5/9 in Bremen

Eind september heb ik een GM-toernooi in Bremen gespeeld. Met 5 uit 9 ben ik met een minimale elowinst ongeveer op mijn rating geëindigd. Voor de GM-norm was 6.5/9 nodig.
Na 5 rondes was ik hiervoor redelijk op weg met 3.5/5. In de vijfde ronde liet ik mijn tegenstander kansloos in de draak.

Voor mijn verslag in het Engels en de partijen in een mooie pgn-viewer zie ook NewsAboutChess.
###pgn###

[Event "Bremen"]
[Site "?"]
[Date "2013.09.25"]
[Round "5"]
[White "Burg, Twan"]
[Black "Asendorf, Joachim"]
[Result "1-0"]
[ECO "B76"]
[WhiteElo "2490"]
[BlackElo "2357"]
[PlyCount "59"]
[EventDate "2013.??.??"]
[SourceDate "2004.06.07"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2
O-O 9. O-O-O {Previously I had played 9.Bc4. The line chosen in this game is
more positonal. Soon we see why.} d5 10. exd5 Nxd5 11. Nxc6 $1 bxc6 12. Bd4 $1
{With the last 2 moves white made a weakness in blacks pawn structure by
exchanging the knights and now offers the sacrifice of the dark-squared
bishops. After the exchange of these two pieces blacks attacking chances are
minimized and what is left is a calm position with a structural advantage.}
Bxd4 (12... e5 {I found an old game by my opponent with this move, but anyway
I checked the 3 main possibilities for black in this position: Bxd4, Nxc3 and
e5. With 12..e5 black can keep the bishops on the board, but the diagonal is
closed. White can centralize his pieces with Bc5, Ne4 and Bc4, and then also
start an attack on the kingside.}) 13. Qxd4 Qb6 14. Na4 {So black has two
isolated pawns on the queenside and white has a better development. The
c5-square is a nice outpost for the knight, so the knight is well placed on a4.
} Qc7 (14... Qa5 {Is an important alternative.}) 15. Bc4 Rd8 16. Nc5 $1 {To
prevent the bishop from coming to e6. In general black has some problems with
his bishop in this line, becaus the knight is controlling many white squares.}
(16. Bb3 Be6 $1 17. Nc5 Nf4 {Is very fine for black already.}) 16... Bf5 {
Black is using his chance to get the bishop out.} 17. Bb3 $1 {A necessary
profylactic move, because Bxc2 is threatened. Now white aims to play g4,
kicking back the black bishop.} (17. g4 Bxc2 $1) 17... Nf4 (17... Nb6 18. Qe3
Nd5 19. Qg5 $1) (17... h5 18. g4 $1 {and black was soon crushed in
Karjakin-Van Wely.} e5 19. Qg1 Nf4 20. Re1 hxg4 21. fxg4 Bc8 22. Qg3 a5 23. Qh4
a4 24. Bxf7+ $1 {Karjakin-Van Wely TATA 2013}) (17... g5 $5 18. g3 $5) 18. Qf2
Qb6 $5 {Pinning my knight.} 19. g3 Ne6 20. Bxe6 $1 {At first I was not happy
with giving up the bishop, but then I realized that my knight is much strong
than his bishop.} Bxe6 21. Rhe1 $1 Rd5 (21... Rab8 22. Rxd8+ $1 Rxd8 23. Qe3 $1
{Now my queen is protected, so I threaten Nxe6.} Rd6 24. Qc3 {Maybe the pawn
ending is won, but this is a simple way to get advantage.} (24. Nxe6 Rxe6 25.
Qxb6 Rxe1+ 26. Kd2 axb6 27. Kxe1 {The threat to create an outside passed
a-pawn is very annoying for black.})) (21... Bxa2 {The bishop is not likely to
survive here.} 22. b3 $1 a5 23. Rxd8+ Rxd8 24. Rxe7 $18) 22. Rxd5 cxd5 23. Qd4
$1 {Stronger than Qe3. Also here the queen is protected after Nxe6. The
difference is that when the bishop moves I can take with my rook on e7.} Qa5
24. Re3 Bf5 ({After} 24... Qxa2 {I can take on e6 with my knight or maybe even
with my rook. In both cases his king will be in much more danger than mine.})
25. Rxe7 Rc8 26. a4 $1 {The idea is that he cannot take my knight on c5 now,
and that my next move is b4 and then doesn't have a check on a3 anymore.} (26.
g4 $1 {Was possible too.} Bxc2 27. Qf6 Rf8 28. Nd7 Qxa2 29. Kxc2 Rc8+ 30. Kd2
Qa5+ 31. Ke2 Rc2+ 32. Kf1 Qa1+ 33. Re1) 26... Bxc2 (26... Qd8 27. Rxa7 Qb6 28.
Re7 Qd8 29. Qf6 Qf8 30. b4 $18) 27. b4 $1 {Thanks to this zwischenzug I win
the bishop on c2.} Qb6 28. Kxc2 a5 29. Kb3 axb4 30. Ne6 {Forcing the exchange
of queens, which leaves a clearly won endgame.} 1-0
%%%pgn%%%

