Showing posts with label WCC Chennai. Show all posts
Showing posts with label WCC Chennai. Show all posts

05 December 2013

Following Carlsen's Reti

A recent correspondence game followed in the wake of Magnus Carlsen's worst game in the World Championship match with Viswanathan Anand. It was part of a match between Team USA: Northwest and Team Slovenia on Chess.com.


Stripes,James (2167) -- Kovač,Miha (2101) [A09]
WL2013 R9: Team USA: Northwest vs Team Slovenia Chess.com, 18.11.2013

1.Nf3 d5 2.c4 dxc4

2...c6 is most popular, followed by 2...e6, and 2...d4.

3.Qa4+

3.g3 has been my normal response in more than 100 online blitz games. On the other hand, ChessBase Online has a mere 74 moves with 3.g3. 3.d4 leads the way with nearly 23,000 games. Second place, 3.e3, has 911 games.

3...Nc6 4.g3

I opted to follow Magnus Carlsen's recent WCC game, even though it had been the game that offered Anand his best prospects of winning.

4.Qxc4 has been my choice in three prior games. Two of these were in September 1999 on the Internet Chess Club--both wins.

4...g6 5.Bg2 Bg7

White to move

6.0–0

Playing from memory, rather than databases, I missed the path that I had chosen. Or, perhaps I had my doubts about Carlsen's position.

Carlsen's move may be best: 6.Nc3 e5 7.Qxc4 Nge7 8.0–0 0–0 9.d3 h6 10.Bd2 Nd4 11.Nxd4 exd4 12.Ne4 c6 13.Bb4 Be6 14.Qc1 Bd5 15.a4 b6 16.Bxe7 Qxe7 17.a5 Rab8 18.Re1 Rfc8 19.axb6 axb6 20.Qf4 Rd8 21.h4 Kh7 22.Nd2 Be5 23.Qg4 h5 24.Qh3 Be6 25.Qh1 c5 26.Ne4 Kg7 27.Ng5 b5 28.e3 dxe3 29.Rxe3 Bd4 30.Re2 c4 31.Nxe6+ fxe6 32.Be4 cxd3 33.Rd2 Qb4 34.Rad1 Bxb2 35.Qf3 Bf6 Carlsen,M (2870) -- Anand,V (2775) Chennai 2013 ½–½

6...e5 7.Nxe5!?

This interesting move has produced five draws and three White wins in ChessBase Online.

7.Qxc4 seems the safer alternative, and is the most popular choice.

Black to move

7...Bxe5 8.Bxc6+ bxc6 9.Qxc6+ Bd7 10.Qe4

Black to move


10...f6 11.f4 Bf5 12.Qe3

12.Qc6+ Bd7 could be a useful repetition when the time control is based on a set number of moves. White also has the option of bailing out of the game with a repetition here.

12...Bh3

This move had not been played at move 12, but was played in the same position by Etienne Bacrot earlier this year. In that game, there had been repetitions of queen checks at c6. Bacrot lost that game, but went on to win the tournament.

Predecessor (2): 12...Qd4 13.fxe5 fxe5 14.Qxd4 exd4 Dubov,D (2624) -- Najer,E (2626) Moscow 2013 ½–½ (65)

White to move

13.Rf3 Nh6!N

An improvement over Bacrot's Bg4.

14.fxe5 Ng4

White to move

15.Qf4

This seemingly obvious move is sub-optimal, according to Stockfish 4.

15.Qc5 Nxe5 16.Rf4 g5 17.Rf2=

15...Nxe5 16.Rf2

16.Re3 0–0 17.Qh6 Qd7 White's pieces are a long way from deployment, while all of Black's are soon in play.(17...Ng4? 18.Qxh3 Nxe3 19.dxe3 is good for White).

16...Ng4

16...0–0-/= White still has problems deploying his forces.

17.Rf3 Ne5 18.Rf2 Ng4 19.Rf3 Ne5 ½–½

I was happy to get a draw in what developed into a slightly worse position. In this matter, too, I followed the World Champion in this line.

