(;CA[shift_jis]AP[MultiGo:4.4.4]SZ[19]C[Park is one of the top Korean players; he's been on the international scene for several years. He's a steady player with no obvious weak points. Chen's also a top player from China; he's very knowledgeable about some of the more complicated josekis so his opening can sometimes be quite interesting. On the whole, I think he's a strong fighting player, and we certainly will see that in this game.]
GN[SAWMG2012_R3_CHEN_PARK]GC[Michael Redmond]RO[3]DT[20121213 ]PC[Peking China]
PB[PARK Jeonghwan]BR[9p]PW[CHEN Yaoye]WR[9p]KM[7.5]HA[0]RE[W+R]US[www.cyberoro.com]
MULTIGOGM[1]
;B[pd];W[dd];B[qp];W[dp];B[fq];W[cn];B[lq]C[This version of the miniature Chinese opening has become quite popular in recent years. ]
;W[qj];B[qf];W[qm];B[pn]C[It's typical of the Chinese-style openings that black will play this keima, leaning on the weak white group, to make a box-like territory in the lower right]
;W[ro];B[pm];W[qo];B[po];W[rp];B[qq];W[ql];B[fo]C[White can also play immediately to reduce black's framework, as in the variation]
(;W[dr]C[Instead, white makes a solid corner territory. 

If black continues to expand his framework, then white will invade as in the variation]
(;B[ko]C[black protects his lower side with a move I'm seeing for the first time, but it makes sense]
;W[fm]C[this is the key point between two potential moyos; white's on the left and black's on the bottom]
;B[cf]C[it's timely for black to invade the left side at this point];W[ch]C[If black invades in the corner, white will get a nice moyo on the left (see var)]
(;B[ef];W[fc];B[di];W[gp]LB[fm:A]C[White can now start a fight on the lower side, making use of the stone at A]
;B[eq];W[dq];B[go];W[ho];B[hn];W[in]C[black cannot fight strongly here and the sequence is pretty straightforward]
;B[gm];W[ip];B[hq];W[kn];B[jo];W[io];B[gl];W[iq];B[jn];W[hm]LB[gn:A][jm:B]C[white is hoping for black A so he can play at B]
;B[jm];W[gn];B[fn];W[em]C[black's life on the lower side depends on this ko; fortunately, white has no ko threats at this point. ]
;B[hn];W[kq];B[lr];W[gn];B[do];W[co];B[hr]LB[ks:A]C[instead of continuing the ko immediately, black plays here to reduce white's eyespace and to make the connection at A possible.]
;W[im]LB[ir:A]C[this makes the ko lighter for white, so when he plays at A later it will be a one-sided ko]
;B[hk];W[ik];B[jl];W[il];B[ks];W[hj];B[gj];W[gi];B[fj];W[ij];B[gd];W[gc];B[hd];W[kj]
;B[fd];W[ed];B[hc];W[bd];B[oc]C[at this point, white has about 40 points; almost 15 in the upper left, more than 15 in  the lower left and about 10 on the lower right.

black's upper right corner is close to 20 and he has some potential for more on the upper side; in the lower side, it looks like black has about 20 points...]
;W[kr]C[white starts a fight on the lower side, which now makes the amount of black's territory there uncertain, potentially upsetting the balance of territory]
;B[is];W[lp];B[kp];W[mp];B[nq];W[np]LB[oq:A][nm:B]C[white hopes to force black A before moving out with white B]
;B[jq]C[black plays this squueze in preparation for surrounding white from above (see var)]
(;W[oq]C[since white cannot answer the atari (see prev var), he changes his plan and breaks into the lower right area]
;B[op];W[mq];B[jr];W[nr]LB[pr:A][rr:B][mr:C]C[white can live with A, making miai of B and C]
;B[pk]C[since black's group is also weak, he has to move out into the center now]
;W[nm];B[ol];W[ri];B[mk];W[pr]C[now white's alive on the lower side and has erased black's lower side and now has a clear territorial lead. The game now hinges on how well black can attack the center group.]
;B[kg]LB[li:A]C[black's intention here seems to be to make a large territory on the upper side while allowing white's center group to live. I'd probably play the more severe move at A, attacking white more directly.]
;W[hh];B[fh];W[mi];B[oi];W[oh];B[li]C[now black seems to be more serious about a severe attack on white's center group]
;W[lj];B[mj];W[lh];B[ki];W[kh];B[ji];W[jh];B[mh];W[ii];B[ni];W[lg];B[ig];W[ih];B[qr]
LB[rq:A]C[black has to go for the kill (of the center white group), because he's too far behind on territory, so B115 is sente against the white group in the lower leftand creates a second eye for black at A]
;W[mr];B[fb]C[Although locally this loses points, black is strengthening his position for the attack on the center white group]
;W[gb];B[hb];W[eb];B[gh]C[white's center group has no eyes at this point];W[kf]
;B[jg];W[hg];B[je];W[gf]C[meanwhile, white has his own plans to counter-attack, and these forcing moves set up the impending attack]
;B[ie];W[eg]C[this cuts black into two groups on the left side];B[gg];W[fg]LB[hf:A]
[fi:B]C[if black cuts at A, white can push through at B to escape the center group]
;B[eh];W[hf];B[ff];W[dg]C[black can't capture this group; see var]
(;B[ci];W[bh];B[fe];W[df]LB[hn:A]C[this move locally kills the black leftside group; so black now has to win the ko at A to save the group]
;B[hn];W[ld]C[this attacks black's upper side group while strengthening his center stones, which still need eyes]
;B[lb];W[gn];B[ek]C[this threatens to live on the left side; in fact, because this ko fight involves the lives of black's leftside and white's center group, all of the ko threats will involve these two groups.]
;W[fl];B[hn];W[mg];B[ng];W[gn];B[bi];W[ck];B[hn];W[mb];B[lc];W[gn];B[de];W[ce];B[hn]
;W[mc];B[kd];W[gn];B[bl];W[cl];B[hn];W[nh];B[dm];W[dn];B[mi];W[gn];B[qk]C[white probably doesn't have to answer this ko threat, because capturing the leftside black group would be big enough. But most likely he already sees a way to win, is probably in overtime, and doesn't want to have to recalculate]
;W[rk];B[hn];W[nf];B[og];W[gn];B[bk];W[md];B[hn]LB[cj:A]C[since black can now live if he plays at A, the ko is essentially finished now. ]
;W[of]LB[md:A]C[white now follows upon his move at A to make a living shape.];B[ph]
;W[pe];B[qd];W[ke]LB[kc:A][nc:B][ob:C][od:D]C[black resigns after W182; A is forced, and after white B, C and D are miai for white's second eye, and because black is so far behind in territory, the game is now hopeless for him.])
(;B[df];W[bh]LB[ag:A][ck:B]C[white's stones are safe, as A and B are miai]))
(;W[jr];B[ir];W[jp];B[js];W[jq];B[mn];W[mq];B[mr];W[nr];B[oq]C[white collapses]))
(;B[cc];W[cd];B[dc];W[ed];B[bd];W[be];B[bc];W[ce];B[fc];W[ge]C[this variation gives white a nice moyo on the left side]))
(;B[dm];W[dn];B[fm];W[op];B[pp];W[lo];B[jp];W[jo];B[io];W[jn];B[kp];W[mp]))
(;W[op];B[pp];W[lo];B[cq];W[dq];B[dr];W[cp];B[br];W[bq];B[cr];W[ck]C[Reducing black's framework immediately with 1 and 3 is also seen a lot in pro games. ]))