(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[6.50]TM[60] PW[Yu Zhiying]PB[Magist]WR[5p]BR[9p]DT[2016-12-29 20:51:02]RO[05]PC[Tygem]C[This the most popular opening played vs Master, so we get to know particularly well what Master is thinking. Highlights 1-9 Master shows its logic in the opening, supporting many ideas that are centuries old. But these days pros play anything in the opening. !! 11-24 A very common sort of opening in pro games, good to see Master agreeing with 11, but 21 and 27 are stunning new moves. B takes huge profit at the top, and thinks hane at the head of 4 stones isn't so important !!! 37-52 A excellent sequence to sacrifice B's weak group, and punish 36 for being slow. B's lead becomes very clear. And we get to open our mind that even such a big group is sacrificeable. !! 53 If this move is optimal, it changes our recognition of this shape. Crude but clear, more of attaching on top of 3rd line stones. ! end B+17.5 ]RE[B+Resign]TC[3]TT[20] ;B[pd]C[Master prefers 4-4 to open, without choosing a direction, (not yet showing its cards)] ;W[dd] ;B[qp] ;W[dq] (;B[nq]C[It is reassuring to see Master value the 3-4 enclosures highly, and never playing double 4-4 as black. This is similar to pro thought. Whereas leelabot thinks the 3-4 and the enclosure are too slow.] (;W[qf] ;B[nc] ;W[qj] ;B[co]C[master likes the low approach so much, thinking that this makes the 3-4 stone very uncomfortable] (;W[ck]C[Master thinks W should have protected earlier, I wonder if it still likes this pincer?] ;B[fp]C[It values this move more than humans. Pros probably think it is hard to use this wall, even though logically following up against the 3-4 should be powerful (C9 is sort of a local tenuki)] (;W[ep] ;B[eo] ;W[fq] ;B[gp] ;W[gq] ;B[hp] ;W[hq] ;B[ip] (;W[iq]C[this is to get sente and is the reason pros haven't dared to play this as B in the past (according to Meng)] (;B[ci]C[so this tenuki is very interesting] (;W[ek] ;B[cf] ;W[ei] (;B[bd]C[played before in pro games but rare] ;W[ef]C[thought to be good for W as the left B shape is weak so ] (;B[fd]C[new move !! brilliant if you can't hope to cut then poke instead] (;W[df]C[correct exchange for W, gains later if B gets 3-3 and creates more B12 aji] (;B[ce] ;W[ed] ;B[jd]C[so B's shape on the left still has issues, but W's influence looks silly without the extension. And it doesn't have great eyespace with the shape poked out and made heavy] ;W[jp]C[the question is whether this move is worth the territory loss at the top? It does look very powerful - though it is only hane at the head of 4 not 3 or 2, the cut at D5 means the F5 cut is more powerful.] ;B[jo]C[! looks crude, and I'm not sure I would think of this, but the 4 stones are now heavy and important to strengthen at the cost of the right] (;W[kp]C[there is still good endgame at L2] (;B[fc]C[W's influence looks really weak now] (;W[rd]C[master almost never plays this move, thinking it too slow, either invading the corner with R17 or living with R16, or tenuki probably this move was a mistake in this position, and the following trade was almost inevitable once B started it.] ;B[dj]C[this combination stops W B12, but as B11 remains, it seems incredibly crude. -the goal is also to break the W eyespace and flexibility though -and to save the lower