Monday, February 14, 2011

King Tut in Chess Puzzles

Lubomir Kavalek

Lubomir Kavalek

Posted: February 8, 2011 06:27 PM

King Tut in Chess Puzzles

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King Tutankhamun, or simply King Tut, is the most famous Egyptian pharaoh. He was called the boy-king since he was only nine-years-old when his 10-year reign began in 1,333 B.C. He died at the age of 19 and his tomb, undisturbed for 3,245 years, was well-preserved when it was discovered in 1922 by Howard Carter. King Tut's golden burial mask became the symbol of ancient Egypt. But how did he make it into chess?

Protecting a king is vital in every chess game and pawns are best suited to do the job. When the pawns surround the king in chess problems and studies, we see some beautiful and astonishing creations. Entombing the king became a popular theme among chess composers, until things got out of hand after some of them insisted on burying the king inside a sarcophagus of eight pawns. It invoked memories of King Tut and his tomb.

We present two puzzles on this theme with the following conditions:

1. White mates in specified number of moves.
2. All eight black pawns should surround the black king. Not a single black pawn can be taken.
3. Only the white king and knight should remain on the board at the end. White has to get rid of all his other pieces.


Puzzle 1


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White mates in eight moves

The next puzzle is more elaborate and the solution is much longer.

Puzzle 2


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White mates in 17 moves.

Good luck! The solutions will appear next week.

Monday, February 7, 2011

Hikaru Nakamura's Great Chess Triumph

Lubomir Kavalek

Lubomir Kavalek

Hikaru Nakamura's Great Chess Triump

The Huffington Post, January 31, 2011

On the day the Serbian tennis player Novak Djokovic won the Australian Open in Melbourne, the American chess grandmaster Hikaru Nakamura, 23, achieved the best success of his life.
He won the chess equivalent of a Grand Slam event - the Tata Steel Chess tournament in the Dutch coastal town of Wijk aan Zee ahead of the world's four top-rated grandmasters.

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"I cannot remember the last time an American won a major tournament. I hope my victory will make for greater interest in chess back home in the [United ]States," happy Hikaru said after his victory.

On the way to first place, Nakamura defeated six opponents, drew six games and lost once, for a 9-4 score. He outpaced the world champion Vishy Anand of India by a half point. The world's top-rated grandmaster Magnus Carlsen of Norway and Levon Aronian of Armenia shared third place with 8 points. The former world champion Vladimir Kramnik of Russia and the Frenchman Maxime Vachier-Lagrave finished with 7,5 points. The other eight players didn't score above 50 percent.

The Czech David Navara and the Englishman Luke McShane showed excellent fighting spirit and shared first place in the grandmaster group B, scoring 8,5/13. Both players will be promoted to the top group next year. The Italian GM Daniele Vocaturo won group C with a 9-4 score.

Anand has been the most successful player in Wijk aan Zee, winning the prestigious event five times. He was close to triumphing this year, going undefeated and scoring four wins. But he needed one more win to catch the American grandmaster. Nakamura's nine points is an excellent result. It is one point shy of Garry Kasparov's historical record from 1999. That year Kasparov not only played well, but he also created his most spectacular game against the Bulgarian Veselin Topalov.

The tribulations and triumphs of the Advanced Caro-Kann
Nakamura and Magnus Carlsen are typical kids of Internet chess. During their teenage years they spent many hours blitzing online. As they grew older and their chess matured, they became more serious. Their opening preparation has been excellent. Good examples are two Caro-Kann games they played in Wijk aan Zee.

The solid Caro-Kann was played by many great players such as the world champions Jose Raul Capablanca, Mikhail Botvinnik, Tigran Petrosian, Anatoly Karpov and Anand. Even the young Kasparov tried it for a while. Black's position is sound and exchanging a few light pieces greatly diminishes white's attacking chances. In the Advanced variation white grabs space and keeps most of the pieces in play - and it pleases all attacking souls. The following two games show the tricks and twists of the popular line. In the first game Nakamura as black meets the Russian champion Ian Nepomniachtchi and the play turns wild in no time.