In de zesde ronde probeerde ik een zeldzame openingsvariant in het Dame-Indisch tegen GM Babula.
Dit liep echter helemaal verkeerd.

###pgn###
[Event "Bremen"]
[Date "2013.09.26"]
[Round "6"]
[White "Babula, Vlastimil"]
[Black "Burg, Twan"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "2571"]
[BlackElo "2490"]
[PlyCount "77"]
[EventDate "2013.??.??"]
[SourceDate "2004.06.07"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 g6 {I wanted to avoid the main
lines and try an interesting looking variation.} 6. Nc3 Ne4 (6... Bg7 7. d5 $1
{Would lock the bishop on b7 and give white a big spatial advantage.}) 7. d5 $1
{Closing the diagonal of my b7 bishop. Now I don't have time for Bg7 because
my knight is hanging.} (7. Nxe4 Bxe4 8. Bg5 f6 $14) 7... Bb4 ({After} 7... Nxc3
8. Qd4 {Would disturb blacks harmony.}) 8. O-O $1 (8. Qd4 Qf6 $1 {Is OK for
black.}) 8... Nxc3 9. bxc3 (9. Qd3 $5) 9... Bxc3 10. Bh6 $1 d6 (10... Na6 11.
e4 $1 {Taking space and threatening e4-e5.}) (10... Bxa1 11. Qxa1 f6 12. Ng5 $1
$18) 11. Ng5 e5 12. Ne4 (12. Rb1 Nd7 (12... Qe7 13. Ne4 Ba5 14. Bg5) 13. Ne4
Bd4 14. Qa4 Qe7 15. Bg5 f6 16. Bxf6 $18) 12... Bxa1 13. Qa4+ c6 14. Qa3 Bb2 15.
Qxb2 (15. Nxd6+ Kd7 16. Qxb2 Kxd6 17. f4 $1 e4 18. Qe5+ Kd7 19. dxc6+ Bxc6 20.
Rd1+ $18) 15... f5 16. Nc5 $1 Qe7 17. Nxb7 Qxb7 18. c5 $1 cxd5 19. Rd1 $6 (19.
cxd6 Nd7 (19... Nc6 20. Bxd5 O-O-O 21. Bxc6) 20. Rd1 O-O-O 21. Bxd5 Qa6 22.
Qc3+) 19... Nc6 20. Bxd5 O-O-O 21. cxb6 Kd7 $1 22. Be3 axb6 23. Qb5 Ra8 24. a4
(24. Bc5 $1 {Missed pin trick on c5 for third time..}) 24... Rhc8 (24... Ra5
25. Qc4 Rha8 26. Rc1 Rc5 27. Bxc5 bxc5 28. Qh4 $14) 25. Qc4 Qa6 (25... Nd4 26.
Bxb7 Rxc4 27. Bxa8 Nxe2+ 28. Kf1 Rxa4 29. Kxe2 Rxa8 30. Bxb6 $16) 26. Be6+ Kc7
27. Qh4 (27. Qd5 Rd8 28. Rc1 Qxa4 29. Rc4 $1 $18) 27... Qxa4 28. Qxh7+ Kb8 29.
Rb1 Ra7 30. Qxg6 Rd8 (30... Ne7 31. Qg5 Rc6 (31... Qe4 32. Rxb6+ Ka8 33. f3))
31. Rxb6+ Rb7 32. Rxb7+ Kxb7 33. Qf7+ Ka6 34. Bc4+ Ka5 35. Qd5+ Kb4 36. Bd2+
Ka3 37. Qd3+ Kb2 38. Qc3+ Kb1 39. Qc1# 1-0
%%%pgn%%%

Soevereine Vlastimil

In de zevende ronde verslikte ik me met wit in een scherpe variant in de
Najdorf, waardoor mijn kansen definitief verkeken waren.
In de laatste ronde won ik gelukkig nog, waardoor ik het toernooi met een
positief gevoel kon afsluiten.

