(;GM[1]FF[4]SZ[19]AP[SmartGo:2.8.3.0]CA[shift_jis]
GN[SAWMG2012_R1]
PW[Jiaxi TUO]WR[3P]
PB[Chulhan CHOI]BR[9P]
EV[SAWMSG]RO[1]
DT[20121212 ]
PC[Peking China]
KM[7.5]
RE[B+4.5]
US[www.cyberoro.com]
AN[Michael Redmond]
C[SAWMSG Round 1
December 12, 2012, Beijing, China
W: Jiaxi TUO 3P
B: Chulhan CHOI 9P
Commentary by Michael Redmond
Edited by Chris Garlock

Tuo is a relatively young player, very high in the world rankings right now. Choi has been representing Korea for some time now; he's known for his fighting strength and usually plays an exciting game, as you'll see here. 

This was the most evenly-matched game of the first round, featuring top players from Korea and China. ]
MU[1];B[pd];W[dd];B[qp];W[dq]LB[oq:A][ck:B][co:C]
C[In recent years, a black play at A has become popular, with white responding on the left side at either B or C]
;B[lq]LB[oq:A][pj:B]
C[this is similar to the shimari at A, but gives black a larger framework when black plays at B]
;W[qf];B[nc];W[rd];B[fc]LB[cf:A][qh:B]
C[white A is the most common variation here, and black will then likely pincer at B]
;W[df]LB[qh:A]
C[ the pincer at A would be a popular variation these days]
(;B[ck]LB[ch:A][co:B]
C[makes miai of A and B];W[ci];B[co];W[cm];B[ep];W[eq];B[fp];W[gq];B[dl]
;W[cp];B[bo]
C[the play in the lower left corner is a joseki variation];W[db];B[qh];W[qc]
;B[qe];W[re];B[pf]
C[the variation is actually the more common move]
(;W[ob];B[gp];W[hq];B[hp];W[iq];B[ip];W[jq];B[lo];W[oc];B[jd]
C[interesting: black played thickly on the left side but lightly on the upper side. this makes sense because black's framework is in the lower right area]
;W[qn]LB[qq:A][qk:B]
C[against Chinese-style openings (such as the extension at 5) this is one of the ways you can approach the corner. W38 makes miai of A and B]
;B[pl];W[qq];B[pq]
C[usually white cuts, as in the variation]
(;W[rq]LB[rp:A][pp:B]
C[A and B are miai];B[qo]
(;W[qj];B[pj];W[ro]LB[pp:A]
C[this looks like an overplay but since white has the cut at A, it's playable]
;B[rp];W[sp];B[rn];W[so]
C[neither of the two variations work for black, so he comes up with an unexpected continuation]
(;B[qm]
C[Choi's nickname is "the poisonous snake" because of his ability to unexpectedly attack and kill groups ]
;W[pn];B[pp];W[rm];B[rl];W[sn];B[qr];W[rr];B[or];W[nm];B[ol]
C[the variation is too heavy for white ]
(;W[ln];B[on];W[pm];B[om];W[ql];B[qk]
C[trying to avoid the ko (see var) is bad for white]
(;W[rk];B[qm];W[qs];B[pr];W[ql];B[fq];W[pk];B[fr]LB[dm:A]
C[this looks bad, but it's actually a more even trade than it might seem. Although the lower left corner is dead, white still has some aji at A ]
;W[ko];B[ok];W[jp];B[mo];W[jm];B[qk];W[sl];B[dm]
C[now the aji in the lower left is gone and the whole corner is dead];W[bj]
;B[bk];W[lp];B[mp];W[lr];B[kp];W[kq];B[jo]
C[the variation is bad for white]
(;W[kn];B[in];W[lp];B[mq];W[jn];B[io];W[kp];B[eb]LB[cb:A]
C[this threatens to invade the corner at A];W[ec];B[fb];W[hc];B[hd];W[gd]
;B[gc]
C[white is trying for a squeeze here, but the variation is not good enough]
(;W[hb]
C[see var for the variation white is hoping for]
(;B[fd];W[id];B[ge];W[ie];B[kc];W[jb];B[ne];W[ig];B[gg];W[ff];B[gf];W[ei]
;B[hh];W[ih];B[hj];W[gr];B[fs];W[nd];B[me];W[cc]
C[white needs this move to make the right side territory.];B[eg]
C[black is looking to make an extra eye while forcing white to protect his territory]
;W[ii];B[od]
C[I would have played as in the var]
(;W[hi];B[gi];W[fh];B[fg];W[gj]
C[this attack is an overplay on white's part];B[dg];W[cg];B[cf];W[ce];B[fj]
C[the var shows how white cannot kill the black group]
(;W[gk];B[ch]
C[this starts a squeeze play by black];W[bf];B[bh];W[dh];B[dj];W[bp];B[dp]
;W[di];B[bi];W[cj];B[ej];W[ak];B[al];W[bg];B[hk]TR[gj:gk]
C[now black has a secure lead; he's connected and captured the two marked white stones. 