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Nepomniachtchi - Nakamura
Wijk aan Zee 2011

1.e4 c6 2.d4 d5 (Altough Nakamura plays almost everything against 1.e4, the Caro-Kann and the French defenses suit him better than the Sicilian. ) 3.e5 (The Russian champion is known for his bizzare play against the Caro-Kann, for example 3.f3 Qb6 4.a4?!) 3...Bf5 (The Advance variation gives white more space, but allows black's light bishop to jump out.) 4.h4 (The legendary Paul Keres played this tricky move already at the 1932 Estonian Junior championship where he won all nine games. It prevents 4...e6 because of 5.g4 Be4 6.f3 Bg6 7.h5 and the bishop is lost. But the popularity of this move picked up after the 1961 world championship match Tal-Botvinnik. In the past, Nepomniachtchi preferred the more solid 4.Be3.) 4...h5 (Weakening the square g5. Botvinnik, the great strategist, preferred to give up space 4...h6 5.g4 Bd7 6.h5 e6 7.f4 to counterattack with 7...c5.) 5.c4 e6 6.Nc3 Ne7 (Karpov often played here 6...Nd7 and the smooth positional choice 7.cxd5!? is white's best, for example 7...cxd5 8.Bd3 Bxd3 9.Qxd3 Ne7 10.Nf3!? with a space advantage. In an important game McShane-So, played in the penultimate round of the B-group in Wijk aan Zee, white chose after 6...Nd7 Tal's continuation 7.Nge2 and after 7...dxc4 8.Ng3 Nb6 [Novelty.] 9.Be2 [9.Nxf5 exf5 10.Be2] 9...Bg6 10.Bg5 Be7 11.Nge4 f6 12.Bf4 Nd5 13.Bg3 Qb6 14.0-0 Nxc3 15.Nxc3 Qxb2 the Englishman went for a risky Tal-like piece sacrifice: 16.Bxc4 Qxc3 17.Rc1 Qb2 18.Bxe6 keeping the black king in the middle.
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After 18...Rd8 19.d5 fxe5 20.Re1 Bf6 21.Re2 Qa3 22.Bxe5 Bxe5 23.Rxe5 Kf8 24.Qe1 the blunder 24... 24...Qd6? [24...Rh6 blunted the attack.] 25.Bxg8 Kxg8 26.Re6 Qxd5 27.Rxg6 Rh6 [27...Kh7 28.Rg5 Rhe8 29.Qb4 Qf7=] 28.Rxh6 gxh6 29.Qe3 Rd7 30.Qxh6 Rg7 31.g3 Qd4 32.Qe6+ Rf7 33.Qe2 Kg7 34.Rf1 Kg6 35.Rd1 Qf6 36.Qe3 b6 37.Rd4 Re7 38.Qd3+ Kg7 39.Rf4 Qe6 40.Rf5 Rf7 and black resigned, since 41.Rg5+ Kh6 42.Qd1 wins.) 7.Nge2 (White goes chasing the bishop, aiming for the pawn on h5. There is no doubt Nepo's choice was influenced by Svidler's victory over Nakamura in Amsterdam last year. The more popular 7.Bg5 can be best met by 7...Qb6.)

