From: jzy@casbah.acns.nwu.edu (Jim Yu)
Subject: Dang Hu Games: Game 8
Organization: Northwestern University, Evanston Illinois.
Date: Thu, 13 Aug 1992 18:49:12 GMT

Hi everyone!

Game 8, and two more to go. :-)

This game is dedicated to our dearest *UFO 30k*, probably/perhaps/maybe the
"strongest 30k" in the solar system (he once claimed to be from Mars :-).

That's not all about UFO; he's one of the most special because he was the
organizer of IGSWCT '92.  The tournament offered a great chance for players
to meet some opponents never faced before, and thus to make more friends on
IGS, so it was probably one of the most precious experience for many of the
participants.  But this would have been impossible without our
"UnForgettable Orginizer."

Fact: IGSWCT '92 had a total of over 300 games, while an NFL (pro football)
regular season consists only 224 games. :)

Nice job, UFO!

jzy, NR ^_^

------------------------8<------------------>8-----------------------------

(
;
EVent[Dang Hu Games: Game 8]
PlayerBlack[Shi Xiang-Xia]
PlayerWhite[Fan Xi-Ping]
DaTe[1739]
PlaCe[Dang Hu, China]
GaMe[1]
VieW[]
SiZe[19]
GameName[]
REsult[W+13]
KoMi[-2]
Comment[Game 8

