From: jzy@casbah.acns.nwu.edu (Jim Yu)
Subject: Dang Hu Games: Game 7
Organization: Northwestern University, Evanston Illinois.
Date: Wed, 12 Aug 1992 15:06:59 GMT

Hi everyone!

This is Game 7.  After tim and fmc, people on IGS are probably expecting
*tweet* next -- yes, this game is dedicated to *tweet*.  Who's tweet?  Let
me put it this way: tweet to IGS is like the Godfather to the Mafia. :-)
He was involved in the establishment of all three existing Go servers, so
it's not surprising that tweet knows everything on IGS.  And tweet knows
everything on IGS for one single reason -- he does his best to serve everyone.

Thank you, tweet. *bow* :)

jzy NR ^_^

P.S. I apologize that I have not mentioned a tiny yet important detail
about viewing these Dang Hu Games.  If you want to read the game, please
cut the part below the following line and save *that* part to some file and
view it with mgt.  If you include the part above the line in your mgt file,
you might run into some bugs, such as the setup stones might be skipped.

------------------------- 8< cut here >8 -----------------------------

(
;
EVent[Dang Hu Games: Game 7]
PlayerBlack[Shi Xiang-Xia]
PlayerWhite[Fan Xi-Ping]
DaTe[1739]
PlaCe[Dang Hu, China]
GaMe[1]
VieW[]
SiZe[19]
GameName[]
REsult[White+Resign]
KoMi[-2]
Comment[Game 7

