Showing posts with label Olympiad. Show all posts
Showing posts with label Olympiad. Show all posts

23 November 2008

Did Black Resign?

Did he lose on time?

Among the games on the Playchess server today is this one from yesterday:

Arakhamia-Grant,K (2448) -- Abu Sufian,S (2418) [B36]
Chess Olympiad 2008 Dresden (9), 22.11.2008

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Nf6 6.Nc3 d6 7.Be2 Nxd4 8.Qxd4 Bg7 9.Be3 0–0 10.Qd2 Be6 11.f3 Nd7 12.0–0 Nc5 13.Rfd1 a5 14.b3 Qb6 15.Rab1 Qb4 16.Bd4 Bxd4+ 17.Qxd4 Qb6 18.Kh1 Nd7 19.Qd2 Qc5 20.f4 f6 21.Nb5 Nb6 22.Nd4 Bd7 23.Rbc1 Rfd8 24.Bf3 Kh8 25.Ne2 Be6 26.Qb2 a4 27.e5 dxe5 28.fxe5 fxe5 29.Bxb7 Rxd1+ 30.Rxd1 Rb8 31.Bf3 axb3 32.axb3 Qe3 33.Qc3 Qxc3 34.Nxc3 Nd7 35.Nb5 Nc5 36.b4 Na6 37.Bd5 Bd7 38.Bf3 Be6 39.Bd5 Bd7 40.Be4 Bxb5 41.cxb5 Rxb5 42.Bd3 Rd5 43.b5 Nc5 44.Be2 Rxd1+ 45.Bxd1 Nd7 46.Kg1 Kg7 47.Kf2 Kf6 48.Ke3 Nb6 49.Bb3 e6 50.Ke4 Nd7 51.Bc2 Ke7 52.h4 Kd6 53.g4 Nf6+ 54.Kf3 Kc5 55.g5 Nd7 56.Bd3 Kd4 57.Be4 Nc5 58.b6 Nd7 59.b7 Kc5 60.Bxg6 hxg6 61.h5 gxh5 62.g6 e4+ 63.Kxe4 1–0

The final position:

Black to move


Black's knight cannot stop both pawns. However, after 63...Kd6, the king can stop one pawn, while the knight stops the other.

Play might continue 64.g7! Nf6+ 65.Kf4 Kc7 66.b8Q+ Kxb8 67.Ke5 Ng8 68.Kxe8

Black to move


68...Nh6 holds. White's promotion threat keeps Black's pawn at bay, while the king alone cannot force the knight away from defense of g8.

Resigning this position would be senseless. A class player might miscalculate, presume that White's pawns are unstoppable, and resign. On the other hand, Shakil Abu Sufian is a FIDE Master and still improving. He would at least examine a sequence of forcing moves.


Did Black lose on Time?

He might have lost on time.

This game was on board four in the Scotland-Bangladesh match, so it was not widely reported in the press. Still, if Black had lost the game on time, the information must be somewhere. I went looking and found a link to Chess Scotland from Susan Polgar's blog. Now I had a site that had every reason to follow closely the games of Ketevan Arakhamia-Grant--a woman playing for Scotland's strongest ever men's Olympiad team. It took less than a minute to locate Geoff Chandler's analysis of the game and a revealing photo: see Chess Edinburgh: Chandler Cornered.

There we learn:
The official game score shows Keti's final move as Kxe4. As Dougie Bryson pointed out this is likely to be another case of the king going to e4 to signal a White win on the DGT boards. Indeed, we can prove that now as we have photographic evidence...
I recall some brief confusion during Game 7 (see "Something Awry with the Robot") of the recent World Chess Championship when the Playchess server had 37.Ke4, leaving Kramnik's rook intack on c3. Someone pointed out then that the players had moved their kings to the center of the board to indicate a draw, but the DGT board recorded the act as an inexplicable move. Human practice and excellent broadcast technology can lead us astray.

The final position is the photo of yesterday's game shows:

Black to move


Here Black is lost. Without the check, the knight cannot stop both pawns and Kd6 is too slow. White's final move was 63.Ke3, not as reported in the game score both on Playchess and at the official site.

22 November 2008

Feasting at Dresden

Saturday morning, 8:35am Pacific Standard Time

It is late afternoon in Dresden, Germany where the Chess Olympiad is taking place. On the Playchess server there are more than three dozen games still in progress, and many others that have finished. While players in my time zone in the 1970s had to wait several days for the arrival of the New York Times and its chess column to see the results of such events, today we watch the games live thanks to the internet and DGT boards.

I'm trying to watch two games.



