From: olounela@klaava.Helsinki.FI (Olli Lounela)
Newsgroups: rec.games.go
Subject: Commented amateur game: 2 kyu vs. 8 kyu.
Date: 1 Sep 92 15:14:35 GMT
Organization: University of Helsinki


Hi everybody. 

This is a kind of test.  No, not to worry, I know already how this
posting thing works...  just about.  Just read on. 

Well, some people have probably noticed that I have commented a couple
of amateur games and arranged them to be archived at the go archive,
under names amgamesX.sh.Z in the appropriate directory. 

However, I now have persuaded myself to try and post a game straight
away into the net.  If this proves successfull, I'll continue the
practice, but the intervals may prove longish due to time problems.

The commentaries I do I try to aim for players above 10 kyu (well, I
have to put a limit somewhere; players below may find them useful) and
below dan level (who might find the commentaries amusing but perhaps not
instructive), and to ensure this I have several precommentators, who are
of the level of the players, and whose commentary I comment.  This
practise has led to more accurate targeting of commentaries and to much
more informative ones besides (correcting thoughts besides mistaeks :-). 

I welcome any and all comments about these games and all questions
besides, and will try to clarify if something seems unclear.

As to the games already archived, if somebody does not have access to
ftp and thus cannot obtain them, I can send them.  They are
amgames1.sh.Z and amgames2.sh.Z, both of which contain 10 commented
games.  The archive is ftp.u.washington.edu and the games reside in
/public/go/games (I think).  They are in mgt (sgf) format, compressed
with Unix compress and shar'ed. 

The game that follows has been played in the Lacerta Inet Go server, it
was _the_ server at the time, and the players are Tero Sand, 2 kyu, and
Klaus Sorensen, 8 kyu.  I use some Japanese terms, but these can also be
obtained from the archive, if not guessed.

(I sincerely hope that the newsreader I use can handle files of this
size, and that nothing else goes awry... :-)

Enjoy.

PS.  I'd like to express my gratefulness to the inventors and
implementors of the IGS (Lacerta, at the time), Tim Casey and Chris
Chisolm, and the creators of mgt program, Adrian Marino, Michael
Dobbins, and probably others I don't know, for making this very thing at
all possible.  And Adrian again for keeping the Go archive, and all the
others who have made anything of the kind, for excellent work in
spreading Go across Internet. 

(Well, enogh babbling.  Let's get on with it!)

	Olli, 3 dan
--
E-mail: olounela@cc.helsinki.fi           ! .sig still under construction.
Blame me only for any opinions expressed. !  Never you mind, I don't either.


-----klippeti-----klippeti-----klippeti-----klap-----

(;GM[1]VW[]SZ[19]AB[dd][pp][pd][dp][dj][pj]C[ A game from the Lacerta IGS.

 White: Tero Sand, 2 kyu
 6 stones: Klaus Sorensen, 8 kyu

 7 May 1992

 Comments by Mike Dobbins and
 Olli Lounela, 3 dan.];W[nc];L[pf]C[MD: I would play 'a' with the stone at Q10.

OL: This is true. The actual move is passive and would be better at 'a'.]B[qf];W[fc];B[fd]C[MD: Attack and extend not the best when there is a san-ren-sei \(D4,10,16\) configuration. I would play 'a' and give white the side.

OL: True enough. Also possible would be 'b'.

What is worng with the tsuke is that black is helping white to strengthen his position. Not recommended.]L[df][jd];W[gd];B[fe];L[ec][cc][cf][gc][fb][ge]C[OL: This is rather a strange move, and it looks bad. Cosider, for example, the strongest black move at 'a'. If then white 'b', black 'c' puts whito on the spot. Connecting at 'd' would be useless because of the hane at 'e'.

What I would do is push up to 'f' and be satisfied with getting a strong position while still leaving bad aji in the corner.]W[cd];B[ce];W[cc];B[ge]C[OL: This is a big mistaek. Now white is bound to get a good result.];W[be]C[OL: Connecting at 'a' is obligatory.]L[gc];B[gc]C[MD: Press white down with 'a' and build more center influence. Or defend with 'b'?  I don't like the shape 'b' will leave, black would be heavy in this corner.

