5th Go WCH analysis by SC von Erichsen

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Thibault de Vassal    (2011-03-24)
5th Go WCH, analysis by SC. von Erichsen

Svante Carl von Erichsen is FICGS Go champion... for the 5th time! After his win in the match that opposed him to Olivier Drouot, here are his analysis on the games:


- Congratulations for this 5th win in the FICGS Go championship! By seeing the score you give less and less chances to your opponents who seem stronger each time though... Several games may look quite mysterious to weaker players. What happened during these games?

- Svante Carl von Erichsen:


I do not have the impression that my opponents have less and less
chances. I also make many mistakes, and was in a clearly bad position
in at least one game. Olivier made many very unusual moves in the
opening, which were difficult to handle in a calm manner.


In game 3 (47578), this is apparent at move 18. White has gone for a
very centre-oriented game, while Black has made more direct profit.
It is difficult to say who got the better deal. Move 18 itself is
very unusual, and I am not sure whether the result was satisfactory
for me. I think that moves 41 and 43 were important, as stabilizing
the group in the centre takes priority when the centre is dominated by
White like this. At move 53, it is clear that Black needs to stabilize
the top group, but D18 seems more important in retrospect. Move 62 is
a bit odd---I think that living with S16 instead would be better. I
think that Black got a territorial advantage here. Since White got
additional central strength, Black turned to make his central group
safe again, which should be enough to win now. White 94 tries to
shake up things again, but getting separated on the lower side makes
it very hard for him.


In game 5 (47580), Olivier chose a very unusual move again at move 8.
I think that the outcome until move 17 favours Black, however. At
move 36, it looks like Black will have to live in the corner, but the
white enclosure does have its holes. Alas, White's response to the
forcing move at P10 was a severe blunder, as Black can take back the
right side. Move 55 was big, but I had not anticipated that the fight
after move 56 would be so hard for me. I think that after move 93,
White put too much emphasis on hollowing out what once seemed like
prospective black territory. The ponnuki in the centre was worth much
more than what White made on the second line. With that strength,
reducing the white framework on the left was no question. I think
that White then tried too hard in the centre.


Game 1 (47576) was characterized by a big fight starting from the
joseki in the lower right corner. I guess that a stronger player
could point out several mistakes by both sides. It resulted in a big
exchange, where quite some aji remained in both positions. Move 90 is
an unusual idea, it would be more normal to extend on the side. 91
and 95 were intended as forcing moves to give some support to the top
side. I think that Black has good prospects after move 99 and
especially after 113. White started an interesting invasion on the
left then, which was however stopped by the blunder at 138.


Game 4 (47579) again featured some unusual moves in the opening,
namely moves 7 and 9. I think that immediately plunging through at 10
was not good. It was quite difficult for me to keep territorial
balance afterwards. I think that my invasion at the top was
premature, but it seemed like I could not keep up without it. The
attack at L13 was severe. I got lucky that Black kept back a bit, so
that I could get the cut at E7, which was more important than the six
stones around N13. It would have been possible to save them at move
98, but at the cost of letting Black break through L10. Sacrificing
them allowed me to cement the centre to put me comfortably ahead. L9
was then the start of a desperate attempt to reduce the centre. I was
quite sure that I could capture it, even though simply connecting
would most likely have been enough. I then made a big blunder again
with move 130 (I had to double hane), allowing a game-deciding ko.
Black had a lot of threats against the lower right corner, and I think
that this exchange would have put him ahead. However, he thought he
had an internal threat at D10, which I think was not one, as there was
no additional eye in the centre yet.


In game 2 (47577), he got me in the opening with another of his
experiments (move 7). I think that I could have been satisfied if I
simply played the keima to P2 at move 14. However, I activated the
central stone instead, which led to Black getting solid positions on
both sides, while I lived small in the corner and struggled in the
centre. I then succeeded in making him overconcentrated on the lower
side, but at the expense of a quite large corner and not making many
points myself. Move 80 tries to stir things up more. I think that if
Black had secured O13 with move 97, the game would have been over.
However, things only began to look good for White after move 127,
which had to be played at R8 (it is sente against the middle group
then, so Black can live with S5). It is still not over, however, as
White has two weak groups to take care of. The lower side group can
live locally with a ko at G1, but the other group has to struggle---it
would be nice to find a clean sacrifice plan here, because it is hard
for the two groups not to compete for eye space. This was the last
game to end, and my opponent seems to have chosen to resign all when
he did not see a way to win the overall match anymore.

All in all, these were very interesting games where I think I learnt a
lot. I wish to thank my opponent, who played very well.



Wilhelm Schuett    (2011-03-24 17:59:43)
5th Go WCH, analysis by SC. von Erichsen

Thanks Svante!

Don Groves    (2011-03-24 21:35:58)
5th Go WCH, analysis by SC. von Erichsen

Many thanks from me also! Your analyses of the games is very valuable for study.





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