(;B[pd]GM[1]FF[4]SZ[19]AP[SmartGo:2.5.0.0]CA[utf-8]
GN[Russia-Hungary]
PW[Dmitriy Surin, Russian Federation]WR[6d]
PB[Csaba Mero 6d, Hungary]BR[6d]
EV[WAGC]RO[3]
DT[2009-05-28]
KM[6.5]
RE[B+ 5.5]
US[NHK; transcribed by Chris Garlock]
AN[Michael Redmond 9P]
C[Ecopa Arena, Fukuroi City, Shizuoka Prefecture, Japan
Round 4, May 28, 2009
W: Dmitriy Surin 6d, Russian Federation
B: Csaba Mero 6d, Hungary
Commentary by Michael Redmond 9P, transcribed by Chris Garlock. Originally published on the International Go Federation’s Ranka Online: <http://ranka.intergofed.org/>

Although the 4-round match between the Russian Federation’s Dmitriy Surin 6d and Csaba Mero 6d of Hungary was the last of the day Thursday, ending well after 5P, it could have been one of the first games finished when Mero had a chance to crush Surin with a devastating cut with move 27. Michael Redmond 9P’s commentary takes a close look at the joseki variations, as well as Mero’s decision to chase Surin’s near-eyeless center group in the wrong direction and then ease off at a critical moment. At move 98, Surin “had a chance to stay in the game if he played calmly,” says Redmond. Instead, he started a fight that “just made things worse,” losing the opportunity to make the game close.


]
;W[dd];B[pq];W[dp];B[qk];W[mp];B[jp]
C[so far, pretty normal. the game move is maybe the most complicated. w is sort of hoping for a trade, of the corner for the lower side or something. c is an older joseki that's pretty mushc disappeared. d is more recent and played by some players]
(;W[pp];B[op]
(;W[oo]
C[the hane on the top was also a variation on the tsuke but it too seemed to die out]
;B[oq]
C[normal move; W's follow-up at b is the only move I've seen in pro play. ]
(;W[po]
(;B[no];W[qq];B[qr]
C[reverts to the normal sequence];W[np];B[mo]
(;W[nr]
C[this makes it too easy for B];B[rq];W[qp];B[or];W[nq];B[ps];W[lo]
C[I don't know why B did not cut at b; B wins the semeai and the ladder and/or geta doesn't work]
(;B[mm]
(;W[pl];B[lp];W[lq];B[kp];W[ms];B[os];W[kq];B[jq];W[jr];B[ir];W[ks]
C[The living sequence was pretty good, but B seems to have an overall advantage in the overall position]
;B[ql];W[rp];B[sr];W[qm];B[pk];W[ol];B[rm];W[qn];B[kn];W[nc];B[pf];W[qc]
;B[pc];W[pb];B[qd];W[rb];B[rc];W[qb];B[rn];W[nm];B[mn]
(;W[ro];B[on]
C[the exchange for 58 and 59 destroyed W's almost alive shape and turned it into a potential gote eye. Prob he overlooked the possibility of 59; this made the whole game difficult for W now]
(;W[ml];B[nn];W[lm];B[ln];W[pm];B[nj];W[lk];B[nk];W[nl]
C[B is satisfied; he's not only accomplished his goal of reinforcing his right side, he's also taken away most of W's eyespace. So he has no immediate goal right now for chasing the while stones, so that's why B chose to leave it. But the group is a huge liability for W. ]
;B[cf];W[fc];B[cj];W[oh]
C[So W's trying to make trouble. Dangerous move because of the weak stones in the center.]
;B[ph]
C[B chooses to play conservatively now, so W's move was a good kikashi];W[pi]
;B[oi]
C[because of this exchange there some bad aji for B, which helps protect W's group.]
(;W[ch]
C[this maybe a bit too abrupt; after B's response, there aren't enough weak B stones to attack; plus, B's next move really cramps the lower left corner.]
;B[cn];W[co];B[dn]
C[b is probably better]
(;W[fq]
(;B[nh]
(;W[mi]
C[Even now, b seems more natural]
(;B[ki];W[jk];B[mh]
C[B is playing in the wrong direction, playing from his strong stones. He's prob looking at the upper side, but it would be more natural to move into that area while attacking W]
;W[ij];B[kl];W[kk];B[cq]
C[Because W didn't play at A, it's easy for B to move in here now]LB[eq:A]
;W[dq];B[bo];W[cp];B[bp];W[bq]
C[W really had no choice here];B[ef];W[bd]
C[B should still be thinking on a much larger scale; for example with the variation at b]
(;B[di]
C[W has a realistic chance of staying in the game if he plays calmly. The ensuing fighting just made things worse for W. ]
(;W[dh];B[eh];W[ei];B[ej];W[fi];B[fj];W[eg];B[fh];W[gi];B[fg];W[bf];B[dg]
;W[ce]
C[B is looking at going after the three center stones, so that's why he played the capture, to increase his liberties.]
;B[hi];W[jl]
C[Might be more effective for B to play at b; this whole sequence has been a loss for W so B can be satisfied with taking the three stones.]
(;B[bg]
(;W[hq]
C[In the variation beginning with b, B guarantees his eyes and resumes the attack on W. When W squeezes out in the center, B will have no problem erasing W's potential upper side territory. In the actual game, B was a bit generous but W is too far behind now to catch up.]
(;B[hp];W[iq];B[ip];W[gp];B[km];W[jh];B[ll]
C[Although B ensures his eyes, it's a bit early and winds up reinforcing W. 