OL: But actually this cut is the correct thing to do \(notwithstanding black's later mistaeks :-\).]L[hd][cf];W[hd];B[he]C[OL: Black must play at 'a', or his cut goes to waste. After that, whatever happens, black gets a good result.

Note, BTW, that there is the aji of 'b' to 'f' to capture the single white stone while leaving the corner looking forlorn.]L[hc][fb][ec][dc][eb][db];W[hc];C[MD: I don't see a good follow-up for black after playing G18.  I would play a big point here. 'a' seems to be the biggest point on the board.

OL: I find it more interesting to strengthen the group at the top left first.

A likely sequence is white 'b' to black 'e', which ends in black's sente. After that, black 'a' seems a very good move.]L[jp][fb][hb][ib][jd]B[gb];W[fb];B[cf]C[OL: Even if this is big, it's not urgent. Reinforcing in makeshift fashion would be better.];C[MD: Why not attack black somewhere else, isn't white alive in the corner as it stands.  The bottom of the board looks very open, to me.

OL: Right-o. This is much too small for now.]W[bf];B[ec]C[OL: This is downright bad. Mistaek in direction.

As the corner is alive anyway, there is no point in \(not\) separating it from the three stones, that make eyes in the process.

Note, BTW, that if black played at 'a' and white answered with something alse than 'b', black 'c' to 'e' \(or 'f' instead of 'e', I'm not sure which is better...\) proves most effective \(like either capturing the corner or the two marked stones\).]L[hb][ib][dc][db][cb][eb]M[fc][fb];W[eb];C[MD: a big point]B[jp];W[fq];B[eq]C[OL: Good. Black wants to attack, and making white heavy first is the correct approach.];W[fp];C[MD: This looks reasonable to me, although the C3 corner can still be invaded. If E3 were



 at D3 the corner could not be invaded.

OL: It *is* reasonable. Furthermore, it's a joseki.]B[dn];W[mp];M[fp][fq][mp]L[jn][lp][pn][cq]C[MD: I think this is the wrong direction.  'a' to keep good communication with the center. 'b' presses on the weak stone to get some space for black.  I probably would have played 'c' and worked with K4 later.

OL: H'm... this move clearly isn't good enough: it has only one thing in mind, attacking the two marked stones. As white still can invade at 'd', this attack is not as big as it might seem.

As to 'a', 'b' and 'c', 'b' is the worst, clearly white is hoping for something of the kind. He would live in the corner with 'd' at once and then build thickness against the bottom right corner -- this would be likely to end with white having as much territory as black. 'c' is good, but feels slack and 'a' is the move I'd play with little hesitation -- especially since the single marked stone is a bit far from the corner to attack severely.]B[hp];C[OL: Strange and slack. White probably has the intention o



f tricking, or of letting black to trick himself.]W[pm];B[on]C[OL: Good, this is the proper direction.];W[om];B[nn];W[ml];B[ln]C[OL: This feels slightly slack. Prssing at 'a' is certainly much more effective, and besides makes a bit better connection.

However, there is a strategy I find *much* more interesting than jumping out. I'd push down at 'b' \(white answers at 'c'\) and then take the corner at 'd'. White would have extremely hard time coping with the \(enormous\) bottom. The marked stone is almost impossible to pull out, but that would seem to be exactly what white has to do to have any chance of winning.]L[lo][pn][qm][oq]M[mp];W[mo]C[OL: Bad style. Aji keshi, for white may want to peep at 'a' later instead. White also makes himself heavy just wh



ere he should try to settle lightly.]L[mm];B[mn];W[ko];B[in]C[OL: Good. White seems to be under three-way attack.];W[kn];B[fn]C[OL: This is a big mistaek, for it gives white a chance to fix up his shape some, with 'a'.

Also, there is still the invasion at 'b' in the corner.

Black should play 'c'.]L[kl][cq][km];W[kp]C[OL: This is wrong. White should play 'a'.]L[kl];B[oq]C[OL: Before this move, black should force with 'a', 'b'. However, I would immediately hane in at 'c', as separating white seems to produce the best results.]L[pn][qm][km];W[kl];B[md]C[OL: This is a bad move, as it forces white to live in the corner. The corner is bigger than the side, especially now that white has the wall below.