Kramnik-Ivanchuk started as a Nimzo-Indian, classical variation

Kramnik Vladimir (2772) - Ivanchuk Vassily (2786) [E32]
Chess Olympiad 2008 Dresden (9.3), 22.11.2008

1.d4 e6 2.c4 Nf6 3.Nc3 Bb4 4.Qc2 0–0 5.a3 Bxc3+ 6.Qxc3 d6 7.f3 c5 8.dxc5 dxc5 9.Bg5 h6 10.Bf4 Nc6 11.Rd1 Qa5 12.Bd2 Qa4 13.e3 e5 14.Ra1 Re8 15.Ne2 Bf5 16.b3 Qa6 17.Ng3 Bg6 18.Be2 Qb6 19.0–0 a5 20.Rfd1 Nh7 21.Be1 Ng5 22.Rd5 Ne6 23.Rad1 a4 24.b4 cxb4 25.axb4 Nf4 26.Rd6 Nxe2+ 27.Nxe2 Red8 28.b5 Rxd6 29.Rxd6 Qc7

Carlsen-Beliavsky began as a Closed Spanish

Carlsen Magnus (2786) - Beliavsky Alexander G (2619) [C84]
Chess Olympiad 2008 Dresden (9.12), 22.11.2008

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.d3 d6 7.c3 0–0 8.Re1 Bg4 9.h3 Bh5 10.Nbd2 Nd7 11.Nf1 Nc5 12.Bxc6 bxc6 13.g4 Bg6 14.Ng3 Ne6 15.Kg2 c5 16.Rh1 f6 17.h4 d5 18.c4 dxe4 19.dxe4 Qxd1 20.Rxd1 Rfd8 21.Be3 Nd4 22.Rd2 Bf7 23.Rc1 Rab8 24.Ne1 a5 25.Nd3 Be6 26.f3 a4 27.Nf5 Bf8 28.Bf2 Nc6 29.Rcc2 Bf7 30.Ne3 Nd4 31.Rc1 Ne6 32.Rcd1

Thinking with my Engine

I thought Carlsen was doing well, but Hiarcs 12 had a half-pawn advantage for Black.

Black to move


Black's doubled pawns immediately appear as a weakness, but so does White's cramped position.

32...Rd4 33.Kh2 Rbd8 34.Nd5 Rxc4 35.b3 axb3 36.axb3 Rd4 37.Bxd4 Nxd4 38.Kg2 Nxb3 39.Rb2 c6

Meanwhile, Kramnik is nursing a small advantage.

After 29...Qc7


30.c5 Na5 31.Qb4 Nb3 32.c6

... back to Carlsen-Beliavsky

40.Ne3 c4 41.Nf2 Nd4 42.Rb7 c3 43.Rd3



Beliavsky's doubled c-pawns are rolling, but probably won't get much further. Hiarcs 12 has the game as even now.

43...c2 44.Nxc2 c5

...back to Kramnik-Ivanchuk

32...bxc6 33.b6 Qb7 34.Nc3 Na1 35.Qc5 a3 36.Qxc6 Qxc6 37.Rxc6 Rb8 38.Nd5 Nb3 39.Bc3 a2



40.Bxe5 f6 41.Bc3

... back to Carlsen-Beliavsky

45.Rd2 Ra8 46.Ne3 c4 47.Nfd1 Ne6



Move by move, Carlsen's position gets better. That Wunderkind will be the World Champion in a few years.

48.Rdb2 h5 49.Rb8 Ra3

Hiarcs 12 has 0.50, slight advantage for White

50.Rc8 hxg4 51.fxg4 Kh7 52.Rb7 Bg6 53.Rxc4 Nc5 54.Rbb4 Ra2+ 55.Kg3 Rd2

and the game is looking even, albeit complicated

56.h5 Bf7 57.Rc2 Rd4 58.Rxd4 exd4 59.Nf5

...back to Kramnik-Ivanchuk

Both players managed to promote pawns, and Ivanchuk forced a draw by repetition.

41...Bf7 42.e4 Bxd5 43.exd5 Na5 44.Rc5 Nb3 45.Rc6 Na5 46.Rc5 Nb3 47.Rb5 Rc8 48.b7 Rxc3 49.b8Q+ Kh7 50.Rxb3 a1Q+ 51.Rb1 Rc1+ 52.Rxc1 Qxc1+ 53.Kf2 Qd2+ 54.Kf1 Qd1+ ½–½

... back to Carlsen-Beliavsky



59...d3 60.Rb2 Nxe4+ 61.Kf4 Nc5 62.Nf2 g6 63.hxg6 Kxg6 64.Ke3 Be6 65.Nh4+ Kg5 66.Nf3+ Kg6



67.Rb6 Kf7 68.Rc6 Bd7 69.Rc7 Ke8 70.Nd4 Bh6+ 71.Kf3 Ne6 72.Nxe6 Bxe6 73.Nxd3 f5 74.gxf5 Bxf5 75.Ne5 Bf8 76.Ra7 Bd6 77.Nc4 Bh2 78.Ne3 Bd7 79.Ke4 Bg1



80.Ra8+ Kf7 81.Ra7 ½–½

Who was it that said draws were bad?

11:21am PST

21 November 2008

Carlsen-Navara, Dresden 2008

I'm finally following a single game in Dresden, and mostly logging comments on Rolling Pawn's attractive blog.