White: Fan Xi-Ping

Black: Shi Xiang-Xia]
AddBlack[dp][pd]
AddWhite[dd][pp]
;
White[qf]
;
Black[qk]
;
White[qm]
;
Black[cf]
;
White[ck]
;
Black[nq]
;
White[fq]
;
Black[jq]
;
White[fo]
;
Black[cm]
;
White[of]
;
Black[mc]
;
White[lq]
Comment[Invasion to initiate a fight.  So far it's almost the same as Game 6, which was won by Shi \(played B too\).  It's understandable that Shi preferred the same openning, but Fan also decided to go with it -- he was of course prepared.  For example, an exchange of W P14 and B N17 \(more pressure on B R9\) before W M3.]
;
Black[no]
;
White[kp]
;
Black[jp]
;
White[kn]
;
Black[jo]
;
White[ko]
;
Black[im]
;
White[pr]
Comment[Another improvement by Fan.  In Game 6, Fan played P3 and lost advantage in the early going.]
;
Black[eq]
Comment[B does not play P2 but plays E3 instead, showing his aggressive attitude.  W Q2 hoped B to play P2 but failed, so later Fan improved this move once again: W would play Q2 right after W L4, then, without B K4, K5, and J7 stones, B is not strong enough to attack W left, so B would have to play P2 and W Q2 would get what he wants.]
;
White[er]
;
Black[dr]
;
White[fr]
Comment[Although W E2 and F2 were common plays, but not appropriate under this situation.  Fan, playing W, later preferred E2 and E4 \(not F2\) to gain outside thickness, while Shi preferred W H3 \(not E2\), B F2, and W G2.  Both disagreed with W's plays in this game.  Now B has sente.]
;
Black[en]
Comment[Attack, but somewhat "shallow."  B D9 would be good.  Then W C2 \(after B D9\) is good order, followed by B C3, a text move.  After that, \(W first\) D1, D3, F7, and C8.  Although B corner is hurt, he gains quite a bit at the left.]
;
White[fn]
;
Black[em]
;
White[fm]
;
Black[fl]
;
White[gl]
;
Black[gm]
Comment[Only move.]
;
White[cr]
Comment[Leave some aji at the corner; good timing.]
;
Black[ds]
;
White[el]
Comment[If atari at H7 instead, W would lose the outside potential.  Now E8, after B F9, W H7 would be a good order.]
;
Black[fk]
;
White[hm]
;
Black[hl]
;
White[gn]
;
Black[hk]
;
White[in]
;
Black[jn]
;
White[jm]
;
Black[il]
;
White[hr]
;
Black[km]
;
White[jl]
;
Black[jk]
;
White[kl]
;
Black[lm]
;
White[kk]
;
Black[mr]
Comment[If M2 instead, after W N2, B L3, and W M4, B N1 would be a good move to create a ko.  Unfortunately for B, W has G9 and later F10 to create several ko threats, and B can't win the ko.  So he chose N2 instead of M2.]
;
White[lr]
;
Black[ir]
;
White[hq]
;
Black[ln]
;
White[ks]
Comment[L1 is the key point of liberties.]
;
Black[js]
;
White[kq]
Comment[Ko.]
;
Black[io]
;
White[hn]
;
Black[ho]
;
White[go]
;
Black[ek]
Comment[B temporarily doesn't have enough ko threats, so it's necessary to defend here.  If not, W has E9, after B F10, W C6 is good move.]
;
White[iq]
;
Black[kr]
;
White[jr]
;
Black[ef]
;
White[gc]
;
Black[qq]
;
White[pq]
;
Black[qn]
Comment[B R3 adn R6 are clever moves, but wrong time!  B R3 should play L2.  Since B now has plenty of ko threats, B would be able to thicken his outside.  *Then* R6 would be much more powerful.]
;
White[pn]
;
Black[kr]
Comment[Already late.]
;
White[mq]
Comment[Good move.]
;
Black[or]
;
White[ms]
;
Black[nr]
;
White[hp]
Comment[To here, W not only "finishes" the ko, but also leave some weakness in B's shape.]
;
Black[pm]
;
White[om]
Comment[Atari at R5 instead would be a mediocre moe.  After \(B first\) S6, P7, Q8, and P6, when B N9, W would have to play L10, and B S5 would almost kill W corner.  Even if W would escape, there is no way for W to win.]
;
Black[pl]
;
White[on]
Comment[P7 and P6 are the only moves.]
;
Black[mk]
;
White[kj]
;
Black[ol]
Comment[P8 seems to be a text move, but it's almost the losing move.  B should play R5.  It \(R5\) doesn't just gain profit, but more importantly, it's directly related to the life/death of B's right.]
;
White[rn]
;
Black[qo]
;
Comment[W S6 and then R4 is a technique.]
White[qp]
;
Comment[No choice.  If S5, W would play S7 and B's liberties are one shorter.]
Black[rm]
;
Comment[W gets the corner, plus L10 "sticking out," B is hurt badly. Also, B's right is not clean.  W has turned it around.]
White[ro]
;
Comment[Important.  Otherwise W C3 and B5 can live the corner, and B's territory would be definitely short.]
Black[cl]
;
White[nm]
;
Black[ll]
;
Comment[If W O7 or this Q10 played at R11, W would be enough.  Now Q10 is a fierce attack!  W is really showing his attitude.]
White[pj]
;
Black[qj]
;
White[pi]
;
Black[qi]
;
Comment[W saves sentes at Q12, R12, and a cut at O8; R17 tests B's reaction, smart thinking and clever position.]
White[qc]
;
Black[qd]
;
White[pc]
;
Black[od]
;
White[ph]
;
Black[nl]
;
White[oc]
;
Comment[B S15 and later S13 are to settle B's big group.]
Black[re]
;
Comment[Calm.]
White[rc]
;
Black[rg]
;
White[rf]
;
Black[sf]
;