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7...Bg4!? (Nakamura's preparation was excellent throughout the tournament. He does a nice job tweaking his previous play with an unusual, provocative maneuver. Last year in Amsterdam, he lost to Peter Svidler, playing 7...dxc4 8.Ng3 Bg6 9.Bg5 Qb6 10.Qd2 Qb4 11.a3 Qb3 12.Nge4 Nd5 13.Rh3 Qb6 14.Bxc4 Qa5 15.Nd6+ Bxd6 16.exd6 Nd7 17.Rc1 Nxc3 18.Rcxc3 Nf6 19.b4 Qd8 20.Qf4 Kd7 21.Rhe3 Re8 22.b5 Qa5 23.Bxf6 gxf6 24.Kf1 Bf5 25.Be2 Rac8 26.Rc5 Qa4 27.Rec3 a6 28.b6 Bg6 29.Qxf6 e5 30.Rxe5 Rxe5 31.dxe5 Re8 32.Re3 Re6 33.Qg5 Qd4 34.Kg1 Be4 35.Qxh5 Rxe5 36.Qxf7+ Kxd6 37.Qxb7 and black resigned.) 8.f3 Bf5 9.Ng3 Bg6 (True, black lost time, but the pawn on f3 blocks the diagonal d1-h5 and makes the knight on g3 unstable. This becomes important after black breaks in the center.) 10.Bg5 Qb6 11.Qd2 Nd7 12.a3 f6! (Black has to fight back before he is smothered.) 13.Be3 Qb3! 14.cxd5 Nxd5 15.Nxd5 Qxd5 16.Rc1 Nb6 (Preventing 17.Bc4. After 16...fxe5 17.Bc4 Qd6 18.Ne2 white's pieces are more active than in the game.) 17.Ne2 (The threat 18.Nf4 forces black to take the pawn. Other moves allow black to castle long with good play.) 17...fxe5 18.dxe5 Qxe5 19.Bd4 Qc7 20.Qg5 Bf5!? (Hikaru defies gravity and doesn't drop his bishop back. After 20...Bf7 21.Be5 Bd6 22.Bxd6 Qxd6 23.Qxg7 Rg8 24.Qd4 white is only slightly worse.)

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21.g4? (Nakamura's provocation worked. Going all out, the Russian champion overextends himself a should have been punished quickly.) 21...hxg4 22.fxg4 Be4? (Too slow. The computers spit the winning line fast: 22...Be7! 23.Qxg7 Rh7 24.Qg8+ Kd7 25.Bxb6 Rxg8 26.Bxc7 Be4 27.Rh3 Kxc7 and white can't protect his kingside pawns.) 23.Rh3 Be7 24.Qxg7? (A mistake, giving black a clear advantage. White had to try 24.Qe3 Bd5 25.h5 with some fighting chances.) 24...Rh7 25.Qe5 (25.Qg8+ is met again by 25...Kd7.) 25...Qxe5 26.Bxe5 Bxh4+ 27.Ng3 Nd7 (The hitting begins. The alternative 27...Bg5 28.Rxh7 Bxh7 29.Rd1 Nd7 30.Bc7 Rc8 31.Bd6 Bc2 32.Rd4 b5 makes the white rook vulnerable.)

28.Bd4? (Leaving the knight on g3 unprotected is disastrous. After 28.Bf4 Bg6 29.Be2 black has to avoid 29... 29...0-0-0?? 30.Rxc6+! bxc6 31.Ba6 mate. After 28.Bc7 Bg6 29.Be2 Bf6 black is winning.) 28...Bf3! (A relentless pursuit of the g-pawn nets more material.) 29.g5 (After 29.Bd3 Bxg4 30.Bxh7 Bxh3 black is two pawns up, but giving up the exchange also leads to a lost position.) 29...Bg4 30.g6 Rh6 31.Rxh4 Rxh4 32.Rc3 Bf3?! (An acrobatic way to centralize the bishop. There was nothing wrong with the simple 32...e5.)

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33.Rxf3? (White misses a chance for a little swindle on the diagonal a2-g8: 33.g7!? Ke7 34.Re3 Rxd4? [34...Kd6! 35.Bc3 Bd5 36.Kd2 Rg8 should win for black.] 35.Nf5+ Kf6 36.Nxd4 Bd5 37.Nxe6! Bxe6 38.Rxe6+! Kxe6 39.Bc4+ Ke5 40.g8Q Rxg8 41.Bxg8 with good drawing chances.) 33...Rxd4 34.Bh3 Ne5 35.Rf6 Nd3+ 36.Ke2 Nf4+ 37.Ke3 e5! (Sealing white's fate.)

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38.Rf7 (The advance 38.g7 is met by 38...Nd5+ 39.Ke2 Nxf6 and black wins.) 38...Rd3+ 39.Ke4 Rxg3 40.Bd7+ Kd8 41.Bf5 Nxg6 42.Rg7 Rb8 43.b4 b5 44.Bxg6 Rg5 (Threatening 45...Rb6 and 47...c5.) White resigned.

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Against the Chinese grandmaster Wang Hao, Carlsen as white handles the Advance variation slowly. But after he outplays his opponent, the Norwegian switches to a fierce attack.
The game is very instructive.