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[kq]
;
White[fq]
;
Black[cm]
;
White[nc]
;
Black[oe]
Comment[When to play P15 and when to play Q14?  This is rather a difficult question.  Fan's later work showed that if B plays Q14 here, W will be able to get P9 point.  Probably for this reason, B \(Shi\) decided to play P15. \(Nowadays, however, P15 is seldom seen, for most modern playes don't like W to get in the corner with R17.\)]
;
White[jc]
Comment[K17 is a key point, nothing wrong with it.  Also, ancient players were never hasty to enter the corner because they preferred to "leave some aji."]
;
Black[qh]
Comment[Certainly.]
;
White[qg]
Comment[Heavy.  Fan \(W\) later said, "Casual." \(Editor: it seems all the "casual" moves in Dang Hu Games were belonged to Fan. :-\) W should play P14, then after B O14, W Q14, good.]
;
Black[rh]
Comment[Normally B would play Q12 instead.  S12 can be also considered...]
;
White[og]
;
Black[ph]
Comment[...but Q12 now is questionable.  B should play N15, Fan later pointed out, and when W Q12, B S15.]
;
White[of]
;
Black[me]
Comment[Again inappropriate.  Should be at O15.]
;
White[qd]
Comment[Two consecutive questionable moves by B, and W now has a great chance.]
;
Black[qc]
;
White[pe]
;
Black[od]
;
White[pc]
;
Black[rd]
;
White[qe]
;
Black[qb]
Comment[Lives the corner.  No other choice -- if B S16 played at P17, the loss of corner would be too big.]
;
White[ne]
;
Black[nd]
;
White[md]
;
Black[nf]
;
White[oc]
;
Black[ne]
;
White[ld]
;
Black[le]
;
White[pb]
;
Black[re]
;
White[rf]
;
Black[rb]
;
White[ng]
;
Black[ke]
;
White[ni]
Comment[W indeed catches B's mistakes, and with a series of good moves, W team comes out.  Meanwhile, B has unsettled teams on each side.  W has undoubtly taken the upper hand.]
;
Comment[B might be also thinking L17: after W L16, B K16.  Now B wishes W to play L18 but W would in fact counterattack at K15.]
Black[nk]
;
White[mk]
;
Comment[O8 would be B's move under normal circumstance.  Here B tries very hard to turn it around, but O10 is somewhat awkward.]
Black[nj]
;
White[mj]
;
Black[mi]
;
Comment[Facing B's challenge, W's replies are appropriate.]
White[lg]
;
Black[li]
;
White[oi]
;
Black[nl]
;
White[jg]
;
Black[jf]
;
White[ml]
;
Black[nm]
;
Comment[Urgent.  K16 prevents B L17.]
White[jd]
;
Black[ig]
;
White[jh]
;
Black[hf]
;
Comment[W captures B two stones, and B's challenge has failed.]
White[kj]
;
Comment[Key point.  It connects B team at right, and at the same time, it extends B's moyo at the left.]
Black[ef]
;
Comment[W E9 would be a move that will take away a target to attack from B, thus making it difficult for B to win.  But such an "unhurried" move doesn't seem to fit their "taste." Now S9 attacks; sharp.]
White[rk]
;
Comment[No way for B to give in here.  Otherwise the whole B right team would be "floating."]
Black[rl]
;
White[ql]
;
Black[rm]
;
White[rn]
;
Black[rj]
;
White[pk]
;
Black[qj]
;
Comment[W strengthens his lower right corner, and B four stones are cut down.  W's fighting beginning with S9 is fruitful.]
White[qn]
;
Comment[B hopes to build a huge territory at the left by attacking W F3 stone.  Only way for B to win.]
Black[eq]
;
Comment[F4 would be simpler -- after B E6 and W J3, when B E9 to attack W D9 stone, W has N3 and W's moyo at the bottom looks even bigger than B's moyo at the left.]
White[fr]
;
Comment[Now B gets this key point \(H3\).  Although W is still better, but it has become complicated.]
Black[hq]
;
White[fo]
;
Black[en]
;
White[er]
;
Black[dr]
;
Comment[W E2 and C2 to leave some aji at the corner, then F6; good order.]
White[cr]
;
Black[ds]
;
White[fn]
;
Black[fm]
;
White[gm]
;
Black[fl]
;
White[gl]
;
Comment[B F7 and G9 try to fence a territory as big as possible.]
Black[gk]
;
White[fk]
;
Black[dm]
;
White[do]
;
Black[eo]
;
Comment[W D5 is a technique.  After B E5, then F4.  This way, W leaves a good chance to live the corner.]
White[fp]
;
Black[hk]
;
White[il]
;
Comment[Leaving the bottom B stones in danger, B is showing his determination to win by struggle.]
Black[hi]
;
Comment[Very big.]
White[mq]
;
Comment[It's actually not difficult for B to live here.  For example, B J5, W J7, and B M5 will probably do it \(especially when lower right W corner is not solid\).  However B doesn't what to lose sente to W, who in turn might do some damage at lower left corner.]
Black[mp]
;
White[np]
;
Comment[B just tries to create a complicated fight which might help him to win.]
Black[kl]
;
Comment[Good move -- "one stone hits two birds."  On one hand it prevents B H8 cut, on the other hand it continues to threaten bottom B stones.]
White[jn]
;
Comment[If M10, W N5 and it would be hard for B to settle both top and bottom.]
Black[hl]
;
White[hm]
;
Comment[Tries to settle the bottom team.]
Black[ho]
;
Comment[Common play against H5.  W is waiting for B H4, then W H6...]
White[ip]
;
Black[io]
;
White[jo]
;
Comment[...but B applies strong counterattack.  And now W can't play J3, but has to play H6.  In other words, W J4 didn't work and should be skipped -- W should have played H6 directly.  J4 almost cost W the game.]
Black[jp]
;
White[hn]
;
Black[ko]
;
White[kn]
;
Comment[Now B has a good shape.]
Black[mo]
;
White[cp]
;
Comment[After this W C4 and B E4 exchange, W's next move is very difficult.  W O3 seems to be the correct move, but after B M6, W M7 and B N7, B gets either M10 or J6.  Another choice for W is M5, but B woudl then cut at O3.]
Black[ep]
;
Comment[W finally decides to abandon all the other variations \(Editor: unfortunately I didn't include all of them here\) and plays N6.]
White[mn]
;
Comment[Sharp and powerful, catching B's weakness in time.  A normal feeling for B here is to play O5 instead, but O5 wouldn't do any good for B here.]
Black[ln]
;
White[lm]
;
Black[lo]
;
White[no]
;
Black[mm]
;
White[kp]
;
Black[lp]
;
White[lq]
;
Black[nn]
;
White[jq]
;
Black[kp]
;
White[kr]
;
Comment[To here every move seems certain.  Although W makes an ugly shape out of B stones, his own stones have weakness everywhere.]
Black[mn]
;
White[ik]
;
Black[ij]
;
Comment[Prevents B J6; no choice.]
White[hp]
;
Comment[Too greedy!  B doesn't want W to settle cleanly with just one move \(H4\), but B M10 would be as big as K2.  And W's only move against M10 would be K2.  Then B has K7 and L7, and K10 is yet another sente \(W has to play Q10\).  This way, W would be winning.]
Black[jr]
;
White[cq]
;
Black[dq]
;
Comment[W lives the corner in sente.]
White[bo]
;
Black[bl]
;
White[jj]
;
Comment[Since W F10 is sente, B has to play J12.]
Black[ih]
;
Comment[W thus fixed his weakness.  B K2 probably cost him the only chance to win.  Worst yet, B hasn't got sente.]
White[lj]
;
Black[gp]
;
White[in]
Comment[W could have skipped this move to play somewhere else, but he doesn't want B to get 2 points here in sente -- not giving up even inches.]
;
Black[po]
;
White[op]
;
Black[or]
Comment[B Q5 and P2 try hard to get sente.  Now, for example, if W plays Q2 next, B can play another place right away since B O6 group can live.  If W plays O2 next, after B R5 and W R4, B can again skip a move here since B has a way to connect with S7 stones.]
;
White[sm]
Comment[W believes B would have to play T9 here.  After than, whenever B skips a move, W can kill B O6 group.  However B can in fact skip T9 since B has \(after W T8\) P10 and Q11 sente to live right group.  Fortunately for W, this miscalculation will not hurt him.]
;
Black[qq]
Comment[Seems incomprehensible.  Normally should cut at O3, but W O2 would be a good move, and B still doesn't get the sente.  Now R3 is hoping W to play R4, then B O3 would get the sente.]
;
White[nr]
Comment[But W has a strong move in O2.]
;
Black[qp]
;
White[qo]
;
Black[pq]
;
White[on]
;
Black[oq]
;
White[nq]
;
Black[iq]
Comment[To here, B paid about 10 points \(losing Q5 and yielding T7 to W\) at the right to get a corner that is yet clean \(W still has S2\).  More importantly, B is still gote.  So the conclusion \(by Chen 9p\) is that B failed in this fight at lower right quadrant.