22 November 2013

Carlsen -- Anand 2013, Game 10

The Last Battle

I would like to take some responsibility for his mistakes.
Magnus Carlsen, Press Conference
The old tiger came out to fight the young challenger today. Needing only a draw in the next three games, Magnus Carlsen had to battle Viswanthan Anand through a long game. For much of the game, however, it appeared to be the challenger who was pressing for a decision. The game reached a knight ending with many pawns on both sides of the board. Both sides had chances, but with correct play a draw seemed likely.

Carlsen opened with his king's pawn and soon found himself battling Anand's Sicilian. After some complexities where it appeared that both players made inaccuracies, the heavy pieces were swapped in one series of exchanges. Then, each player had six pawns and a knight. White had a majority on the queenside; Black had a majority on the kingside. The White king was able to occupy the center, while the Black king took up a post two squares away.

Carlsen pressed with a slight advantage. As his knight penetrated into Anand's position, it appeared that he wanted to win another game. He avoided an opportunity to repeat the position. White sacrificed his knight to contain the Black forces on the kingside, while his king mopped up the Black pawns on the queenside. Both players promoted pawns, creating a queen and knight against queen and three pawns.

Carlsen forced the exchange of queens, and the game quickly petered out to a draw.

Magnus Carlsen is the new World Champion!

Carlsen,Magnus (2870) - Anand,Viswanathan (2775) [B51]
FWCM 2013 Chennai (10), 22.11.2013

1.e4 c5 2.Nf3 d6 3.Bb5+ Nd7 4.d4 cxd4 5.Qxd4 a6 6.Bxd7+ Bxd7 7.c4

Black to move

7...Nf6

Anand played 7...e5 against Carlsen earlier this year.

Reference Game:

Carlsen,M (2868) -- Anand,V (2783) [B51]
Supreme Masters 2013 Sandnes NOR (2.3), 09.05.2013
1.e4 c5 2.Nf3 d6 3.Bb5+ Nd7 4.d4 cxd4 5.Qxd4 a6 6.Bxd7+ Bxd7 7.c4 e5 8.Qd3 b5 9.Nc3 bxc4 10.Qxc4 Be6 11.Qd3 h6 12.0–0 Nf6 13.Rd1 Be7 14.Ne1 0–0 15.Nc2 Qb6 16.Ne3 Rfc8 17.b3 a5 18.Bd2 Qa6 19.Be1 Nd7 20.f3 Rc6 21.Qxa6 Rcxa6 22.Ned5 Bd8 23.Nb5 Rc8 24.Bf2 Kh7 25.Kf1 Rcc6 26.Rac1 Bg5 27.Rc3 Bxd5 28.Rxd5 Rxc3 29.Nxc3 Rc6 30.Be1 Nc5 31.Nb5 Nb7 32.h4 Be3 33.Ke2 Bc5 34.h5 Bb4 35.Bd2 g6 36.a3 Bxd2 37.hxg6+ Kxg6 38.Kxd2 h5 39.g3 f6 40.Na7 Rc7 41.Nb5 Rc6 42.Ke2 Kf7 43.b4 axb4 44.axb4 Ke6 45.Rd3 Rc4 46.Rb3 d5 47.Kd3 Rc6 48.exd5+ Kxd5 49.Rc3 f5 50.Nc7+ Kd6 51.Ne8+ Kd5 52.Rxc6 Kxc6 53.Ng7 Nd6 54.Nxh5 e4+ 55.fxe4 Nxe4 56.Kd4 Kb5 57.g4 fxg4 58.Kxe4 g3 59.Nxg3 Kxb4 ½–½

8.Bg5 e6 9.Nc3 Be7 10.0–0 Bc6 11.Qd3 0–0 12.Nd4 Rc8 13.b3

This move does not appear in my database. 13.Rac1 was played in the sole game that reached this position.