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Carlsen - Wang
Wijk aan Zee 2011

1.e4 c6 2.d4 d5 3.e5 Bf5 4.Be3 (Carlsen goes for a positional line, quickly developing his light pieces and avoiding the wild 4.h4.) 4...e6 5.Nd2 Nd7 6.Ngf3 (Preventing the advance c6-c5 with 6.Nb3 runs into the undermining 6...f6.) 6...Bg6 (Freeing the square f5 for the knight. The most popular move seems to be 6...Ne7, some players may hit the center with 6...c5.) 7.Be2 Ne7 (After 7...Nh6 white can use an idea from the French Tarrasch and play 8.Bxh6 gxh6 9.0-0.) 8.Nh4 (Going after the bishop pair.) 8...c5 (The alternative was 8...Nf5 9.Nxf5 Bxf5.) 9.c3 Nc6 10.Nxg6 hxg6 11.Nf3 (White has a strong center, more space and a bishop pair. Moreover, it is hard to find a counterplay for black. Wang Hao bets on a queenside play.) 11...Rc8 12.0-0 a6 13.g3 (Carlsen finds a good plan: fixing the kingside first.) 13...Be7 14.h4 b5

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15.a4! (The second rook-pawn move in the row opens the a-file, giving Carlsen the opportunity to operate on both wings.) 15...Qb6 16.axb5 axb5 17.Kg2 c4?! (Closing shop in the center gives Carlsen a free hand on the kingside. Black probably had to close his eyes and play 17...0-0, pretending he did not see the kingside storm.) 18.Ng5 Qd8 19.Bg4 (Sacrifices on the squares e6 or f7 are in the air.) 19...Bxg5 (The exchange seals black's fate, but Wang Hao was afraid of the knight sacrifice, for example after 19...Qb6 20.Nxf7! Kxf7 21.Bxe6+ Kxe6 22.Qg4+ Kf7 23.e6+ Kg8 24.exd7 and black's position collapses.) 20.Bxg5 Qc7 21.Rh1 Nb6 (After 21...Kf8 22.h5 gxh5 23.Bxh5 white's attack is too powerful either after 23...f6 24.exf6 gxf6 25.Qg4 fxg5 26.Qxe6; or after 23...Kg8 24.Qf3!) 22.h5! gxh5 23.Bxh5 Na4? (The wrong adventure at the wrong time. It is only the second time when a black piece ventures into white's territory. It closes the a-file, but does not protect the rook on c8 anymore. The black king doesn't have time to cross to the queenside. For example, after 23...g6 24.Bg4 Rxh1 [24...Kd7 25.Qf3!] 25.Qxh1 Kd7 26.Bxe6+! wins.)

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(Carlsen took a deep breath here, calculating the bishop sacrifice. In a critical moment, he wanted to make sure everything worked smoothly and didn't want to trip up.)

24.Bxf7+! (Computer engines could not come up quickly with the bishop sacrifice, but once it was played, they were united in high praise for Carlsen's tactical skills.) 24...Kxf7 (After 24...Qxf7 25.Rxh8+ wins.) 25.Qf3+ Kg8 (After 25...Kg6 white wins with the spectacular 26.Bf6!!, for example
a) 26...Rcg8 27.Rxh8 Rxh8 28.Qg4+ Kh7 [28...Kf7 29.Qxg7+ wins] 29.Qh5+ Kg8 30.Qe8+ Kh7 31.Rh1 mate;
b) 26...gxf6 27.Qxf6 mate;
c) 26...Rxh1 27.Rxh1 Kf7 28.Qh5+ g6 29.Qh7+ Ke8 30.Qg8+ Kd7 31.Rh7+ wins.)

26.Rxh8+ Kxh8 27.Rh1+ Kg8 28.Qh5 (All three white pieces aim at the black king and black has no defense against the beautiful finale.)
28...Rf8 (After 28...Nxb2 29.Bf6! Ne7 [or 29...Qa7 30.Qh8+ Kf7 31.Qxg7+ Ke8 32.Rh8 mate.] 30.Qh8+ Kf7 31.Qxg7+ Ke8 32.Rh7 wins.;
28...Ne7 29.Bxe7 Qxe7 30.Qh8+ Kf7 31.Qxc8 wins.;
28...Nd8 29.Qe8 mate;
28...Qf7 29.Qh8 mate.)

