(;GM[1]FF[4]SZ[19]AP[SmartGo:2.8.3.0]CA[shift_jis]
GN[2012.12.16_SAWMG_Redmond-Sun_Exo]
PW[Michael Redmond]WR[9P]
PB[Naijing Sun]BR[6D]
EV[Exhibition Game]
DT[12-16-2012]
RE[W+R]
AN[Michael Redmond 9P]
C[Exhibition Game
W: Michael Redmond 9P
B: Naijing Sun 6DSun, an amateur 6-dan, played very strongly in this limited-time exhibition game; his play in the opening was professional level and he showed great fighting spirit.]
MU[1];B[qd];W[dd];B[pq];W[dq]
C[A black play at B (F17; see var) is closer to what we're seeing in professional tournaments these days, and leads to a miniature Chinese opening]
(;B[cf]
C[however, playing inside white's left side has also been played in recent years]
;W[fc];B[co];W[oc];B[kd]LB[po:A][fq:B]
C[I prefer switching to A or B];W[po];B[qo];W[qn];B[qp];W[cj]
C[white wants to complicate the game, as complications will improve my chances to attack on the left side]
;B[cd];W[cc];B[bc];W[ce];B[bd];W[de]
C[black can also connect at B (see var)]
(;B[dc];W[cb];B[db];W[bb];B[ab];W[be];B[ca];W[cp];B[do];W[ep];B[cl];W[ek]
C[black can make a life so this cannot be called a severe attack, but it enables white to strengthen his lower left corner and build thickness towards the upper side]
;B[el];W[fl];B[bj];W[bi];B[ci]
C[the cut is a tesuji; if white resists (see var), it doesn't work out ]
(;W[dj]
C[black would like to take w36 but it will end up damaging his lower left side group too much; see var]
(;B[bk];W[ch]
C[this isn't a ladder, but if black tries to run away, white can capture the black stones (see var)]
(;B[em]
C[black settles his group];W[pe];B[qe];W[pf];B[qg];W[qc]
C[see the variation for the joseki sequence that starts with B (Q13)]
(;B[pd];W[od];B[pc];W[qf]
C[the variation at B (S14) depends on the ladder, which is good for white in this case; see var]
(;B[ob]
C[if white answers at B, black will be able to connect on the right side]
(;W[re]LB[qb:A][mc:B]
C[If black A, white B];B[rd];W[nb];B[pb];W[ne]LB[pn:A]
C[I prefer switching to A at this point];B[mb];W[lc];B[nc];W[mc];B[na];W[le]
;B[fk];W[gl]
C[it's not a good idea for black to try to move out into the center with B (F10, see var), as white is strong in the area, so black goes for a trade instead ]
(;B[ej];W[dk];B[di];W[ei];B[dh];W[fj];B[bh];W[pn];B[rg]LB[nq:A]
C[I prefer to play at A; white will have a hard time surrounding the whole right-side/center moyo with one move ]
;W[rf];B[pj];W[nj];B[oh];W[nh];B[pl];W[oq];B[or]
C[the joseki move at B (q4) is weak in this case, because it doesn't put pressure on black's corner group and white cannot make efficient use of his wall (see var)]
(;W[nr]
C[if black cuts at B (O3; see var), white will capture the corner]
(;B[op];W[nq];B[pp];W[nn]LB[rn:A]
C[the corner is alive at this point, but a descent at A would attack both the corner and side groups]
;B[rl];W[rm];B[nl];W[ok];B[ol];W[qk];B[ql];W[pk];B[np];W[ln];B[ll]
C[white's group is vulnerable to wedges at n6 and p6, so I don't have time to play on the lower side (see var)]
(;W[mm];B[rj]LB[rk:A]
C[B99 is a big territorial move (compared to allowing white to block at A), and it begins to make an eye on the side]
;W[rk];B[sk];W[qj];B[ri];W[lq]
C[a big territorial move that also increases pressure on the corner group]
;B[mo];W[lm];B[kl];W[lj];B[kj];W[jn];B[nk];W[oj];B[lk];W[li];B[jk]
C[white can get a ko against either the corner or to cut off black's right-side group; (see var)]
(;W[ji]
C[although black's eye on the right is not perfect, and he doesn't yet have an eye in the center, black's center group is not in serious danger yet. white can be satisfied with surrounding the lower side while attacking]
;B[jm];W[in]
C[if black plays at B (J7, see var), he'll be able to live relatively easily but because he's behind he wants to play more actively.

