(;GM[1]FF[4]SZ[19]AP[SmartGo:2.5.0.0]CA[UTF-8]
GN[2011 US Open Round 4 Board 3 - Zhaonian Chen 7d (w) vs Calvin Sun 7d (b)]
PW[Zhaonian Chen]WR[7d]
PB[Calvin Sun]BR[7d]
EV[2011 US Open]RO[4]
DT[2011-08-04]
PC[The KGS Go Server at http://www.gokgs.com/]
KM[7.5]
US[Richard Dolen]
RU[AGA]ST[2]
TM[7200.0]OT[5x30 byo-yomi]
AN[Michael Redmond ]
C[2011 US Open 
Round 4, Board 3
August 4, 2011
W: Zhaonian Chen 7d 
B: Calvin Sun 7d 
Game Commentary by Michael Redmond 9P
Game recorded by Richard Dolen
Commentary transcribed by Chris Garlock

USGO5 [-\]: Welcome to Michael Redmond's game commentary
]
;B[pd];W[dd]
C[syl6 [6k\]: are you using mic
];B[dq];W[qp];B[cf];W[fc]LB[ck:A][oq:B]
C[USGO5 [-\]: A or B might be more usual
];B[bd]
C[USGO5 [-\]: this is a solid move; a relatively peaceful game
];W[cc];B[ci]
;W[oq];B[qk];W[qf];B[qh]LB[nc:C][qe:A][pf:B]
C[USGO5 [-\]: B had a choice to play bA,wB, bC
USGO5 [-\]: but the pincer is playable too
]
;W[qc];B[qd];W[pc];B[od];W[rd];B[re];W[rc];B[qe];W[nc];B[jq]LB[do:A]
C[USGO5 [-\]: the ext is miaia with the left side
USGO5 [-\]: anothe option is for b to play A
]
;W[do];B[dm];W[fo];B[gq];W[cq];B[cr];W[eq]
(;B[er]
C[USGO5 [-\]: this is too submissive
];W[dp];B[dr];W[fq];B[fr];W[gp];B[ep]
;W[fp];B[hq]
C[USGO5 [-\]: problem is that B is low and w -- which shd have had a weak group, is close to having eyes
USGO5 [-\]: now it's w's turn to mess up
]
(;W[ck]
C[USGO5 [-\]: this is an overplay
];B[en];W[eo];B[cn]
C[USGO5 [-\]: this is the correct counter-attack
];W[bo];B[bq];W[co];B[cl]
C[USGO5 [-\]: w'a already in trouble
];W[dk];B[gn];W[bm]
C[USGO5 [-\]: w's trying to make an extra eye or connect underneath but it's already a desperate tactic
]
;B[bl];W[bk]
(;B[bn];W[an]
(;B[cm]
C[USGO5 [-\]: the result is that w has a potential ko to connect; the position is still diff for w but it's a slight improvement
]
;W[fn];B[fm];W[gm];B[fl];W[gl];B[fk];W[gk];B[ej];W[hn];B[me];W[ch];B[bh]
;W[fj];B[fi];W[gj];B[ek];W[qm];B[qq];W[pq];B[ok];W[al];B[am];W[rk];B[ao]
;W[qj];B[pj];W[qi];B[pi];W[ql];B[pk];W[rh];B[rg];W[ri];B[mc];W[nb];B[hc]
;W[ph];B[qg];W[pg];B[rf];W[nh];B[mi];W[mh];B[li];W[lh];B[kh];W[kg];B[ki]
;W[jg];B[lf];W[lg];B[kc];W[nd];B[pf];W[md];B[ld];W[ke];B[le];W[he];B[ii]
;W[ib];B[ic];W[hb];B[gc];W[gb];B[gd];W[hh];B[hi];W[gi];B[gh];W[ne];B[nf]
;W[fe];B[ge];W[gf];B[fh];W[ef];B[oe];W[nl];B[hg];W[hf];B[ll];W[mk];B[nj]
;W[lk];B[jl];W[kl];B[km];W[kk];B[jk];W[jj];B[jn];W[im];B[jm];W[ih];B[ij]
;W[io];B[kj];W[nn];B[in];W[hp];B[mq];W[jc];B[jd];W[jb];B[je];W[gg];B[nr]
;W[or];B[np];W[po];B[bc];W[di];B[dg];W[dh];B[cg];W[bi];B[bg];W[eg];B[eh]
;W[dj];B[ei];W[ak];B[ai];W[ap];B[an];W[cj];B[aj];W[em];B[el];W[bp];B[ah]
;W[dn];B[em];W[kf];B[kd];W[id];B[ie];W[hd];B[cb];W[db];B[cd];W[dc];B[oc]
;W[ob];B[mb];W[jo];B[ko];W[iq];B[ir];W[kp];B[jp];W[lo];B[kn];W[ip];B[kr]
;W[mo];B[il];W[hm];B[mp];W[lp];B[no];W[mm];B[lm];W[on];B[oi];W[ng];B[na]
;W[pb];B[mf];W[hk];B[ik];W[nk];B[ni];W[bb]
C[USGO5 [-\]: the fact that b got a ko later on the left side was one of the resons he was able to get back in the game
USGO5 [-\]: thanks for watching this commentary by Michael Redmond!
Burton [6k\]: thanks from all of us
QualityDr [10k?\]: Thanks! Enjoyed it. Very clear and instructive.
Zeitlupe30 [25k\]: thx
epion003 [?\]: thx
]
)
(;B[al];W[fn];B[fm];W[dn]TR[bn]
C[USGO5 [-\]: the push-through (marked) created damezumari
]))
(;B[am];W[an];B[al]LB[bp:A]
C[USGO5 [-\]: b can cut w off this way and tho w has a potential ko at A, that's just too painful
]
))
(;W[cm];B[cl];W[bm];B[en];W[eo]
(;B[dl];W[bq]
C[USGO5 [-\]: this would be easy for w
])
(;B[bq];W[dl];B[el];W[dk];B[ck]
C[USGO5 [-\]: b might try this
];W[dj];B[cj];W[di]
C[USGO5 [-\]: but this is prob still playable for w
])))
(;B[dp]
(;W[cp];B[ep];W[eo];B[er]
C[USGO5 [-\]: good for B
])
(;W[ep];B[cp]
C[USGO5 [-\]: also good for B
])))

