd]
;W[ed]C[very good for white];B[cb];W[bc];B[bb]
(;W[db]C[Li\: Bad, white loses points.];B[eb];W[fb];B[da];W[ce];B[gd]
;W[fd]C[good, possible because of white's previous mistake];B[hf]C[Good for black, white lost any advantage and is behind. even if white can squeeze with A, having 3 stones captured in the center is very bad. ]LB[jb:A]
(;W[bg]C[Should capture at A instead.]LB[bd:A];B[bd];W[be];B[ac]
(;W[ch]
;B[df]C[unnecessary exchange];W[de];B[cj];W[dh];B[rp];W[qp];B[ro];W[rq];B[qh];W[pb];B[rf]
;W[re];B[pf]
(;W[qe]C[Li\: bad, white should get sente with A-B, then play around C.
It didn't even occur to me during the game to try to get sente here, for some reason I thought I am ahead and no need to try harder \:-(]LB[qg:A][pg:B][qm:C];B[qm]
(;W[om]C[should be A instead, see the variation for comments]LB[qk:A];B[rr];W[qr];B[sq];W[qq]
(;B[ko]C[bad, should be A]LB[pk:A];W[kq];B[fq];W[fp];B[er]
(;W[ql]TR[om]C[Should not attach (which lets black easily connect with hane), but invade instead.
The previously suggested invasion move was B, but now that white has the extra triangle marked move in the area, A is more aggressive, white tries to capture one of the black groups above or below.]LB[qj:A][qk:B]
(;B[pl]C[better play peacefully to connect with hane from below, A]LB[rl:A];W[pm];B[qk];W[qn];B[rl]
;W[rn]C[Li: not necessarily good enough for white.]
(;B[gp]
(;W[go]C[White should play at A instead, to make harder for black to cut in good shape.]LB[ho:A];B[ho]C[Li: black uses his stones in this area very efficiently.];W[hp];B[gq]
(;W[io]LB[gm:A]C[Li: absolutely impossible to win for white if he loses those stones. Should fight with A!];B[hn];W[in];B[gm];W[dj];B[ck];W[dk];B[cl];W[ol];B[ei];W[di]
;B[eh]
(;W[bi])
(;W[jb];B[gc];W[hb];B[gb];W[ia];B[ga];W[bi];B[ic];W[lc];B[mc]
;W[lb]
(;B[cf];W[bf];B[ah];W[ff];B[eg])
(;B[he];W[me];B[cf];W[bf];B[ah];W[ff];B[eg];W[ef];B[fe];W[fj]
;B[gh];W[gi];B[hh];W[fl];B[hk];W[hl];B[gl];W[gk];B[hj];W[fm]
;B[il];W[dl];B[ne];W[nf];B[oe];W[mf];B[pg];W[oa];B[lq];W[kp])))
(;W[gm]
(;B[io];W[jp];B[jo];W[jl])
(;B[hn];W[fm];B[jq];W[jp];B[kp]
;W[kr]C[Not sure why during the game I thought I cannot fight here, and decided to discard those stones instead - I must have misread something.

I thought white is ahead during most of the game, and even after sacrificing the game is still close.
Li strongly disagreed though.])))
(;W[ho];B[go];W[gn];B[hq];W[fn]
;B[hn]C[harder for black to cut, compared to the game]))
(;B[ho]C[Li: even better for black, to not allow white to play any tesuji.];W[hp];B[gp];W[go]
;B[gq]C[reverting to the game]))
(;B[rl];W[pl];B[rk]
;W[kl]C[Proper direction for white (not A as I had suggested)]LB[jn:A]))
(;W[qj]TR[om]C[Most aggressive in this case, with white's triangle marked stone on the board. White will try to kill some black stones on the right side.]))
(;B[pk]C[black should play here, white cannot fix his lower side moyo in one move\: if white A, black can still invade at B, while if white plays from the center, black reduces with C-D-E]LB[dr:A][kq:B][fq:C][fp:D][fr:E]))
(;W[qk];B[pl];W[pk];B[nl]
;W[pi]C[White needs to invade and fight here, even if it may feel uncomfortable, no other way to try to catch up.]))
(;W[qg];B[pg];W[qm]))
(;W[ci]C[Li: this i s better than kosumi.
My opponent also suggested this during the post-game analysis.]))
(;W[bd]
(;B[bg];W[fg])
(;B[bf];W[fg])))
(;W[he]C[White gained a lot already, keep it simple.