White effectively has a 15-point lead now: black has about 35 points, and when white finishes sealing off the bottom territory he'll have about 40 points on the lower side, plus he can also expect to make more points attacking black's center group]
(;B[ii]
C[this looks like an overplay -- and in fact it is -- but black must continue to play as actively as possible to have any chance of staying in the game ]
;W[jj]
C[covering at B doesn't work for black; see var]
(;B[hk];W[ij];B[hl];W[gk];B[hj];W[eh];B[dg];W[hi];B[gi];W[ih];B[hh];W[gn]
;B[ii];W[jh];B[eg];W[fh];B[gh];W[fg];B[hf];W[hd];B[hm];W[fo]
C[white secures the lower side territory, and now has a 15-point lead, plus thickness on the upper side that will yield more points. meanwhile, black has two gote eyes, so he's still struggling just to survive.]
;B[ge];W[ff];B[id];W[ic];B[gc];W[gd];B[fe];W[fd];B[im];W[lo];B[km]
C[black makes an eye in the center but the eye on the right side is not complete]
;W[ro];B[rp];W[if]LB[sp:A][sg:B]
C[white could start the ko by playing at A, or go for the kill by attacking black's eye-shape, starting with a play at B. But white is comfortably ahead on points,and the only way things could go wrong would be if something happened to threaten white's center group. So W156 protects against any danger and also makes points in the center, giving me a 25-point lead.]
;B[he];W[ie];B[bo]LB[qi:A]
C[instead of trying to live at A, black prefers to go down fighting, taking the big territorial move and daring white to try to kill his big center group]
;W[sg]
C[white takes up the challenge];B[sh];W[sj];B[sl];W[qh];B[qi];W[ph];B[pg]
;W[og];B[sf];W[se]
C[black has no eye on the side now, but he's not quite dead...];B[ee];W[ef]
;B[ed]
C[if white tries to capture the whole black group by cutting at B (E17), it leads to a dangerous semeai for white]
(;W[df];B[ec];W[cg]
C[black escapes, but the capture of the left-hand side is the final nail in the coffin, as white is now about 50 points ahead. ]
;B[jd];W[jb];B[kb];W[kc];B[jc];W[ib];B[fb];W[hc];B[nd];W[oe];B[lb];W[ld]
C[black resigns])
(;W[ec];B[ig];W[jg];B[hg];W[df];B[jd];W[ke];B[gb];W[hc];B[jb]))
(;B[ij];W[ik];B[ki];W[jh];B[kh];W[kg];B[jg];W[ih];B[lg];W[kf];B[lh];W[ph]
C[even if black lives, he's lost too much in the center]))
(;B[im];W[hn];B[hk];W[gk];B[jj];W[pr];B[qr];W[os];B[rq]
C[the territories are balanced now but white will make points from his thickness and black has no place to make extra territory]
))
(;W[ro];B[rp];W[sp]
(;B[sq];W[sn]LB[sl:A][rq:B]
C[sets up ko at either A or B])
(;B[rq];W[qr];B[pr];W[os];B[ps];W[rr];B[sr];W[qs]
C[ko])
(;B[rr];W[qr]
(;B[pr];W[sr]
C[dead])
(;B[sq];W[pr];B[so];W[rn];B[qq];W[rs];B[ss]
C[ko]))))
(;W[lq];B[on];W[oo];B[no];W[om];B[mn];W[mm];B[mo];W[nm];B[lm]))
(;B[nq];W[op];B[mr];W[pr];B[ns];W[qq];B[np];W[pp]))
(;W[pp];B[qr];W[nq];B[nr];W[mq];B[nk]))
(;B[fj];W[di];B[hj];W[fn]LB[bo:A]
C[a white play at A is now forcing for white]))
(;W[nb];B[pb]
(;W[mc];B[rf])
(;W[rf];B[nc])))
(;B[rf];W[rg];B[re];W[qh]
C[if the ladder favors white, it's good for white];B[oe];W[ne]
(;B[pg];W[of];B[rh];W[oh]
C[white's thickness is too good])
(;B[of];W[pg];B[nf];W[me]
C[too good for white, who gets good positions on both sides])))
(;B[pg];W[pd];B[ng];W[qf];B[rf];W[rc]))
(;B[di];W[ei];B[dh];W[eh];B[dg];W[bg]))
(;B[bh];W[bk];B[ai];W[ck]))
(;W[di];B[ch];W[bk];B[dj];W[ck];B[dk];W[ej];B[dl];W[bh];B[bl];W[aj];B[ei]
;W[dh];B[fk];W[fj];B[gk]))
(;B[be];W[cb];B[ch]))
(;B[fc];W[cf];B[lc]))