Better to play at 'a'.]L[pb];W[nd]C[OL: This is strange. White seems to think that capturing the marked stone is big, but it is not. Black can always use various forcing moves, mainly 'a', to reduce the top.]M[md]L[jd];B[me]C[OL: Bad. Black should hane at 'a'.]L[ne];W[ne]C[OL: This is downright bad, for it gives black an excellent chance to remedy the whole situation.

If black first forces 'a', 'b', and then plays 'c', the three marked white stones become heavy and useless. Black gains the corner and can look forward to attacking all over.

Furthermore, if white defends after 'c' with, say, 'd', black 'e' secures the bottom left and at one strike finishes the game beyond doubt. Well, of course, instead of 'e', 'f' should also be good enough to finish the game, and is a bit simpler if also a bit smaller.]L[jd][hb][pb][ng][er][jf];B[je]C[OL: Almost there, but not quite, this does not work.

If white plays elsewhere and black pushes out at 'a', the sequence to 'g' does not capture the three stones. A stone at 'g' would, of course, make a difference.

All in all, 'e' is the vital point.]L[hb][ib][ic][id][jd][jc][ie];C[OL: This invasion is not nearly as big as it looks.]W[ph];L[qh]C[OL: Connecting underneath at 'a' would probably be good enough.

However, the marked stone is poor style. It just aout forcet white 'a', which is something white wants to play anyway. Black is helping white.]B[of];W[nh];M[of]L[qh]C[OL: 'a' is more important, but once the marked stone is in place, this cut is almost compulsory.]B[nf];W[rh]C[MD: Q10 looks very lonly.

OL: Nevertheless, the right side is not as big as it looks.];M[of][nf]B[pb]C[MD: Wouldn't 'a' leave a stronger, less attackable position? I feel Q18 is good as well.  I would feel safer against a stronger opponent with 'a'.

OL: What with the marked stones in position, there is nothing to fear in the corner. The actual move may even be better than 'a', and certainly I'd play it instead of 'a'.

However, 'b' would seem to be the biggest and the most urgent move on the board.]L[pc][er];W[lm];B[qo];W[rn];B[qm]C[MD: I feel the need to play somewhere in the center, one of a-d. I like 'a' best because it threatens to pull out Q10 and gives black some presence in the center.

OL: First, the actual move is no good, it is too small and aji-keshi.

The center is not important at the moment. 'e' and 'f' are the boggest points, and 'f' seems more urgent.]L[lj][lh][il][ij][jc][er];W[qn];B[pn];W[ql];B[ro];M[qn][rn]C[OL: Excellent, better late than never.

The capture of the two marked stones is nothing compared to this invasion.]W[cq];B[er]L[cp][cg]C[MD: I would play 'a', if white lives, it will be smaller and I would not want to give up so much of the left side so easily.

OL: It's very difficult to know which way to play. Neither makes very much territory, remember that white still has the hane at 'b' in reserve.];L[cp][bp][bq][bo]C[OL: This seems foolhardy, as a push through and cut of 'a' to 'c' makes things extremely hard for white.

Better to play at 'd'.]W[co];B[do];W[cn];B[cp];W[bp];M[kl]B[bo]L[cm][cg][bq]C[MD: 'a' contains white, B5 doesn't accomplish anything.

OL: between the hane at 'b' and the influence of the marked stone, the centre does not seem very large.

However, I would cut at 'c' so as to give white no extra help in settling himself.];W[bn];B[bq];W[ao];B[cr];W[dm];B[em];C[OL: This seems to be an overplay.]W[el];B[fl]C[MD: Why not 'a'? If W @ 'b' then B @ F8.  If W @ 'c' then B @ 'd'.

OL: Now I'm amazed. There's no way 'a', 'b', f8 would happen, since 'a' is an atari. More like 'a', 'b', 'd'...

Anyway, 'a' indeed does seem the correct move. If white 'd', then 'b' seals white in in sente and black gets to play 'e'.]L[dl][cl][dk][cm][jc];C[OL: White must have been extremely happy to remedy the situation.]W[dl];L[jc]C[OL: Nothing doing. Besides being small, as the centre is non-existent, the connection to the group above is not necessary for either of the groups.