B group via D9] (;W[ej] ;B[dh] (;W[fn]C[it's normal to expect B to answer here, so this is a good move] (;B[eh]C[but the tenuki seems correct] ;W[ge]C[it's not clear if this makes a good exchange, but the game result means that B retreats a move, so it probably turned out well. I wonder if B could have played more fiercely] ;B[gh]C[only move] ;W[fo]C[only move] (;B[hd]C[B comes back to protect small, without G15, B might aim to make a large capture around J13] ;W[hg] ;B[gg]C[a bit submissive, defends against wedge aji, but primarily aims to solidly capture E14 or get sente I don't see why B responds since W is already disconnected] (;W[cj]C[stopping the cut] ;B[hf]C[W's play means B's capture isn't so big, and W's capture is worth more points, but W has to spend another move, and J4 is not yet dead, so the trade seems even. (B's group was already weak, so sacrificing it means B has less worries)] (;W[bq]C[it is too easy for B to live without this move] (;B[bi]C[huge, over 20 points + aji in W's area] (;W[hj]C[this is a solid and proper move the position is now settled, and we can evaluate who has the advantage. W has 40 solid points at the bottom, maybe 15 on the right, and say potential of 15 in the centre B has 70 solid points at the top, less than 10 on the bottom right (W is so solid), and maybe potential of 10 in the centre there are 2 big endgame points remaining around R7 and R17 since B has sente, B seems to have a clear lead] (;B[pf]C[this seems to be solidifying the weakness that W has, but maybe this is just a good exchange to press W low in the position (the direction of play is good), to help gain control of the centre in sente] ;W[pg] ;B[of] (;W[ph]C[the most solid move for the centre, though a little painful to protect so solidly, perhaps correct] (;B[jj]C[expected, helping reduce the W potential, and growing B's own] ;W[mh]C[W has some weaknesses in the shape, but it can't be helped] ;B[jl] ;W[le]C[W is happy to get this exchange] ;B[lc] ;W[if] ;B[he] ;W[qn] ;B[op]C[I had almost wondered if master ever protects here, but reassuringly, it plays what humans would play.] ;W[rp] ;B[rq] ;W[qo] ;B[pp] (;W[on]C[this is probably a slight overplay, ending up in a bad place, but understandable] ;B[hl] ;W[hn] ;B[in] ;W[hm] ;B[im] ;W[gl] ;B[mk] ;W[qc] ;B[ok]C[simple moves are good enough to break W's shape] ;W[pl] ;B[qe] ;W[re] ;B[qg] ;W[rf] ;B[nh] ;W[ii] ;B[pi] ;W[qh] ;B[qi] ;W[ri] ;B[pj] ;W[qk] ;B[kh] ;W[jg] ;B[mg] (;W[mr]C[this looks like a good move to prevent L2] ;B[lq] ;W[lr] ;B[kq] ;W[mq] ;B[lp] ;W[jq] ;B[kr] ;W[mp] ;B[lo] ;W[no]C[W's area is a little hurt, and B makes extra points in the centre, but the bottom right corner is very hurt, so W gets sente] (;B[ro] ;W[rn] ;B[sp] ;W[bj]C[B should probably have exchanged the monkey jump earlier] ;B[di] ;W[dk] ;B[kf]C[B+R