From: jzy@casbah.acns.nwu.edu (Jim Yu)
Newsgroups: rec.games.go
Subject: Dang Hu Games: Game 10 ('Final')
Date: 27 Aug 92 01:51:18 GMT
Organization: Northwestern University, Evanston Illinois.

Hi, everyone!

Here we go -- the final game of the Dang Hu Games.  This game actually
appeared in this same newsgroup before, posted by jansteen.  On first look
they looked like two different games, but a closer look told me that they
were the same game shown from two different angles.

Thus an idea stroke me; I would like to take this opportunity to post the
following question: Assume a Go game is highly asymmetric (which is the
case in almost all played Go games), how many outlooks a single game can
have?  That is, you can turn the Go board 90 degrees or 270 degrees, for
example, but you know that is the same game you're looking at.

Of course, the board has to be always upright standing on the screen of
your terminal; you can not turn the board by, say, 1 degree or 2 -- that
will be very uninteresting.

Simple, isn't it?  Well, that's what I have in mind.  After playing so
many hard games, I would like everyone to do some simple exercises like
this.  But, please, answer it!

So I can laugh at you . :)))))

Okay so I hope everyone to have some fun, and I certainly have not
forgotten my promise to dedicate every game to a person who has helped me
to learn and play Go.  This game, Game 10 of Dang Hu Games, is dedicated to
*eightk*, who is not an 8 kyu. :)

He taught me Go.

jzy 2k ^_^

------------------8<------- CUT HERE -------->8------------------
(
;
EVent[Dang Hu Games: Game 10]
PlayerBlack[Shi Xiang-Xia]
PlayerWhite[Fan Xi-Ping]
DaTe[1739]
PlaCe[Dang Hu, China]
GaMe[1]
VieW[]
SiZe[19]
GameName[]
REsult[B+5]
KoMi[-2]
AddBlack[dp][pd]
AddWhite[dd][pp]
Comment[Game 10