29.Bf6!

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(Closing the show with a splendid bishop move. After 29...Qa7 white reshuffles the pieces 30.Qg6 Nb6 31.Rh7 Rf7 32.Qh5 and wins; and after 29...gxf6 30.exf6! Rxf6 31.Qh8+ Kf7 32.Rh7+ Kg6 33.Qg8+ Kf5 34.Rh5+ Ke4 35.Qg4+ Kd3 36.Qd1+ Ke4 37.Qb1 mates.) Black resigned.


Photos © Frits Agterdenbos of ChessVista



Chess Robots By The Sea

Lubomir Kavalek

Lubomir Kavalek

Chess Robots By The Sea

The Huffington Post, January 24, 2011

Are chess players becoming robots by repeating moves approved at home by their computers?
Can't they just use their own heads during the game?

Of course they do, but at the same time even the world's top chess players have to use computers to win chess games. Not during the games - that's forbidden - but in their preparations. And they don't even have to be there. The computers can find a winning solution while the players eat at a nearby restaurant. They come home, apply the knowledge to the game, perform the moves like robot and claim victory. The times are gone when the legendary grandmaster David Bronstein would think 40 minutes before he made the first move. Now the players blitz away 30 moves, only replaying the computer recommendations. During the year's first major tournament, underway in the coastal Dutch town of Wijk aan Zee, some of the robotic skills were evident. Even the world champion Vishy Anand of India successfully retrieved a two-year-old knight sacrifice from his machine and won a nice game.

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The traditional chess festival grew from a local club event in 1938 to a hugely popular chess festival where hundreds of amateurs can mingle with the world's best players and can get the first cold or flu of the year. The stars - Anand, Magnus Carlsen of Norway, Levon Aronian of Armenia and Vladimir Kramnik of Russia - were natural contenders for the first prize in the grandmaster group A. Carlsen slipped in the third round and lost to Amish Giri. It was the top American Hikaru Nakamura who took the sole lead after seven rounds with 5,5 points. In his next game, Nakamura lost to Carlsen. And the standings are jammed as follows: Anand and Nakamura 5,5 points out of eight games; Aronian,Carlsen, Kramnik and the Frenchman Maxime Vachier-Lagrave 5 points. The last five rounds promise a dramatic finish. It can be followed on the official web site.

Displaying a natural tactical talent, Carlsen was often compared to Mikhail Tal at the beginning of his career. In his book Heroes of Classical Chess, published by Everyman Chess, Craig Pritchett puts him in the same league with Akiba Rubinstein and the world champions Bobby Fischer, Vassily Smyslov and Anand. In the book Champions of the New Millenium, published by Quality Chess, Carlsen was called the improved Capablanca for his deep endgame understanding and excellent ability to calculate.

His victory against Nakamura in Wijk aan Zee is an attacking masterpiece, well suited to be included in the future editions of Jacob Aagard's excellent treaties of Attacking Manuals. The two volumes published by Quality Chess are a joy to read. The game shows the difference between attacking the enemy king with the pawns or with the light pieces. In both cases you need to weaken the king's shelter. Carlsen's pawn storm succeeded, Nakamura failed to dent white's defense. It was the Najdorf Sicilian and we pick it up after 26 moves.

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Carlsen - Nakamura
Wijk aan Zee 2011
Grandmaster Group A, Round 8

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27.Nd5!