Even so, W has missed his chance to stay in the game and although there's a lot more play]
;W[mk];B[af];W[ae];B[be];W[oj];B[ni];W[bf];B[gr];W[gq];B[be];W[ok];B[pj]
;W[bf];B[hj];W[li];B[be];W[qi];B[qh];W[bf];B[nd];W[ag];B[oc];W[rd];B[re]
;W[sc];B[ob];W[ci];B[dj];W[lh];B[se]
(;W[gh];B[ig];W[md];B[mc];W[lc];B[nb];W[hf];B[hg];W[ld];B[if];W[hk];B[ii]
;W[gk];B[gj];W[id];B[sd];W[sa];B[rc];W[ri];B[rk];W[rd];B[hd];W[ie];B[he]
;W[hc];B[fd];W[gd];B[ge];W[gc];B[rc];W[sl];B[sk];W[rd];B[aq];W[cr];B[rc]
;W[sn];B[rl];W[rd];B[je];W[fe];B[gf];W[lb];B[rc];W[so];B[sm];W[rd];B[jd]
;W[ic];B[rc];W[rh];B[rg];W[rd];B[bh];W[rc];B[bi];W[jf];B[jj];W[jg];B[ik]
;W[il];B[lg];W[lf];B[mg];W[kh];B[br];W[ne];B[cq];W[sj];B[sh];W[bq];B[ee]
;W[ed];B[cq];W[qg];B[pg];W[bq];B[mf];W[me];B[cq];W[nf];B[ng];W[bq];B[kf]
;W[le];B[cq];W[ih];B[hh];W[bq];B[kg];W[ke];B[cq];W[mj];B[og];W[bq];B[mb]
;W[el];B[dl];W[em];B[cq];W[hn];B[bq];W[dr];B[en];W[fn];B[fo];W[gn];B[fk]
;W[gl];B[ep];W[eq];B[la];W[ka];B[ma];W[kb];B[fl];W[fm];B[dm];W[jn];B[jm]
;W[im];B[oe];W[sq];B[sp];W[rf];B[qf];W[sq];B[rr]
C[B wins by 5.5])
(;W[sd];B[hc]
C[Seems like B has a slight lead, but it depends on how far W can invade the upper side]
))
(;B[hn];W[iq];B[km]
C[B guarantees his eyes and resumes the attack on W. When W squeezes out in the center, B will have no problem erasing W's potential upper side territory]
))
(;W[cg];B[bh];W[df];B[ci];W[cf];B[gj]))
(;B[gj]))
(;W[hq];B[iq];W[jl]
C[this puts more pressure on B; looking at a simple move at A; the more W fights the more dangerous it gets. I wonder if W started playing more aggressively because he felt like he was behind. But actually W still has good potential to catch up on terr; his biggest problem is his weak group]
LB[bf:A]))
(;B[ce];W[cd];B[fi]))
(;B[jk];W[ki];B[ii];W[kg];B[ef]
C[now it's clear that it's B who's taking the offensive; this is the direction that B wants to move in]
))
(;W[jl]
C[Puts pressure on B's lower side]))
(;B[jk];W[li];B[nh]
C[This is a more natural sequence. B is so satisfied that he's playing a little cautiously. Keeping momentum in the game is more important than relying on his lead. Slack moves at this point can easily lose the advantage]
))
(;W[eq]
C[This more or less erases the invasion and is more territory]))
(;W[cn]
C[This is a calmer way to play, and W is still aiming at A, splitting B into two weak groups]
LB[ch:A];B[bd];W[cc];B[dh];W[hq]
C[This variation will lead to a fairly close game now]))
(;W[nn];B[nl]TR[ol];W[om];B[ok];W[pn]
C[a bit painful...]))
(;W[ml];B[ll];W[mk]
C[gives W and eye in the center and potential for the second eye on the side, so it's almost living and good enough foir W]
))
(;W[kp];B[om];W[rp];B[rr];W[qm]
C[Should be playable for W; very difficult for B to successfully kill]))
(;B[lp]
(;W[ln];B[nn];W[kp];B[lq];W[kq];B[lr]
C[B wins the semeai])
(;W[rp];B[rr]
(;W[ln];B[nn];W[nm];B[on];W[om];B[pn];W[qm];B[qn];W[rn];B[ro])
(;W[pk];B[ln]
C[better for B than in the game]))))
(;W[rr]
C[shape move is here; in fact this is the only move I would think of];B[pr]
;W[nr];B[rq];W[qp];B[rs];W[kq]
C[B is not completely alive here, so it looks playable for W; leads to a complicated fight. ]
))
(;B[qq];W[mn];B[fq]
C[I think this is ok for B; W still has a weak group there]))
(;W[qq]
(;B[qp];W[po];B[rq];W[qr];B[rr];W[qo];B[rp];W[mn]
C[this again is considered playable for B; my understanding of the position is that is why the marked stone variation leads to this result with is considered good for B]
TR[oo])
(;B[no];W[po];B[qr])))
(;W[qq];B[oq];W[qp];B[on];W[qn];B[fq];W[cn]LB[hq:A]
C[W is looking at possible invasion at A or moving out the single W stone. In this variation the game usually develops into a fight starting on the lower side.]
))
(;W[oo];B[qo];W[gp];B[jn];W[mm]
C[something like this would be a traditional way to follow up here])
(;W[po];B[oo];W[on];B[op];W[nn];B[pn];W[pm];B[qn];W[qm];B[ro];W[rn];B[qo]
;W[nl]
C[this was more common when I was a young pro but it kind of disappeared when a consensus developed that the white wall is still weak and B has a slight advantage]
)
(;W[hq]))