White: Fan Xi-Ping

Black: Shi Xiang-Xia]
;
White[qf]
;
Black[qk]
;
White[qm]
;
Black[cf]
;
White[ck]
;
Black[kq]
;
White[fq]
;
Black[cm]
;
White[iq]
;
Black[nq]
;
White[kc]
;
Black[ic]
;
White[gc]
;
Black[mc]
;
White[ch]
Comment[To here, it's a typical ancient openning.]
;
Black[ef]
;
White[fe]
;
Black[ff]
;
White[ce]
Comment[The order of W F15 and C15 doesn't look right; W C15 *then* F15 seems to be the correct order.  Now B can play B15 then D15, and later when B G15, W F16, B J14, and W L17 is isolated.  Had W played C15 first \(without W F15 and B F14 yet\), when B B15 and W B16, B would have to play B14 instead of a possible D15.]
;
Black[bf]
Comment[But B playes B14 here.  In other words, both players didn't think that there is anything wrong with the order of W F15 then C15.  Later, however, they changed their mind and started to adopt the "correct order" of W C15 then F15.]
;
White[gf]
;
Black[gg]
;
Comment[Thin.  H15 would be thick.  Now B has ways to invade W corner.]
White[hf]
;
Black[be]
;
White[bd]
;
Black[bc]
;
White[ad]
;
Black[hg]
;
Comment[Too strong.  W tries to emphasize F13 cut here, but W has weakness in his own stones.  Fan, playing W, abandoned this move in his later works.]
White[ig]
;
Comment[B counterattacks immediately.]
Black[if]
;
White[jf]
;
Black[ie]
;
White[ge]
;
Black[ed]
;
White[ee]
;
Comment[B E16 and D14, good.  Not only repair B's holes, but also leave stones at W's corner.]
Black[df]
;
Comment[It seems that W should play E17 to take care of one B stone, but to let B play K15 is unbearable.]
White[je]
;
Black[de]
;
Comment[No choice.  W can't give in a bit \(like to play D17\) here since B J14, J15 and J17 three stones are not completely captured.]
White[cd]
;
Black[jd]
;
White[kd]
;
Black[ec]
;
White[db]
;
Black[eb]
;
White[dc]
;
Comment[If B plays D19 now, it would be no good.  Without G18 first, when B D19, W would have G18 later.]
Black[gb]
;
Comment[Only move.  If H16 first, B simply J16.  Then when W H18, B F17 is good.  Thus B would create a ko, and W wouldn't have any ko threats while B has at least one in J12.]
White[hb]
;
Comment[Good timing.  Normally, W will have to get B19 now to live, but in this shape, B would have G16.]
Black[da]
;
Comment[So W has no choice but atari.]
PLayer[W]
White[ca]
;
Black[hc]
;
White[hd]
;
Black[fc]
;
White[id]
;
Comment[Thus B gets a great move in B19 after H17 and F17.  Without D19, this sequence might work too, but the result wouldn't be the best.]
Black[ba]
;
Comment[No choice.  If E19 instead, B can play G16 first, then C18, and W corner is killed.]
White[cb]
;
Black[gd]
;
White[he]
;
Black[bb]
;
White[ea]
;
Comment[Key.  If atari at F19, W A18 and it becomes a seki.]
Black[ac]
;
White[fa]
;
Black[ae]
;
White[ab]
;
Black[ib]
;
White[fd]
;
Black[fb]
;
Comment[Mistake.  Should play G17.  Althought B can create a ko no matter W plays G17 or K18, but with W G17, it would be a more difficult ko for B to win \(or an easier ko for W to win\).  Now with K18, W gives the ko advantage to B.  W K18 is a casual move.]
White[jb]
;
Comment[B gets an advantageous ko in hand, so B is clearly successful here.  However, W corner is not completely dead yet, plus B's upper right corner is still thin.  Therefore, it's still too early to judege that B's situation is optimistic.]
Black[ga]
;
Comment[W could also consider R17.  But that way, after exchanges at the corner, W wouldn't be able to take the advantage of W's thickness at the left.  Now W P14, hoping to attack B R9 by threatening B's upper right corner.]
White[of]
;
Comment[B's corner was already thin before W P14, so B should strengthen his corner here, it seems.  B R12 is rather unexpected, showing a great deal of toughness -- also showing his confidence to live the corner.  Indeed, W's invasion into the corner right now wouldn't be effective.]
Black[qh]
;
White[oq]
;
Black[np]
;