White[rh]
;
Black[qh]
;
Comment[Several W moves here perpare for coming O16.]
White[qg]
;
Black[sg]
;
White[nd]
;
Black[nc]
;
White[md]
;
Comment[B certainly wants to play M16, but W can cut at M17 since, if B M18, W has T12 and S16, then B R15 and W P15 is sente to prevent B's ladder.  After B S11, W L17.  B fails.  So M17 is a move when no other choice.]
Black[lc]
;
Comment[W thus gets this good point.]
White[jc]
;
Black[jd]
;
White[id]
;
Comment[Should play K15.  W would have to play N14, then B J15, W J17 and B M16; B goes out smoothly this way.]
Black[ld]
;
White[mf]
;
Black[lf]
;
White[rd]
;
Black[qe]
;
White[je]
;
Black[kd]
;
Comment[W K15 and J14 powerful.  Now B's left is thin.]
White[if]
;
Black[he]
;
White[ie]
;
Black[mg]
;
White[oe]
;
Black[ri]
;
White[ng]
;
Black[mh]
;
White[nh]
;
Black[mi]
;
White[me]
;
Comment[W lives.  Although B also connects, W has started to lead.]
Black[kf]
;
Comment[W invades with determination.  This is not just courage, but also percise calculations.]
White[dg]
;
Black[df]
;
Comment[W's way to live D13 is very smart.  First C3: it's not to live the corner, but to guarantee a sente at D9.]
White[cq]
;
Black[dq]
;
White[bo]
;
Black[cp]
;
White[bp]
;
Black[br]
;
White[bq]
;
Black[cs]
;
White[di]
;
Black[eh]
;
White[ei]
;
Black[fi]
;
White[dk]
;
Comment[Let's see why W D9 is sente: if B connects at E13 instead of D8, W D8 is sente to save get E8 back.  Then W has F10 \(B F9 three stones are to be cut at this moment\) and B can't kill W.]
Black[dl]
;
White[bh]
;
Black[bl]
;
White[dh]
;
Black[eg]
;
Comment[W lives in B's territory; great skills!  Note: later if B C13, W B10 is key point to live.  Then, \(B first\) E10, D10, C11, C12, A9, B13, B14, and A13, W lives.]
White[bk]
;
Comment[B's left is destroyed, but B gets E17 to somewhat gain back his loss.]
Black[ec]
;
White[ed]
;
Comment[Beautiful order.]
Black[hc]
;
White[hd]
;
Black[fc]
;
White[fd]
;
Black[gb]
;
White[gd]
;
Comment[To here, either D17 or J17, B gets one.  So like W's success at teh left, B's invasion is also successful.]
Black[hb]
;
Comment[Unnecessary.  There are not many ending game moves left, if W simply plays D17, D18 and then B16, he has won for sure.]
White[fh]
;
Black[gh]
;
White[dc]
;
Black[ic]
;
White[fg]
;
Black[gf]
;
White[gi]
;
Black[fj]
;
White[gg]
;
Black[hg]
;
White[hh]
;
Black[ff]
;
White[gh]
;
Black[ig]
;
White[ji]
;
Black[hf]
;
Comment[Again, W should simply protect upper left corner.  Now K13 makes things complicated again.]
White[jg]
;
Black[bg]
;
White[ci]
;
Black[cg]
;
White[bj]
;
Black[bd]
;
White[bc]
;
Comment[Good move.]
Black[bb]
;
Comment[If A17, B can make seki after \(B first\) J12, J11, C18, B15, D18, K12, and K14.  Then W would lose the game.]
White[cc]
;
Black[ih]
;
White[ii]
;
Black[jh]
;
White[kh]
;
Black[kg]
;
White[jf]
;
Black[ac]
;
White[be]
;
Black[af]
;
White[cd]
;
Comment[B D10 should throw in at L11, then W must capture L11.  The variation after that is extremely complicated.  If W is careful, he still wins, but a slight carelessness would cost W the game.  This is B's last chance and he missed it.]
Black[dj]
;
White[ej]
;
Black[ah]
;
White[ai]
;
Black[ch]
;
White[ag]
;
Black[hj]
;
White[hi]
;
Black[ah]
;
White[eo]
;
Black[do]
;
White[ag]
;
Black[ls]
;
Comment[W finishes the ko.]
White[ah]
;
Comment[Too late.]
Black[ki]
;
White[ip]
;
Black[lh]
;
White[jj]
;
Comment[Another ko, but the situation is already simple.]
Black[ae]
;
White[ad]
;
Black[jr]
;
White[hs]
;
Black[bd]
;
White[dn]
;
Black[cn]
;
White[ad]
;
Black[mp]
;
White[is]
;
Black[bd]
;
White[bs]
;
Black[as]
;
White[ad]
;
Black[pg]
;
White[pf]
;
Black[bd]
;
White[fb]
;
Black[eb]
;
White[ad]
;
Black[ps]
;
White[qr]
;
Black[bd]
;
White[db]
;
Black[fa]
;
White[ad]
;
Black[oi]
;
White[oh]
;
Black[bd]
;
White[ea]
;
Black[da]
;
White[ad]
;
Black[bf]
;
White[ca]
;
Black[ea]
;
Comment[W wins for sure.]
White[ab]
;
Black[ql]
;
White[nb]
;
Black[mb]
;
White[ob]
;
Black[ce]
;
White[bd]
;
Black[sn]
;
White[rp]
;
Black[qs]
;
White[rs]
;
Black[os]
;
White[rr]
;
Black[bn]
;
White[al]
;
Black[am]
;
White[ak]
;
Black[ik]
;
White[lo]
;
Black[mn]
;
White[ni]
;
Black[nj]
;
White[lj]
;
Black[oj]
;
White[mj]
;
Black[na]
;
White[sd]
;
Black[se]
;
White[oa]
;
Black[ma]
;
White[so]
;
Black[sm]
;
White[ep]
;
Black[es]
;
White[fs]
;
Black[co]
;
White[ok]
;
Black[nk]
;
White[pk]
;
Comment[White wins.

Overview: At the beginning, B's attack at the lower left was successful, thus B began to lead.  B's mistakes \(#70 and #86\), however, cost him the lead.  W played very well afterwards: #93 and #95's sharp attack, and #99's great thinking put W on the winning track.  Later, during W's invasion to B's left and B's invasion to W's top, both players showed tremendous skills.  A spectacular game indeed.]
Black[ns]
)