(Showtime! Carlsen lets his pieces loose.)
27...Bxd5
(Nakamura decides to eliminate one attacking piece. Leaving the knight on the board leads to a cascade of beautiful sacrifices, for example after 27...Rc4 white can conclude the game sacrificing both rooks and a bishop: 28.Rxh6! gxh6 29.Rxf8+! Rxf8 [Or 29...Kxf8 30.Bxh6+ Kg8 31.Nf6+ Kh8 32.g7 mate.] 30.Ne7+ Kg7 31.Bxh6+! Kxh6 [Or 31...Kh8 32.g7+ Kh7 33.gxf8N+ Kxh6 34.Ndf5+ Bxf5 35.Nxf5+ Kh5 36.Qh4 mate.] 32.Qh4+ Kg7 33.Nxe6 mate.)
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28.exd5 Qxd5
(The pawn is irrelevant, but Nakamura is making sure the white knight doesn't land on the square e6. For example, after 28...Rc4 29.Ne6 Ra4 30.a3 Rg4 31.Qf2 Rxg6 32.Rh5 Qxd5 33.Rxe5! Qxe5 34.Qf7+ Kh7 35.Nxf8+ Rxf8 36.Qxf8 white should win;
Or after 28...Qb4 29.c3 Qc4 30.Bxh6! wins.)
29.Bxh6! (Unlocking the h-file.)

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29...gxh6 (Taking the other piece 29...Qxd4 leads to typical mating pattern: 30.Be3! Qg4 31.Rh8+! Kxh8 32.Qh2+ Kg8 33.Qh7 mate.)
30.g7 Be7 (Accepting the pawn 30...Bxg7 loses after 31.Nf5 Rc7 32.Nxh6+ Kh7 33.Ng4+ [33.Nf7+ takes longer to win after 33...Qxh1.] and white wins either after 33...Kg8 34.Nf6+; or after 33...Qxh1 34.Nf6+! Kh8 [34...Bxf6 35.Rxh1+ Bh4 36.Rxh4 mates.] 35.Rxh1+ Bh6 36.Rxh6+ Rh7 37.Rxh7 mate.
The difference between the two kings is noticeable after 30...Nf7 31.gxf8Q+ Kxf8 32.Nf5 Qe5 33.Nxh6 Rc7 34.Qg6! and white wins.)
31.Rxh6 Nf7 32.Qg6! (The precise way. The combination 32.Rh8+ Nxh8 33.gxh8Q+ Kxh8 doesn't work that well because the square h1 is covered and there is no 34.Rh1 mate.)

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32...Nxh6 33.Qxh6 Bf6 (The last trick [34.Rxf6?? Re1+ 35.Qc1 Rxc1 mate.], but Carlsen finishes the game forcefully.) 34.Qh8+ Kf7 35.g8Q+ Rxg8 36.Qxf6+ Ke8 37.Re1+ (After 37...Kd7 38.Qe7 mates, and after 37...Qe5 38.Rxe5+ dxe5 39.Qe6+ white picks up one of the rooks.) Black resigned.


The Philippine GM Wesley So,17, leads the B-grandmaster group with a 6-2 score. His countryman and the first Asian grandmaster, Eugene Torre, always spoke highly of him, comparing his earlier development to Bobby Fischer. So became grandmaster at the age of 14 without too much high-level coaching.

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In round 7, So won an important theoretical game in the Fianchetto Grunfeld. Developed by the Czech players in the 1960s, the variation is a classic confrontation between the white pawn center and the black light pieces. Both grandmasters, Wesley So and David Navara, played it in the past and we could have expected a new twist. It came on move 13, when So uncorked a new pawn sacrifice recommended by a few chess engines.

So - Navara
Wijk aan Zee 2011
Grandmaster Group B, Round 7

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 7.Nc3 Nc6
(Attacking the center before white castles prevents the advance of the d-pawn. The Czech grandmasters had a lion's share in developing this dynamic variation. The black pieces are holding the white pawn center in check.)
8.e3 0-0 9.0-0 Re8