Comment[So W decides to give B R9 and R12 two stones some indirect pressure by strengthening his lower right.  If W can generate plenty of ko threats during the process, he can hope to gain by playing a ko with B at upper left.]
White[on]
;
Black[rd]
;
White[re]
;
Comment[B S16 was sente, and B is able to play P12.  Thus W loses apparent attacking targets.]
Black[oh]
;
White[rc]
;
Black[qc]
;
White[sd]
;
Black[qd]
;
Comment[Since it's hard for W to continue to attack, W G17 is to test B's response.]
White[gc]
;
Black[da]
;
White[ea]
;
Black[gd]
;
White[rb]
;
Black[qb]
;
White[gc]
;
Comment[B H19 would be steady and solid. O15 is to use offense as a defense, quite severe.  However it's very risky since now W can make the upper left a tight ko at anytime, and if B is to lose this ko, eh's lose territory worth nearly 60 points.  Why so risky? Apparently B isn't optimistic about the situation.]
Black[ne]
;
White[nf]
;
Black[mf]
;
Comment[A cool move to prevent a B cut at Q14.]
White[pg]
;
Black[le]
;
White[ph]
;
Black[pi]
;
White[oi]
;
Black[qi]
;
White[ni]
;
Black[gd]
;
White[md]
;
Black[ld]
;
White[gc]
;
Black[mg]
;
White[rg]
;
Black[ok]
;
Comment[Both sides struggle for the ko.  To here, W thinks it's time to make it a tight ko.]
White[ia]
;
Black[ha]
;
White[ja]
;
Black[gd]
;
White[nc]
;
Black[nd]
;
White[gc]
;
Comment[Should look for a ko threat at J14 instead.]
Black[nh]
;
Comment[Great move.  Obviously, W had foreseen this move when he played Q13 \(#91\).]
White[mh]
;
Comment[No choice.  If N11 atari, W can ignore it and finish the ko -- when B R13, W has P15 then R15 to live.]
Black[ng]
;
Comment[W could also consider G16 connect to finish the ko -- although that means to give up the upper right corner, W would gain sente to play G11 key point to attack.]
White[ra]
;
Black[gd]
;
White[lh]
;
Black[rh]
;
White[sg]
;
Black[fa]
;
White[mb]
;
Black[lc]
;
White[oc]
;
Black[pe]
;
White[qg]
;
Black[lb]
;
White[nb]
;
Black[kb]
;
White[gc]
;
Black[da]
;
White[qa]
;
Black[pb]
;
Comment[To here W damages B's eyeshape with some clever moves.]
White[pa]
;
Comment[Only key point to ensure an eye.]
Black[lg]
;
White[mj]
;
Black[kh]
;
Comment[W turns to attack B stones at the right.]
White[nl]
;
Black[rm]
;
White[rn]
;
Black[pm]
;
White[pn]
;
Black[ql]
;
White[qn]
;
Comment[To here B lives at the right, and the fight here comes to a pause.  B captures upper left, thus leads in territory.  But W has also gained: 1. Lower right; 2. Weakened three B stones at the bottom; 3. Upper right B team is not completely alive; 4. Upper left W team is not completely dead, providing numerous ko threats.]
Black[oj]
;
White[cn]
;
Comment[Not too good.  Normally against this type of "3-6 invasion" \(C6\), B should play C5.]
Black[dn]
;
White[co]
;
Black[dm]
;
White[do]
;
Black[eo]
;
White[bm]
;
Comment[Seems to be the absolute move, but it's in fact questionable here.  B could try B8 to isolate W C9 and C12 two stones.  That way, who's leading would be unclear.]
Black[eq]
;
White[fp]
;
Black[ep]
;
Comment[To here, W has greatly strengthened his two stones at the left, while B's corner is almost gone.  W is successful at this corner.]
White[bo]
;
Black[mk]
;
Comment[W tries to save five stones.  Wrong decision.  Should play C3 to get the corner and thus deprive the "root" from lower left B team.]
White[lj]
;
Black[ih]
;
White[jh]
;
Black[ji]
;
White[jg]
;
Black[nj]
;
White[mi]
;
Comment[These B moves are tight and strong.]
Black[kk]
;
White[lk]
;
Black[ll]
;
White[ml]
;
Black[kj]
;
White[nk]
;
Comment[To here, although W manages to save a few stones, B's middle is considerably thickened, thus the lower left weak B team gets a big help.  Moreover, the upper left "store of ko threats" for W has lost its value \(later when B takes D16 stones, W will have to play L15 to make an eye\), and B has P7 to threaten a cut.  B has turned it around to take the lead.]
Black[kg]
;
White[lm]
;
Black[kl]
;
White[jq]
;
Black[om]
;
White[nn]
;
Black[kp]
;
White[jo]
;
Comment[Nice.  Make it difficult for W to attack.]