'Die Mellie', mijn tegenstander uit de laatste ronde.

 ###pgn###
[Event "Werder Bremen GM-Turnier"]
[Site "Bremen"]
[Date "2013.09.29"]
[Round "9"]
[White "Burg, Twan"]
[Black "Ohme, Melanie"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "2490"]
[BlackElo "2350"]
[PlyCount "79"]
[EventDate "2013.??.??"]
[EventCountry "GER"]
[SourceDate "2004.06.07"]

1. e4 {My opponent needed a draw for her second IM-norm. Even when I would be
happy when she would achieve this, I decided I should play for a win anyway.}
c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 {I didn't expect this move from her.
Luckily, I had prepared 5.c4 a couple of times recently.} 5. c4 Qc7 6. Nc3 Nf6
7. a3 b6 8. Be3 Bb7 9. f3 d6 10. Rc1 Be7 11. Be2 O-O 12. O-O Nbd7 13. b4 Rac8
14. Kh1 Qb8 15. Nb3 Bd8 16. Na4 Re8 {# In this opening black has less space
and therefore very much would like to achieve a pawn break, preferably ..d5.
All whites moves are aimed on preventing this pawn break. White want to take
on d5, and then play c4-c5. In this way white gets a protected passed c-pawn.}
(16... Bc6 $5 17. Nd4 Bb7 18. Qd2 $14) 17. Bg1 (17. Bf2 {Is premature:} Bc7 18.
Nd4 d5 $1 19. exd5 Bxh2 20. dxe6 fxe6 21. c5 Qf4 22. c6 Qh6 $1) 17... h5 {
Diagram #} (17... d5 18. exd5 exd5 19. c5 {The idea of whites set-up. The pawn
on c5 is now protected, and the d5-pawn will be blocked, so the bishop on b7
remains passive.}) 18. Bf2 $1 Bc7 (18... d5 19. exd5 exd5 20. c5 b5 21. Nc3 Bc7
22. h3 Bf4 23. Rc2 $14) 19. Nd4 $1 {The knight has done its job on b3. Black
now needs first his bishop on e7 in order to threat d5 again by controlling c5.
} Ba8 {#} (19... Ne5 20. c5 $1 {And white went on for a win in Radjabov-Kamsky.
}) (19... d5 20. exd5 Bxh2 21. dxe6 fxe6 22. c5 Qf4 23. c6 $18 {Since black
played h7-h5, black doesn't have Qh6 here.}) (19... Bd8 {Gives white time to
improve his position.} 20. Rc2 $5 Be7 21. Qc1 {Again white has enough control
over c5, so the pawn break ..d5 is not possible.}) 20. b5 $1 a5 (20... axb5 21.
Nxb5 Bc6 22. Nac3 Nc5 23. Rb1 {I can use the b5-square as an outpost. Together
with the open b-file and open d-file white has a big pressure here.}) 21. Nc6
Bxc6 ({The alternative} 21... Qb7 {looks very ugly and it is a long process
before the knight on c6 is kicked away.}) 22. bxc6 {Until here it was still my
analysis of the game Radjabov-Kamsky. This gave me a good opening advantage
and also a huge advantage on the clock.} Nc5 {New for me, but relatively best.
The g1-a7 diagonal is blocked.} (22... Ne5 23. Rb1 Nxc6 24. Nxb6 Bxb6 25. Bxb6
$1 $16) 23. Rb1 Qa7 (23... Qa8 {Exchanges the b-pawn for the c-pawn, but white
still has the advantage thanks to the bishop pair and the better pawn
structure.} 24. Nxb6 Bxb6 25. Rxb6 $14 {Black has a strong blockade on c5, but
white has more space and a5,d6 and h5 are still targets.}) 24. Nc3 $5 {To