Reference Game:

Schoeneberg,Manfred (2360) -- Danailov,Silvio (2425) [B53]
Leipzig BKL Leipzig (3), 1986
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.c4 Nf6 8.Nc3 e6 9.0–0 Be7 10.Qd3 0–0 11.Nd4 Rc8 12.Bg5 a6 13.Rac1 Qa5 14.Bd2 Qd8 15.Bg5 b6 16.Nxc6 Rxc6 17.Ne2 Qa8 18.f3 Rfc8 19.Be3 Nd7 20.b3 Qb7 21.Nd4 R6c7 22.a4 Bf6 23.Rfd1 g6 24.Ne2 Be7 25.Nc3 Rc6 ½–½

Black to move

13...Qc7 14.Nxc6 Qxc6 15.Rac1 h6 16.Be3 Nd7 17.Bd4 Rfd8 18.h3 Qc7 19.Rfd1 Qa5 20.Qd2 Kf8 21.Qb2 Kg8 22.a4 Qh5 23.Ne2 Bf6 24.Rc3 Bxd4 25.Rxd4 Qe5 26.Qd2 Nf6 27.Re3 Rd7 28.a5

Black to move

28...Qg5?

This move appears to be an error, which gives White chances for a substantial advantage. The queen must hold to prevent the e-pawn's advance. Moves like 28...Rb8 and 28...Kh7 hold the position for the moment.

29.e5 Ne8 30.exd6

30.Nc3 was the route to a superior game. During the press conference, Carlsen stated that he thought he was winning with the line he played. If he had realized it was equal, he would have spent some time to find a better move.

30...Rc6 31.f4 Qd8 32.Red3 Rcxd6 33.Rxd6 Rxd6 34.Rxd6 Qxd6 35.Qxd6 Nxd6

White to move


36.Kf2 Kf8 37.Ke3 Ke7 38.Kd4 Kd7 39.Kc5 Kc7 40.Nc3 Nf5 41.Ne4 Ne3

At this moment, the game is still going. It seems that three possible results remain. Black could win, which will lead to an eleventh game. Carlsen could win or draw, which ends the match with a new world champion.

Screenshot of iPad App 
42.g3 f5 43.Nd6

Black to move

Anand described today's game as a microcosm of the match itself. He was referring to his error on move 28, but also to the manner in which Carlsen was able to provoke errors with continuous pressure. In this position, White has choices. Black must find the only move and defend with precision.

43...g5

Anand found the only move.

44.Ne8+ Kd7 45.Nf6+ Ke7

45...Kc7 was better. White's advantage increases with Anand's move.

White to move

46.Ng8+

46.Nh5 appears to be winning. Carlsen stated in the press conference that the variations became too complex, so he decided to "shut it down" and force a draw.

46...Kf8 47.Nxh6 gxf4 48.gxf4 Kg7 49.Nxf5+ exf5 50.Kb6 Ng2 51.Kxb7 Nxf4 52.Kxa6 Ne6 53.Kb6 f4 54.a6 f3 55.a7 f2 56.a8Q f1Q

White to move

57.Qd5 Qe1 58.Qd6 Qe3+ 59.Ka6 Nc5+ 60.Kb5 Nxb3 61.Qc7+ Kh6 62.Qb6+ Qxb6+ 63.Kxb6 Kh5 64.h4 Kxh4 65.c5 Nxc5 1/2-1/2


21 November 2013

Anand -- Carlsen 2013, Game 9

This was the correct choice. I have no regrets about that.
Viswanathan Anand, Press Conference
World Champion Viswanathan Anand went all out trying to checkmate Magnus Carlsen. There were some sharp lines that both players needed to calculate. In the end, Carlsen defended accurately and Anand may have missed a line where he could have saved a half-point. Carlsen needs one draw in the next three games. He has White tomorrow.

Anand,Viswanathan (2775) -- Carlsen,Magnus (2870) [E25]
FWCM 2013 Chennai (9), 21.11.2013

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3 d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 exd5 8.e3

Black to move

8...c4

This move was first played by Alberic O'Kelly against Victor Kortchnoi in 1954. The game was drawn. Eight years later, O'Kelly had the White side and lost.

8...O-O is the most popular line, but White scores well.
8...Qc7 scores well for Black, as does the line played by Carlsen

9.Ne2

This move was first played by Viktors Pupols.