Carlsen,M - Navara, D
Olympiad, Dresden 2008

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.d3 d6 7.c3 0–0 8.Re1 Re8 9.Nbd2 Bf8 10.h3 b5 11.Bc2 Bb7 12.d4 g6 13.d5 Ne7 14.Nf1 Bg7 15.b3 Nxe4 16.Bxe4 f5 17.Bc2

Black to move


Black sacrificed a knight to get to this position. In Geller - Eingorn, Black ended up getting three pawns for the knight and went on to win. Then, in a correspondence game, Timar's 19.Bd2 appeared to take the sting out of 17...e4. Consequently, Cimra played 17...Nxd5, which is the move Navara adopted in this game.

Geller,E (2540) - Eingorn,V (2525) [C92]
URS-ch52 Riga (9), 01.1985
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0–0 9.h3 Bb7 10.d4 Re8 11.Nbd2 Bf8 12.Bc2 g6 13.d5 Ne7 14.Nf1 Bg7 15.b3 Nxe4 16.Bxe4 f5 17.Bc2 e4 18.Nd4 Nxd5 19.Ne2 Nxc3 20.Nxc3 Bxc3 21.Rb1 c5 22.Bb2 Bxb2 23.Rxb2 d5 24.Qc1 d4 25.Bd1 Qd6 26.Rc2 Rac8 27.Qg5 Qe5 28.h4 f4 29.Bg4 Qxg5 30.hxg5 Rc7 31.Rd1 d3 32.Rc3 Re5 33.f3 e3 34.Rcxd3 e2 35.Re1 exf1Q+ 36.Kxf1 Rxg5 37.Kf2 Kg7 38.Rd7+ Rxd7 39.Bxd7 Kf7 40.a4 Bd5 41.Bc8 Bxb3 42.a5 c4 43.Bxa6 c3 44.Bb7 b4 45.Ra1 Bd5 46.Bxd5+ 0–1

Timar,Z - Kovacs,A [C92]
HUN-ch7J corr Hungary, 1987
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0–0 9.h3 Re8 10.d4 Bb7 11.Nbd2 Bf8 12.Bc2 g6 13.d5 Ne7 14.Nf1 Bg7 15.b3 Nxe4 16.Bxe4 f5 17.Bc2 e4 18.Nd4 Nxd5 19.Bd2 c5 20.Ne2 Nb6 21.Rb1 d5 22.Be3 1–0

Cimra,J (2330) - Bisco,I [C92]
SVK-ch Trencin, 1991
1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0–0 Be7 6.Re1 b5 7.Bb3 d6 8.c3 0–0 9.h3 Bb7 10.d4 Re8 11.Nbd2 Bf8 12.Bc2 g6 13.b3 Bg7 14.d5 Ne7 15.Nf1 Nxe4 16.Bxe4 f5 17.Bc2 Nxd5 18.c4 Nc3 19.Bg5 Qd7 20.Qd2 e4 21.N3h2 c6 22.Be3 d5 23.Bd4 Bxd4 24.Qxd4 Qg7 25.Qxg7+ Kxg7 26.cxd5 cxd5 27.b4 d4 28.Bb3 Rad8 29.Rac1 Rc8 30.Rc2 f4 31.g3 g5 32.h4 h6 33.hxg5 hxg5 34.gxf4 gxf4 35.f3 exf3 36.Rxe8 Rxe8 37.Rd2 Re2 38.Nxf3 Bxf3 39.Rxe2 Bxe2 40.Nd2 Kf6 41.Kf2 Ke5 42.Nf3+ Bxf3 0–1

17...Nxd5 18.b4

The novelty

18...Nxc3 19.Bb3+ d5 20.Qc2 Ne4 21.Rxe4 fxe4 22.Ng5 a5 23.bxa5 Rxa5 24.Nxe4 Kh8 25.Bg5 Qc8 26.Nf6 Rd8 27.Ne3 e4 28.Rc1 h6 29.Nxe4 dxe4 30.Bxd8 Qxd8 31.Qxc7 Qxc7 32.Rxc7 Ba6 33.Nd5 b4 34.Ra7 Bd4 35.Ra8+ Kh7 36.Nxb4 Rf5 37.Rxa6

Everyone thinks that Navara is lost, except Navara it seems.

37...Rxf2 38.Rd6 Rd2+ 39.Kf1 e3 40.Rxd4 Rxd4 41.Nd5

Magnus Carlsen has the sort of advantage that I frequently manage to lose to the computer. But he's a lot better than me, and David Navara is probably not quite as good as the Silicon Beast.

41...Rd3 42.Ke1 h5 43.Bc4 Rd4 44.Nxe3 Kh6 45.a4 Kg5 46.a5 Kf4 47.Kf2 Rd2+ 48.Be2 Ke4 49.a6 Ra2 50.h4 1-0

Congratulations to Magnus the Magnificent!

I'll add some diagrams and more analysis, including taking a stab at joco's questions, later today or tomorrow. I have my make-up game with David Griffin in the Turkey Quads in less than two hours. It's a must win if I care about ratings and want my entry fee back.