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(Postponing the e7-e5 strike in the center, black plays a useful waiting move, discouraging white from developing his dark bishop on the long diagonal. The main idea is 10.b3 e5 11.d5? e4! And white is in trouble.
Kasparov gets lot of credit for using the rook move, but in fairness he was only two years old when it was first played by Vlastimil Hort during the tournament in Marianske Lazne in 1965.)
10.Re1 (The major alternative is 10.d5, hoping to grab some space. After 10.Qe2 e5 11.Nxe5 Nxe5 12.dxe5 Bxe5 13.Rd1 Qe7 14.f4 Bxc3 15.bxc3 the pawn sacrifice 15...Bf5!? 16.Bxb7 Rab8 17.Bc6 Red8, threatening a positional exchange 18...Be4, gives black a nice play on the light squares as in the game Kavalek-Hort, Marianske Lazne 1965.)
10...a5 11.Qe2
(Trying to reshuffle his heavy pieces: the queen frees the square d1 for the rook, but it allows the advance of the e-pawn.
A similar idea is 11.Qc2 e5 12.Nxe5 Nxe5 13.dxe5 Bxe5 14.e4 c6 15.f4 Bd4+ 16.Kh1 Nd5 17.Rd1 Nb4 18.Qe2 Qb6 19.a3 Nd5 20.Qc2 Nf6 21.h3 Be6 22.Na4 Qa7 23.Bd2 Rad8 24.Bc3 Nh5 25.Bxd4 Rxd4 26.Kh2 Rxa4 27.f5 Rc4 28.Qe2 Bd5 White resigned in Khismatullin -Nepomniachtchi, Moscow 2010.
Carlsen suffered a crushing defeat in the third round in Wijk aan Zee by playing 11.Qd2 against Anish Giri. The queen supported the d-pawn, but it was on the wrong spot and the game ended quickly with inexplicable blunders from white: 11...e5 12.d5 Nb4 13.e4 c6 14.a3 cxd5 15.axb4 axb4 16.Rxa8 bxc3 17.bxc3 Nxa8 18.exd5 Nb6 19.Rd1 e4 20.Ng5? e3! 21.Qb2 Qxg5 22.Bxe3 Qg4 White resigned, Carlsen-Giri, Wijk aan Zee 2011.
11...a4
(After this move, white can stick his rook on the square d1. But the problem is what can black do after 11...e5 12.Nxe5 Nxe5 13.dxe5 Bxe5 and now:
A. After 14.f4 Bxc3 15.bxc3 Bf5!? the same pawn sacrifice as in the game Kavalek-Hort still works here.

B. 14.e4!? This move gives black more fits, for example: 14...Be6 15.f4 Bxc3!? [A better alternative to 15...Bd4+ 16.Be3 Nc4 17.Bf2 with a slight edge for white.] 16.bxc3 Bd5 17.Qf2 Bc6 and in the game l'Ami-Nepomniachtchi, Wijk aan Zee 2011, round 8, white got better chances with 18.Ba3!? Na4 [Winning a pawn 18...Qd3 19.Rad1 Qxc3 is too risky after 20.Bb2.] 19.Rad1 Qf6 20.Rd4 Rad8 21.e5 Qe6 22.f5! gxf5 23.Bxc6 Qxc6 24.Qxf5 Rxd4 25.cxd4 Qe6 and instead of 26.Qg5+?, White should have played 26.Qf3!, for example 26...c6 27.Re4 Nb6 28.Rh4 Nd5 29.Qh5 h6 30.Bc1 with a decisive attack.) 12.Rd1 Be6?! (The passive 12...Bd7 was played without much success.)

13.d5!

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(The computers figured out the dangerous tactics along the d-file and came up with a promising pawn sacrifice. Navara already played 12...Be6 against Laznicka in the Czech Blitz Championship last December. The game continued with 13.Nd2 f5 14.Rb1 Qc8? and now white missed 15.d5! Bxc3 16.dxc6! and because of the threat 17.cxb7, white wins a piece. Laznicka later won anyway, but blunders are expected in blitz games. So as black had his own experience in this variation. It wasn't a good one. Instead of the blunder 14...Qc8?, he played 14...Bf7, but after 15.b3 axb3 16.axb3 Nd5 17.Bb2 Qd7 18.Na4 b6 19.Nf3 Na5 20.Ng5 Nxb3 21.Nxf7 Rxa4 white came up with a spectacular move 22.Nd6!