9...Nc6

Reference Game:

9...Bf5 10.Nf4 0–0 11.g4 Bg6 12.h4 h6 13.Bg2 Bh7 14.0–0 Nc6 15.g5 hxg5 16.hxg5 Ne8 17.e4 Nc7 18.e5 b5 19.Qe1 Ne6 20.Qg3 Nxf4 21.Bxf4 a5 22.Kf2 Bg6 23.Rh1 Qe7 24.Rae1 f6 25.gxf6 1–0 Pupols,V -- Wang,A Seattle 1982.

10.g4

This pawn thrust was played on move 9 in O'Kelly's games.

10...0–0 11.Bg2 Na5 12.0–0 Nb3 13.Ra2 b5 

White to move

14.Ng3

Reference Game:

14.g5 Nd7 15.e4 Nb6 16.e5 Bf5 17.f4 Na4 18.Rf3 Bb1 19.Rc2 a5 20.Rh3 b4 21.Be3 Bxc2 22.Qxc2 g6 23.axb4 axb4 24.cxb4 Nb6 25.f5 Qd7 26.Ng3 Ra1+ 27.Bf1 Nc8 28.Rh6 Ne7 29.Qg2 Nxf5 30.Qh3 Rfa8 31.Rxh7 Kf8 32.Ne2 Nxe3 33.Qxe3 Qg4+ 34.Ng3 R8a2 35.e6 Rxf1+ 36.Kxf1 Qd1+ 37.Qe1 Qf3+ 0–1 Gardner,R (2202) -- Shabalov,A (2534) Calgary 2012.

14...a5

The game's novelty.

14...Bb7 was played in a short draw in 2011.
14...Re8 was played in a game on the Internet Chess Club that White won.

15.g5 Ne8 16.e4 Nxc1 17.Qxc1 Ra6 18.e5 Nc7 19.f4

19.Rb2 may have been considered.

Carlsen discussed the position after 19.f4 during the press conference. "There were an amazing number of complicated lines," he noted. He would have liked to play g6 and maneuver his knight to f5 to blockade the pawns. But, then White can build up pressure on the queenside. Consequently, Carlsen explained, "I had to go all out for counterplay."

19...b4 20.axb4 axb4 21.Rxa6 Nxa6

White to move

22.f5

22.cxb4 may lead to equality, but that is not Anand's intent.

22...b3 23.Qf4

"I wasn't sure what to do. As it happens, my moves weren't that complicated. I had to play the only moves all the time." Magnus Carlsen, Press Conference

23...Nc7

Anand said that he anticipated 23...Kh8 24.f6 g6 25.Qh4 b2 with the difference that after Rb1, Black has Qa5.

24.f6

Black to move

24...g6

24...gxf6 is an option, but "25.Nh5 looked very dangerous here" (Carlsen).

25.Qh4 Ne8 26.Qh6

26.Ne2 might have been possible.

In the press conference, Anand went through a line where he tried to explain what he missed while anticipating this moment from an earlier position, but his line is hard to follow because Carlsen's b-pawn disappears from the board.

Where's Carlsen's b-pawn?

It was the speed of Anand's analysis that was hard to follow. Note that White's knight, too, is missing. The pawn promoted and the queen was exchanged.

26...b2 27.Rf4 b1Q+

White to move

28.Nf1?

28.Bf1 Qd1 29.Rh4 Qh5 30.Nxh5 gxh5 31.Rxh5 (In the photo above, Anand was looking at 31.Bh3, and the problem is that Black has 31...Qb6) 31...Bf5 32.Bh3 Bg6 33.e6 Nxf6 34.gxf6 Qxf6 35.Re5 (the computer likes 35.Rf5 Qxe6 36.Rf1) 35...fxe6 36.Qe3 and White can hold. Carlsen showed this line in the press conference, stating that he and Anand had discussed it after the game.

28...Qe1 0–1

19 November 2013

Carlsen -- Anand 2013, Game 8

Magnus Carlsen appeared relaxed during the press conference after today's game. He was joking with reporters and laughing at his own comments. Others were laughing too.