as] (;W[ps] ;B[qr] ;W[ob] ;B[oc] ;W[nb] ;B[mb] ;W[pc] ;B[na] ;W[pb] ;B[sn] ;W[sm] ;B[so] ;W[rm] (;B[hs] ;W[hr] ;B[mn] ;W[nm] ;B[mm] ;W[nl] ;B[nk] ;W[go] ;B[io] ;W[ko] ;B[kn] ;W[hk] ;B[il] ;W[kg] ;B[lg] ;W[jh] ;B[ki] ;W[oh] ;B[ni] ;W[og] ;B[ng] ;W[qd] ;B[pe] ;W[fi] ;B[or] ;W[os] ;B[pr] ;W[ns] ;B[is] ;W[gs] ;B[ks] ;W[ml] ;B[ll] ;W[ik] ;B[jk] ;W[ie] ;B[id] ;W[fh] ;B[fg] ;W[ai] ;B[ah] ;W[aj] ;B[bh] ;W[oa] ;B[ma] ;W[ol] ;B[po] ;W[pn] ;B[gi] ;W[gj] ;B[oi] ;W[rh] ;B[qs] ;W[je] ;B[ke] ;W[nr] ;B[np] ;W[mo] ;B[hh] ;W[ig] ;B[ls] ;W[ir] ;B[js] ;W[jr] ;B[ln]TW[pa][qa][ra][sa][qb][rb][sb][rc][sc][sd][se][sf][qg][rg][sg][sh][si][fj][rj][sj][ak][bk][fk][gk][rk][sk][al][bl][cl][dl][el][fl][ql][rl][sl][am][bm][cm][dm][em][fm][gm][om][pm][qm][an][bn][cn][dn][en][gn][ao][bo][co][do][eo][ap][bp][cp][dp][aq][cq][eq][ar][br][cr][dr][er][fr][gr][as][bs][cs][ds][es][fs]TB[aa][ba][ca][da][ea][fa][ga][ha][ia][ja][ka][la][ab][bb][cb][db][eb][fb][gb][hb][ib][jb][kb][lb][ac][bc][cc][dc][ec][gc][hc][ic][jc][kc][mc][ad][cd][dd][ed][gd][kd][ld][md][nd][od][ae][be][de][ee][fe][ge][le][me][ne][oe][af][bf][df][ef][ff][gf][lf][mf][nf][ag][bg][cg][dg][eg][ch][lh][mh][li][mi][kj][lj][mj][nj][oj][kk][lk][kl][jm][km][lm][jn][rp][oq][pq][qq][sq][rr][sr][rs][ss]C[B+17.5]) (;B[gm]C[this doesn't quite work] ;W[hk] (;B[gn] ;W[il] (;B[fm] ;W[go] ;B[ho] ;W[io]) (;B[ho] ;W[fm] ;B[hl] ;W[hm])) (;B[il] ;W[go] ;B[io] ;W[fl]))) (;W[ng]C[this doesn't work] ;B[og] ;W[lg]C[not sente] ;B[kg])) (;B[pc] ;W[ro] ;B[qr]C[if N2 is sente, B can't easily monkey jump at H1, so this is a big deal] ;W[ms] (;B[js] ;W[pr]C[troublesome] (;B[nr] ;W[np]) (;B[np] ;W[mo]C[W is satisfied to get this move] ;B[nr])) (;B[or] ;W[bj] ;B[hs] ;W[jr] ;B[js] ;W[ks]C[W has the ko option]))) (;W[ob]C[huge, but B is solid enough that this is gote])) (;W[om]) (;W[pl])) (;B[kj]C[in this case this would seem a little slack, as B is solid above])) (;W[qe]C[sometimes this is correct, making P13 huge for both sides] ;B[pi]C[this is shape]) (;W[og]C[this would be a standard attempt to fight back, but the direction doesn't seem great as B has potential in the centre but W doesn't have much potential on the right] ;B[qe] ;W[re] ;B[qg] ;W[rf] ;B[ng] ;W[nh] ;B[mh] ;W[ni] ;B[mi] ;W[nj] ;B[mj]C[the R4 stone is well placed, and W's potential in the centre is reduced] ;W[nk] ;B[mk] (;W[nf] ;B[mg] ;W[od] ;B[pc]C[I'm not sure there is any aji here]) (;W[nl] (;B[qk]C[still some bad aji around here] ;W[qn]C[though overplay at the moment]) (;B[qm] ;W[qq])))) (;B[] ;W[of]C[this is huge to aim at L16, and B thinks B can't easily aim to invade R12 anyway, so may as well settle the position])) (;W[ij]C[this is tempting, but probably an overplay when B has no weakness above the W group is still cut by E5, so W does need to be a little careful] (;B[gj] ;W[gk] ;B[hk] ;W[hj] ;B[gl] ;W[fk] ;B[ik]) (;B[fm])) (;W[hk]C[more solid but B will probably aim to sacrifice J4 now and grow B's area more] ;B[jj]C[still here])) (;B[] ;W[bi]C[if B responds to this, W has already gained, but W B12 is also huge sente endgame] ;B[bh] ;W[di]C[W doesn't have to play here (B might tenuki) and W has already gained points] ;B[ch]C[11 points in sente])) (;W[hj] ;B[dp] ;W[eq] ;B[cq] (;W[cr] ;B[en] ;W[fm] ;B[bq] (;W[bn] ;B[br] ;W[dr] ;B[cn] ;W[bo] (;B[cl]) (;B[bs]C[even this lives])) (;W[br] ;B[cm])) (;W[bq]C[the most severe try] (;B[bp]C[ko exists already] ;W[cr] ;B[br]) (;B[cr] ;W[bp] ;B[cp] (;W[bo] ;B[en] ;W[fm] ;B[bn]) (;W[bn] ;B[en] ;W[fm] ;B[bo] ;W[ao] ;B[bm]))) (;W[bn]C[a good move to attack] ;B[en] ;W[fm] ;B[cn] ;W[bm] ;B[bo]))) (;W[gf]C[this would be heavy shape] (;B[hh]) (;B[dk] ;W[dl] ;B[cl]C[huge]))) (;B[ig] ;W[hc]C[this is very bad aji - even if B saves F17 with space at M17, W can live comfortably])) (;B[fo]C[the plan] ;W[eh] ;B[dk] ;W[dl] ;B[el]C[this is