\(Editor: This fight from W #93 to B #150 is the most complex and most difficult fight in all Dang Hu Games.  When Chen 9p made the above conclusion, he was not very confident.  "Save for later people to study further," he also said.\)]
;
Comment[With this sente, W starts actions toward B's "headquarter" -- B's left moyo.]
White[ie]
;
Black[if]
;
White[fj]
;
Black[bj]
;
White[ci]
;
Black[bi]
;
White[gi]
;
Black[hj]
;
Comment[W's long waited move.]
White[ff]
;
Comment[Only move.  B can't play F15.]
Black[fg]
;
Comment[Good move.]
White[gg]
;
Comment[No choice.  If B F15 instead, after \(W first\) G14, G15, E13, F12, G12, E15, and D12, W has two eyes for sure.]
Black[gf]
;
White[fe]
;
Black[eg]
;
White[gh]
;
Comment[B again has no choice.  If B G16 instead, W has G15.  B might eventually get the corner, but his big team \(J14\) would be in danger due to lack of liberties.]
Black[hd]
;
White[gd]
;
Black[he]
;
Comment[Good timing test.  If B answers with B12, W can either live inside with sente or create numerous ko threats -- thus guarantees the living of W lower left corner -- plus, W T8 would kill B right.]
White[ch]
;
Black[ei]
;
Comment[Good move.]
White[eh]
;
Black[fh]
;
White[fi]
;
Black[cj]
;
White[dj]
;
Black[dh]
;
White[di]
;
Comment[W's E12 shortened B's liberties, and B has to play E16 here.]
Black[ed]
;
Comment[W thus easily gets to play G17.]
White[gc]
;
Black[cg]
;
White[bh]
;
Black[bk]
;
Comment[W is now clearly winning.]
White[hc]
;
Black[ee]
;
White[ec]
;
Black[id]
;
White[je]
;
Black[kf]
;
White[ic]
;
Black[bg]
;
White[ah]
;
Black[dc]
;
Comment[If W plays D9 instead, then it's a seki between W D9 group and B J14 group.  Now W T8 kills B right, which has about the same value \(as seki\).]
White[sl]
;
Black[dk]
;
White[db]
;
Black[cc]
;
White[cb]
;
Black[bc]
;
White[se]
;
Black[sc]
;
White[ge]
;
Black[ag]
;
White[ej]
;
Black[eh]
;
White[bb]
;
Black[ab]
;
White[kd]
;
Black[ai]
;
White[bq]
;
Black[rp]
;
White[lr]
;
Black[bn]
;
White[mf]
;
Black[hh]
;
White[kg]
;
Black[hg]
;
White[hr]
;
Black[ir]
;
White[el]
;
Black[em]
;
White[lf]
;
Black[cl]
;
Comment[White wins by 6.5 zi \(13 points\).]
White[gr]
)