transfer the knight to d4, from where it protects the pawn on c6.} (24. Bh4 $5
{Threatening to destroy the blacks kingside pawn structure. However on general
grounds I decided to be careful with my blacksquared bishop.} Bd8 25. Nxc5 dxc5
26. e5 $1 Nh7 27. Qd7 $16) 24... Bb8 25. Nb5 Qe7 26. Nd4 {Black can kick the
knight on d4 away, but even when she manages to win my c6 pawn, I would have
overwhelming positional compensation.} Qc7 27. Qd2 $1 Nh7 $1 {Now she
threatens to win my pawn. However I have different ways to start an attack on
her b6 or d6 pawn.} (27... e5 28. Nf5 Qxc6 $2 29. Nxg7 $1) 28. Qb2 e5 29. Nf5
Na4 (29... g6 30. Ne3 Qxc6 31. Qxb6 Qxb6 32. Rxb6 $14) 30. Qb3 Qxc6 31. Bd1 (
31. c5 $1 {On general grounds I didn't want to give a second pawn to win the
exchange, but I will have a positionally superior position.} Nxc5 32. Bxc5 Qxc5
(32... bxc5 33. Bb5 Qc7 34. Bxe8 Rxe8 $18) 33. Bb5 $1 Red8 34. Ne7+ Kf8 35.
Nxc8 Rxc8 36. Bd7 Rc7 37. Ba4 $18 {If we count the material it is still equal,
but there is a huge white square complex and black has many weaknesses and
strange pieces.}) 31... Nc5 32. Qxb6 Qxb6 (32... Nd3 $2 33. Qxc6 Rxc6 34. Rxb8
$1) 33. Rxb6 Nd3 34. Be3 (34. Bg1 $1 {Is better, because the bishop cannot be
subject to attack on g1.} Rxc4 (34... g6 35. Nxd6 Bxd6 36. Rxd6 Nb2 37. c5) 35.
Be2 Rc3 36. Rb7 {The threat is Rfb1!} Nc5 37. Bxc5 Rxc5 38. Ne7+ Kf8 (38... Kh8
39. Nc6 $3 Rxc6 40. Bb5 Rcc8 41. Bxe8 Rxe8 42. Rfb1 {Winning the awkward
bishop on b8.}) 39. Bb5 $1 {Winning the exchange.} Rd8 40. Nc6) 34... Rxc4 (
34... g6 $1 {Would have been a good oppurtunity for black.} 35. Nxd6 Bxd6 36.
Rxd6 Nb2 37. Be2 (37. Bg1 Nxc4 38. Rd3 Nb2 $14) 37... Nxc4 38. Bxc4 Rxc4 39.
Bd2 a4 40. Bb4 {Leaving white with only a very small advantage.}) 35. Bb3 Rc3
36. Bd2 Rcc8 {Here I spend a lot of time to find the best continuation.
Finally I decided that 37.Rb7 would give the best chances.} 37. Rb7 (37. Ba4
Ba7 38. Rb7 Nf2+ 39. Rxf2 Bxf2 40. Nxd6 Red8 41. Nxc8 Rxd2 $132) (37. Bxa5 Nc5
(37... Ba7 $2 38. Bxf7+ Kxf7 39. Rb7+) 38. Ba2 $16) (37. Nxd6 Bxd6 38. Rxd6 Nc5
39. Ba2 a4 $14) 37... Bc7 $2 (37... Rc7 38. Nxd6 Rxb7 39. Nxb7 {I thought I
could win the a-pawn now and defend against the black counterplay.}) 38. Ba4 (
38. Bxf7+ Kxf7 39. Bxa5 {Would have been winning too.}) 38... Kf8 39. Bxe8 Kxe8
40. Nxg7+ {After the opening I had big positional advantages and a huge
advantage on the clock. She managed to complicate the position, but even when
I made some inaccuracies, it was hard for her to play perfectly in time
trouble, and her position collapsed.} 1-0
%%%pgn%%%

Met 5/9 eindigde ik op de vijfde plaats.
Babula won het toernooi met 6.5/9 voor Bluebaum (6/9) en Meins (5.5/9).

Het podium

Groepsfoto

In het slotweekend kwamen de voorzitter en René Olthof me nog supporteren,
bedankt voor de foto's!
Toernooisite

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