Asked to describe the game, he noted that he played  the most solid system against the Berlin, "yada, yada, yada, let's go to the doping control." Asked about a statement Fabiano Caruana made in an interview that Carlsen is good at finding openings that are unpleasant for his opponents, Carlsen stated, "Caruana is a very good player and a clever guy; there must be something to what he says." He said that he was not in the mood to think today. He claimed there was not much to think about in the game. He said, "I was just hoping to set some traps, and if not, to shut it down."


Carlsen,Magnus (2870) -- Anand,Viswanathan (2775) [C67]
FWCM 2013 Chennai (8), 19.11.2013

1.e4 

Anand thought for nearly five minutes after Carlsen played this move. Many predicted that Anand would meet this move with the Sicilian. In the postgame press conference, Anand stated that he did not know his opponent's intentions, and there are dry systems against the Sicilian as well.

1...e5 2.Nf3 Nc6 3.Bb5 Nf6 4.0–0 Nxe4 5.Re1

5.d4 see game 4 for the Berlin Wall, but Anand as White.

5...Nd6 6.Nxe5

Black to move

6...Be7

Every beginner should learn 6...Nxb5 7.Nxc6+ winning the queen.

7.Bf1 Nxe5 8.Rxe5 0–0 9.d4 Bf6 10.Re1 Re8

10...Nf5 Neumann -- Anderssen 1866.

11.c3 Rxe1 12.Qxe1

Black to move

12...Ne8

Daniel King stated in his Power Play video that 12...Nf5 had been played from this position in the first World Championship match.

Reference Game:

Steinitz,William -- Zukertort,Johannes Hermann [C67]
World Championship 01st USA (4), 18.01.1886
1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.0–0 Nxe4 5.Re1 Nd6 6.Nxe5 Nxe5 7.Rxe5+ Be7 8.Bf1 0–0 9.d4 Bf6 10.Re1 Re8 11.c3 Rxe1 12.Qxe1 Nf5 13.Bf4 d6 14.Nd2 Be6 15.Bd3 Nh4 16.Ne4 Ng6 17.Bd2 d5 18.Nc5 Bc8 19.Qe3 b6 20.Nb3 Qd6 21.Qe8+ Nf8 22.Re1 Bb7 23.Qe3 Ne6 24.Qf3 Rd8 25.Qf5 Nf8 26.Bf4 Qc6 27.Nd2 Bc8 28.Qh5 g6 29.Qe2 Ne6 30.Bg3 Qb7 31.Nf3 c5 32.dxc5 bxc5 33.Ne5 c4 34.Bb1 Bg7 35.Rd1 Bd7 36.Qf3 Be8 37.Nxc4 dxc4 38.Rxd8 Nxd8 39.Qe2 Ne6 0–1

13.Bf4 d5 14.Bd3 g6 15.Nd2 Ng7 16.Qe2 c6

White to move

17.Re1

Carlsen's move appears to be a novelty. Two prior games reached the position before this move.

17.Be5 Bxe5 18.Qxe5 Bf5 19.Bxf5 Nxf5 20.Re1 Qd6 21.Nb3 Qxe5 22.Rxe5 f6 23.Re2 Kf7 24.Nc5 Nd6 25.f3 Re8 26.Rxe8 Kxe8 27.Kf2 b6 28.Nd3 Kd7 29.g4 g5 30.Ke3 h6 31.f4 ½–½ Rozentalis,E (2619)--Bruzon Batista,L (2691) Montreal 2013