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22...Qxd6 23.Qb5, hitting everything and winning material: 23...Rd8 24.Qxa4 Na5 25.Rdc1 c6 26.Ba3 Qe6 27.Bc5 Nxe3 28.Bxb6 Nxg2 29.Bxd8 f4 30.Bxa5 Ne3 31.Qxc6 and black resigned in the game Harikrishna -So, Guangzhou 2010.)
13...Nxd5 14.Nb5!
(The point! White threatens 15.e4 and because black can't escape from the pin quickly, white gets a bishop pair and shatters black's pawn structure. White can't utilize the pin immediately with 14.Nxd5 Bxd5 15.e4 since black has 15...Bc4! 16.Qc2 Nb4! winning.) 14...Qc8 15.Ng5 Rd8 16.Nxe6 fxe6 17.Rb1

2011-01-24-So2.jpg


(Preparing to develop the dark bishop, white is slightly better. He has a bishop pair, no weaknesses and threatens to drive black pieces back. Black's extra pawn is not significant, it's an useless double-pawn. His other pieces are not well coordinated. Even if there is some way to hold the position, it would not be pleasant.) 17...Kh8 (Anticipating a hit from e6, Navara removes his king. The alternatives include some knight moves:
A. 17...Nb6 18.Bd2 Ne5 19.Bc3 Rxd1+ 20.Rxd1 c6 21.Bxe5 Bxe5 22.Nd4 Bxd4 23.exd4 Nd5 24.Bh3 Kf7 25.Re1 Nc7;
B. 17...Ne5 18.e4 Nb6 19.Rxd8+ Qxd8 20.Bg5;
C. Deep Rybka 4 recommends to retreat 17...Nf6 18.Bd2 Ne5 or 18...Ne8 19.f4 Nd6 and the chances are roughly equal.)
18.Bh3 (Interestingly, So refrains from the move e3-e4 that weakens the square d4.)
18...Nf6 19.Bd2 Ra6 (The machines like 19...Ne4 better, although white has some pressure after 20.Bc3 Nxc3 21.bxc3 Rxd1+ 22.Rxd1 Nd8 23.Qc4 c6 24.Nd4.)
20.Bc3
(White's bishop pair has black's position in crossfire.) 20...Rd5 21.Rxd5 Nxd5 22.Bxg7+ (Removing the defender is preferable to keeping the bishop pair with 22.Be1.) 22...Kxg7 23.Qc4 (Threatening to win a piece with 24.Qxd5. Other road to advantage is 23.Rd1 Nf6 24.e4 Rb6 25.e5.)

23...Nf6 24.Rd1! (24.Bxe6 Ne5 25.Bxc8 Nxc4 makes the defense easier for black.) 24...Kf7 25.Qf4!? (Stronger than going into a slightly better endgame after 25.Bxe6+ Qxe6 26.Qxe6+ Kxe6 27.Nxc7+ Ke5 28.Nxa6 bxa6.)

2011-01-24-So3.jpg


25...Rb6 (After 25...Ra5 26.Qxc7 Qxc7 27.Nxc7 white stands better.) 26.Qxa4 Ne5 27.Nd4 c5 28.Qc2! (The pin allows white to protect the b-pawn.) 28...Rd6 29.f4!?

2011-01-24-So4.jpg


(Taking advantage of the unstable black horse.) 29...Neg4 (The knight will be vulnerable, but after 29...Ned7 30.Nxe6 white is a healthy pawn up since 30...Rxe6 31.Bxe6+ Kxe6 loses to 32.Qc4+ Kf5 33.e4+! Nxe4 (33...Kg4 34.Qe6+ Kf3 35.Rd3+ Ke2 36.Qb3 Nxe4 37.Qd1#) 34.Qd5+;
After 29...Nc6 30.Qxc5 white should win.) 30.Re1 b6 [30...Kg7 31.Nf3±] 31.Nf3 Qd7? (Stepping into a fork, black loses a piece. After 31...Rd8 32.Qb3, threatening 33.Ng5+ and 33.Qxb6, white wins a pawn.) 32.Bxg4 Nxg4 33.h3 (Winning a piece.) 33...Nxe3 (After 33...Nf6 34.Ne5+ white wins.) 34.Rxe3 Black resigned.

Photos © Frits Agterdenbos of ChessVista

Saturday, February 5, 2011

Aggiornata al 31/12/2010 l'enciclopedia dei gambetti

Aggiornata al 31 dicembre 2010 l'enciclopedia dei gambetti

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The Gambit Encyclopedia is up to date at December 31, 2010.
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