Black[kn]
;
Comment[And W has to strengthen his own group; no choice.]
White[er]
;
Black[dr]
;
White[fr]
;
Comment[If B plays C4 to live the corner, it would be enough for him.  Now B O7 attempts to "win it faster."]
Black[nm]
;
Comment[If connect at N7 immediately, B has K4 first then N6 cut, and W wouldn't have a good answer to it.]
White[fn]
;
Black[fo]
;
White[go]
;
Comment[B F5 and G6 are too strong.  Should calmly connect at E6.]
Black[gn]
;
White[fm]
;
Black[ho]
;
White[gp]
;
Black[en]
;
Comment[B now has to live inside.  Quite a loss by B.]
White[el]
;
Black[cp]
;
White[bp]
;
Black[bq]
;
Comment[W C2 is to force B to make B A4 and W B8 exchange, thus to strengthen W's outside.]
White[cr]
;
Comment[Extremely good timing.]
Black[fl]
;
Comment[No choice.  If atari at G7, B has B2 to get more liberties at the corner first, then B D9.  At that time, B E7 cut would be severe.]
White[em]
;
Black[ap]
;
White[bl]
;
Black[ds]
;
White[cs]
;
Black[bs]
;
White[br]
;
Comment[Ko to live for B.]
Black[ar]
;
White[as]
;
Black[ao]
;
White[bn]
;
Black[bs]
;
White[mm]
;
Comment[W N7 saved a few stones, and B has to finish the ko here.]
Black[cq]
;
White[ko]
;
Black[lo]
;
White[ln]
;
Black[jp]
;
White[ip]
;
Black[mo]
;
White[km]
;
Black[jn]
;
White[io]
;
Black[jm]
;
White[jl]
;
Black[il]
;
White[im]
;
Black[jk]
;
White[in]
;
Black[jl]
;
White[mn]
;
Black[or]
;
White[pr]
;
Black[nr]
;
Comment[W gains at lower left.  B's loss here is due to a couple of too strong moves by him earlier.]
White[hl]
;
Black[hi]
;
White[kr]
;
Black[lr]
;
Comment[W is not careful.  Very likely another casual move by W \(Fan\).  W thinks that this will be a "worry-free" ko for him, but in fact he's short on ko threats.  W should play K2, and when later get the sente, W can play F9.  This way, it would be very close.]
White[ls]
;
Black[jr]
;
White[js]
;
Black[ks]
;
White[ol]
;
Black[pl]
;
White[kr]
;
Black[gd]
;
White[jc]
;
Black[ks]
;
White[sh]
;
Black[rj]
;
White[kr]
;
Black[cc]
;
White[ke]
;
Black[ks]
;
White[pj]
;
Black[pk]
;
White[kr]
;
Black[sf]
;
White[se]
;
Black[ks]
;
Comment[W loses half point here.]
White[oe]
;
Black[od]
;
White[kr]
;
Black[ps]
;
Comment[Here W loses 2 points.]
White[qr]
;
Black[ks]
;
White[rl]
;
Black[rk]
;
White[kr]
;
Black[sc]
;
White[sb]
;
Black[ks]
;
Comment[Another 2-point loss by W.]
White[sj]
;
Black[sl]
;
White[kr]
;
Comment[B decides to give in.  On surface W wins the ko, but the ko is worth only less than a point, while W has lost 4 plus points during the process.]
Black[ms]
;
White[ir]
;
Black[lq]
;
White[sn]
;
Black[sm]
;
White[si]
;
Black[sk]
;
White[ij]
;
Black[ii]
;
White[fi]
;
Black[fj]
;
White[gj]
;
Black[ek]
;
White[gl]
;
Black[fk]
;
White[dl]
;
Black[ei]
;
White[gi]
;
Black[gk]
;
White[hj]
;
Black[hk]
;
White[ik]
;
Black[jj]
;
White[ri]
;
Black[qj]
;
White[dk]
;
Black[ej]
;
Comment[Ko again.  The result is that W will lose a little bit, and at the end, W will lose the game by 5 points.]
White[ki]
;
Black[li]
;
White[mr]
;
Black[mq]
;
White[ki]
;
Black[hh]
;
White[fg]
;
Black[li]
;
White[fh]
;
Black[mk]
;
White[eh]
;
Black[bh]
;
White[bi]
;
Black[cg]
;
White[ci]
;
Black[qs]
;
White[rs]
;
Black[os]
;
White[rr]
;
Black[op]
;
White[pq]
;
Black[dh]
;
White[di]
;
Black[eg]
;
White[dg]
;
Black[ai]
;
White[aj]
;
Black[dh]
;
White[dj]
;
Black[ah]
;
White[gc]
;
Black[hb]
;
White[an]
;
Black[ks]
;
White[jr]
;
Black[es]
;
White[fs]
;
Black[oo]
;
White[po]
;
Black[qe]
;
White[rf]
;
Black[aq]
;
Comment[B wins by 2.5 zi \(5 points\).

Overview: In this game, the variations at upper left, upper right, and lower left three corners were interesting and spectacular.  A remarkable fact was that even W seemed to lose at the upper left, from a global point of view, W wasn't exactly lagging.  In other words, Fan and Shi had the ability to control the global situation over local details.  They once again lived up
with the title of "Great National Hands."]
White[kf]
)
Newsgroups: rec.games.go