Black should play at 'a'.]B[fk];W[gm];C[OL: Good.]B[gn];W[nr];L[jc]C[OL: Still 'a'.]B[or];W[jr];B[hr];W[jq];L[jc]B[mr]C[MD: Still a wide open center, I would save this move until later.


OL: Yes, this is indeed too small for now. 'a'.];W[nq];B[ns];W[li];B[rm];W[rl];B[sn];L[jc][kb]C[OL: This seems an overplay, as black 'a' smothers whatever attemp there is.

It seems to me that white would have to start at 'b'.]W[ke];B[mc];W[jd];C[OL: This is nothing doing.]B[id];W[ic];B[ie];W[kc];B[lb];W[kf];B[lg];W[cg];B[dg];W[dh];B[eg];L[ch][bg][ci]C[OL: This seems an overplay. Just what is white going to do if black cuts with 'a', 'b', 'c'?]W[eh];B[fh];W[fi];B[ch];W[fg];C[OL: Good. Black keeps his mind calm.]B[gh];W[ci];C[OL: Capturing the singe stone is better style.]B[bh];W[di];B[bi]L[bg]C[MD: I think I would have 'a' to take some of the preasure off 2 set of 2 black sto



nes.  D10 is still a problem for white.];L[cj][ei][de]C[OL: Once again an overplay. If black now ataris at 'a' and after white 'b' connects at 'c', white will have extremely hard time salving anything, for 'd' threatens the white group below.]W[bg];B[cj];W[ei];L[de]C[OL: A most unfortunate mistaek. 'a' was correct.]B[gi];W[ef];B[fj];W[df];C[OL: A further mistaek.]B[gg];C[OL: Now white seems to be leading in territory.]W[ej];B[ni];W[mh];B[oh];W[oi];B[og];W[pi];B[lh];W[mi];B[gl];W[hm];B[fm];W[qc];B[pc];;B[rf



];W[sf];B[sg];W[se];B[rg];W[qe];B[pe];W[rb];B[sc];W[qb];B[qd];W[hj];B[gj];W[ji];C[OL: Excellent.]B[ri];W[qj];B[im];W[kh];B[kg];W[jg];B[qk];W[mf];B[mg];W[lf];B[ng];W[nb];B[mb];W[kb];L[na]C[OL: This is a really huge blunder. A hane at 'a' would have won the semeai.

As this is good enough to lose the game, I end the commentary here.

White finally wins by 10 points.]B[ob];W[na];B[oa];W[la];B[rj];W[qi];B[pl];W[rk];B[nm];W[ol];B[nl];W[pk];B[ok];W[nk];B[pl];W[oj];B[sh];W[il];B[hl];W[ip];B[hq];W[is];B[jl];W[ik];B[jk];W[jj];B[jm];W[hs];B[fr];W[kk];B[lq];W[mq];B[lr];W[io];B[ho];W[km];B[aq];W[de];B[ek];W[dk];B[cl];W[ck];B[bj];W[bl];B[ap];W[bo];B[ff];W[gs];B[no];W[fs];B[es];W[gr];B[gq];W[hh];B[ih];W[hg];B[hi];W[ig];B[ii];W[dc];B[jh];W[jf];B[ki];W[kj];B[ij];W[ed];B[ir];W[js];B[sl];W[qk];B[qh];W[pg];B[oe];W[ma];B[pf];W[ol];B[pm];W[jn];B[hn];W[iq



];B[qg];W[sk];B[eg];W[dg];B[hf];W[np];B[op];W[kq];B[fg];W[ls];B[ms];W[ks];B[lp];W[lo];B[sj];W[sm];B[bk];W[cm];B[sl];W[os];B[ps];W[sm];B[jb];W[jc];B[sl];W[kr];B[os];W[sm];B[am];W[al];B[sl];W[br];B[dq];W[sm];B[mj];W[nj];B[sl];W[ar];B[cq];W[sm];B[lj];W[ni];B[sl];W[kh];B[sm];W[ki];B[ee];W[ok];B[if];W[ka];B[od];W[om];B[oc];W[mm]C[Black: 59 + 31 = 90

White: 62 + 38 = 100

White wins by 10])
-- 

	Olli, 3 dan
--
E-mail: olounela@cc.helsinki.fi           ! .sig still under construction.
Newsgroups: rec.games.go