much less powerful now] ;W[fl] ;B[em] ;W[en] ;B[fm] ;W[gm] ;B[dm] ;W[dn] ;B[cl] ;W[cm] ;B[dl] ;W[do])) (;W[eh] (;B[fg]C[this is the standard follow up to break the eyespace flexibility, but in this case it is slightly premature, leaving weaknesses on the left] ;W[eg] ;B[dk] ;W[dl] ;B[el] ;W[cg] ;B[bg] ;W[bh] ;B[ch] ;W[cj] ;B[di] ;W[bi]) (;B[dk] ;W[dl] ;B[el]C[this seems to be the plan]))) (;W[dk] ;B[ej] ;W[fj] ;B[fi]C[this is a problem] ;W[eh]C[though this is sente] (;B[bi]C[it doesn't help W ]) (;B[gi] ;W[ch] ;B[bh] ;W[bi])) (;W[bh]C[maybe this is good timing] ;B[ch] ;W[ej]C[though W's shape is still pretty bad])) (;W[fo]C[I'm not sure what B plays here] (;B[dp] ;W[eq] ;B[fn] ;W[go] ;B[en]C[continue aiming at the top?]) (;B[qh]) (;B[dj])) (;W[bh]C[this seems proper now] (;B[ch] ;W[bi] ;B[bg] ;W[cj] ;B[cc]C[as B takes gote with more points, but W needs the eyespace] ;W[rd] ;B[eh]C[there remains bad aji though, but W may sacrifice to attack the lower B group. Though W has taken gote enough times that the B group is annoyingly flexible and sacrificeable] ;W[fh] ;B[dh] (;W[fg] ;B[fj]) (;W[fi] ;B[fg] ;W[fo])) (;B[bi]C[this doesn't seem to make sense?] (;W[ch] ;B[dh] ;W[di] ;B[dg] (;W[cj] ;B[bg] ;W[bj] ;B[fh]) (;W[eh] ;B[eg] ;W[fg] ;B[cg] ;W[cj])) (;W[cg] ;B[dh] ;W[dg] ;B[eh] ;W[cc])))) (;B[kr] ;W[jr] ;B[kq] ;W[jq])) (;W[ko]C[double hane seems like a possibility] ;B[kp] ;W[jq] ;B[jn] ;W[kn]C[the upper W group is unhappy, but locally the B shape is still bad, and W hurts the bottom right corner more] ;B[jm] ;W[lp])) (;B[cg]C[wrong place we think] ;W[jd])) (;W[ed] ;B[cc]C[maybe just here? (says meng) as W already has no local follow up (D17 or D18 would make E16 overconcentrated) (therefore B has gained a lot of territory)])) (;B[cc] (;W[cg]C[some issues remain]) (;W[bh]) (;W[jp] ;B[fd]C[later W will tenuki this as D16 is light] (;W[hc]C[maybe aim to play here later]) (;W[fo]) (;W[dc]C[eventually aim here])))) (;B[ef] ;W[fc] ;B[bd] ;W[ic]C[the standard pro variation locally (here due to K4, it would probably be different) considered fine for W as E9 is not so weak with the D13 B12 combo])) (;W[jp]C[this hane is still powerful, though not at the head of 2 or 3 (so B is stronger, but B is heavier), with the D5 cutting issue as well so F5 is more powerful see game 9]) (;W[cg]C[see game 14] ;B[dj] ;W[dk] ;B[ek] ;W[el] (;B[fl] ;W[ej] ;B[fk] ;W[ei] ;B[dh] ;W[di] ;B[ch] ;W[cj]) (;B[fk]C[this might be more appropriate as B is more solid here]))) (;B[jp] ;W[cf] ;B[jq]C[this is not as big anymore, so close to O3 when corner aji remains])) (;W[jq]C[normally jump])) (;W[do]C[I doubt master is fond of this either, it reminds me of it's play vs the Kobayashi (game 4)] ;B[dn] ;W[eo] ;B[cp] ;W[fo] ;B[cq] ;W[er] ;B[dr] ;W[eq] (;B[cm]C[would it protect? B's shape is very good and efficient, and W seems overconcentrated especially as B already has O3]) (;B[fc]))) (;W[ep]C[I know it hates this move, so I wonder what it would play. since B already has the enclosure on the right, there isn't much weakness to lean on to fight locally])) (;W[do]C[Master's games show a protection before invading, otherwise the 3-4 stone can get pressured too much])) (;B[co] ;W[oq]C[and this is also what Master plays - if you stop my enclosure, I must stop yours (back to a very classical way of thinking)]))