(Both Yamashiro and Li suggested this move in different analysis sessions).

Yamashiro's comment ended here, I didn't have time to show the rest of the game that day.
I had the chance to have Li comment the rest of the game during the last day of the tournament though, and I was very happy I did that since she pointed out that my assessment of the situaiton during most of the game was completely wrong.]))
(;B[jc];W[kf];B[lf];W[le];B[kd]
;W[kg]C[Yamashiro showed this, white is good as it builds thickness.];B[mf]
;W[df]C[Last comment.])
(;B[kd];W[hc]
;B[ib]C[Li\: black is ok]))
(;B[jc];W[ie]))
(;W[ec];B[dc];W[de];B[dd]
;W[eg]C[Tsuruta's guess to AlphaGo's play here \:-)]))
(;W[cg]C[Li suggested this standard invasion.]
(;B[ed];W[cj])
(;B[ci];W[dd];B[dc];W[cc];B[ce];W[ec];B[db];W[bc];B[eb];W[fb]
;B[bb];W[de];B[cf];W[df];B[bg];W[bh];B[ch];W[dg];B[bf];W[fd]
;B[gc];W[fc];B[cb]
;W[he]C[One of the main variations found in the pro database.])))
(;W[cq];B[fp];W[fq];B[gp];W[gq];B[hp];W[hq]
(;)
(;B[ip]
(;W[do];B[dn];W[cn];B[bq];W[dr];B[bn];W[cm];B[bm];W[cl];B[br]
;W[fm];B[fn];W[gn];B[gm];W[gl];B[hm];W[em];B[go];W[dm];B[hn]
;W[jr];B[di])
(;W[bq];B[eq];W[dq];B[iq])
(;W[iq];B[jp];W[do];B[dn];W[cn];B[bq];W[dr];B[bn];W[cm];B[bm]
;W[cl];B[br];W[fm];B[fn];W[gn];B[gm];W[em];B[go];W[hn];B[gl]
;W[dm];B[fo]
;W[jn]C[Complicated fight. Black A is not sente.]LB[jq:A]))))
(;W[do]
(;B[dn];W[dp];B[cp]
;W[cq]C[Li said she doesn't now this as a joseki, but it should be playable for white.

I added some variations found in my pro database.]
(;B[cm]
(;W[bn];B[cn];W[fo];B[en]
;W[dr]TR[bn][cn]C[Most popular variation found in the pro database (with or without the triangle marked exchange).])
(;W[gp];B[bq]
;W[dr]C[Another variation from the pro database.]))
(;B[en];W[gp];B[bq];W[dr];B[cr];W[dq];B[br]
;W[jp]C[Another variation from the pro database.])
(;B[bq];W[dr];B[br];W[cn];B[cm];W[bn]
;B[bo]L[ci];W[bm];B[cl];W[en];B[dm]
;W[fo]C[Another pro database variation, where black had a stone at A though.]L[ci]))
(;B[dp];W[dn];B[cp]
;W[fo]C[The ladder is good for white.])))
(;B[dq];W[eq];B[dr]
;W[en]C[Another common variation, white feels good this way.]))
(;W[dq];B[ep];W[eq];B[fp];W[gq]
;B[dj]C[Yamashiro: Nothing wrong with this either: giving the opponent what they want is not necessarily bad.

Li: black looks good, white should avoid this.])
(;W[ec]C[In reply to Yamashiro saying that the lower left corner is pretty much the obvious place to play next (to avoid a black shimari there), Tsuruta mentioned that AlphaGo might play some forcing moves first in the upper-left.];B[dc];W[de];B[dd];W[id])
(;W[eq]C[Li also mentioned this too as an option.]))