No further comments; B wins by 4.5

]
;W[hl];B[aj];W[ah];B[gl];W[hm];B[rf];W[nb];B[mc];W[mr];B[lj];W[lh];B[jj]
;W[jk];B[fi];W[ai];B[ij];W[lb];B[kb];W[ka];B[mb];W[ma];B[lc];W[la];B[kl]
;W[kk];B[lk];W[jl];B[kh];W[cr];B[dr];W[er];B[ds];W[ki];B[kg];W[li];B[kj]
;W[ji];B[gm];W[ak];B[bl];W[ll];B[ml];W[lm];B[qi];W[pk];B[na];W[oa];B[qk]
;W[rj];B[pc];W[pb];B[qd];W[rc];B[nh];W[mg];B[jf];W[if];B[je];W[ng];B[lg]
;W[mh];B[ni];W[og];B[qg];W[hn];B[gn];W[eh];B[gh];W[nr];B[nq];W[nn];B[no]
;W[mf];B[lf];W[ed];B[ef];W[ee];B[ri];W[sh];B[se];W[sd];B[sf];W[si];B[ic]
;W[jc];B[nl];W[fe];B[gb];W[oh];B[oi];W[ga];B[fa];W[ha];B[ja];W[ia];B[rs]
;W[ns];B[gs];W[hs];B[ps];W[ho];B[go];W[mi];B[mj];W[of];B[oe];W[ph];B[pi]
;W[po];B[oo];W[jg];B[da];W[ca];B[gd];W[sj];B[rg];W[im];B[ik];W[ea];B[aj]
;W[da];B[ak];W[pk];B[kr];W[qk];B[le];W[jr];B[ss];W[sq];B[qs];W[ja];B[he]
;W[ib];B[hf];W[ic];B[hg];W[na];B[jh];W[qb];B[pg];W[nf];B[sg];W[rh];B[os]
;W[sr];B[mn];W[mm];B[il])
(;W[gh];B[ef];W[bf];B[gk];W[fi];B[he]
C[alive; plus black has made some potential territory in the center]))
(;W[fj];B[hi];W[ef];B[eh];W[dh];B[gk];W[mr]
C[this looks like a close game now]))
(;B[ic];W[he];B[id];W[fd];B[ib];W[ea];B[ha];W[fa];B[gb];W[ei]
C[in this var, white strengthens the corner while squeezing from the center as well]
))
(;W[fd];B[hb];W[ic];B[id]
C[failure for white; not a successful squeeze]))
(;W[lp];B[kn];W[mq];B[kp]
C[white is confined to the side ]))
(;W[qs];B[pr];W[qm];B[sk];W[rs];B[ko]
C[black still has a ko]))
(;W[pm];B[ql];W[mn];B[km]
C[although this group will probably live, white thought this was too heavy]
))
(;B[rm];W[pp];B[po];W[op]LB[pn:A][oq:B]
C[A and B are miai and black collapses])
(;B[pn];W[qm];B[rm];W[ql]LB[qj:A]
C[the white stone at A makes it possible to capture the two black stones]
))
(;W[pr];B[oq];W[or];B[nq]LB[rp:A]
C[Black's play at A is forcing (white must play to live in the corner), and also gives black a strong position on the right side ]
))
(;W[pp]LB[lq:A]
C[there are two variations here; the second one only works when black has a stone in the vicinity of A]
(;B[rq];W[qr];B[po];W[op];B[qo];W[oo];B[pn];W[mp];B[lp];W[rr]
C[also an even trade])
(;B[qr];W[rq];B[po];W[op];B[qo];W[oo];B[pn];W[pr];B[oq];W[nq];B[or];W[nr]
;B[ps];W[mp];B[rr];W[lp]
C[this looks playable for both sides])))
(;W[pg];B[qg];W[rf];B[gp];W[hq];B[og]
C[ladder favors black]))
(;B[qh];W[qc];B[qe];W[re];B[pf];W[pg];B[qg];W[rf];B[og];W[gd]LB[df:A]
C[this is a popular variation these days; when w presses at 10 it works well with the high shimari at A]
))