17.Nb3 b6 18.Re1 Bf5 19.Bxf5 Nxf5 20.Nc1 Qd7 21.Nd3 Ng7 22.Be5 Re8 23.Qf1 Bxe5 24.Nxe5 Qd6 25.h3 f6 26.Ng4 Rxe1 27.Qxe1 h5 28.Ne3 Qe6 29.Qb1 Kf7 30.Qd3 Qd7 31.Qa6 Ne8 32.c4 dxc4 33.Qxc4+ Kg7 34.d5 cxd5 35.Nxd5 Qe6 36.Qd4 Nd6 37.Kf1 Nf5 38.Qc4 Ne7 39.Ne3 Qe5 40.Qa4 Qxb2 41.Qxa7 Qb1+ 42.Ke2 Qb5+ 43.Kd2 Qb4+ 44.Kc2 Qc5+ 45.Kd1 Qd6+ 46.Ke2 Kh6 47.Qa8 Kg7 48.Qe4 Qc5 49.Qe6 Qb4 50.g4 hxg4 51.hxg4 Qb5+ 52.Kf3 Qc5 53.a4 Nc6 54.Kg2 Ne7 55.Kh3 Qa3 56.Kh2 Qc5 57.Kg2 Qc7 58.Nc4 Qb7+ 59.Kg1 Nc8 60.g5 fxg5 61.Ne5 Qe7 62.Qxg6+ Kf8 63.Nf3 Qd7 64.Qh6+ Ke8 65.Qh5+ Kd8 66.Qxg5+ Kc7 67.Qf4+ Kb7 68.Nd2 b5 69.Qe4+ Ka6 70.axb5+ Kxb5 71.Qc4+ Kb6 72.Nb3 Qf5 73.Qg8 Kc7 74.Nd4 Qf6 75.Qc4+ Kd7 76.Qb5+ Kc7 77.Qd5 Qg6+ 78.Kf1 Qb1+ 79.Ke2 Qb2+ 80.Ke3 Qc1+ 81.Ke2 Qb2+ 82.Kd3 Qxf2 83.Qc5+ Kb7 84.Qd5+ Kc7 85.Ne6+ Kb8 86.Qe5+ Ka8 87.Qa5+ Qa7 88.Qxa7+ ½–½ Nepomniachtchi,I (2711)--Riazantsev,A (2688) Khanty-Mansiysk 2011

17...Bf5 18.Bxf5 Nxf5 19.Nf3 Ng7 20.Be5 Ne6 21.Bxf6 Qxf6 22.Ne5 Re8 23.Ng4

Black to move


Carlsen has set a little trap.

23...Qd8

Anand avoids the trap, and everything comes off the board.

23...Qg5? 24.f4! (24.h4 is strong, but perhaps not as good as f4)

a) 24...Qh5 25.Nf6++-

b) 24...Qxf4 25.Rf1 Qb8 26.Nf6++-

c) 24...Qd8 25.Qe5 Ng7 26.Nf6+ Qxf6 27.Qxf6 Rxe1+ 28.Kf2+-

24.Qe5 Ng7 25.Qxe8+ Nxe8 26.Rxe8+ Qxe8 27.Nf6+ Kf8 28.Nxe8 Kxe8 29.f4 f5 30.Kf2 b5 31.b4 Kf7 32.h3 h6 33.h4 h5 ½–½

18 November 2013

Anand -- Carlsen 2013, Game 7

Prophylactic Play

World Chess Champion Viswanathan Anand was hoping to put some pressure on Magnus Carlsen today, but never had more than a slight advantage. As in games 4 and 6 of the match, Carlsen adopted the Berlin Defense to the Spanish. Anand chose a line of the Exchange variation that he has played several times earlier this year, and that Carlsen has also played as White in recent events. The game was in wholly new territory by move 8, but Carlsen was able to anticipate White's plans and prevent them.

Magnus Carlsen is playing as we should expect of a World Champion. His errors are few and minor. If there is nothing in the position, he does not force matters. He wins by making his opponent play as long as there is an imbalance. Now that he has a comfortable lead in the match, he prevents his opponent from creating complications.

Anand,Viswanathan (2775) -- Carlsen,Magnus (2870) [C65]
FWCM 2013 Chennai (7), 18.11.2013

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3

4.0–0 see game 4.

4...Bc5 5.Bxc6

5.c3 see game 6.

5...dxc6

White to move

6.Nbd2

Anand and Carlsen have both played this position. Anand has played it four times prior in 2013. Carlsen had three games in 2012 on the White side.

6.h3 was played by Fabiano Caruana against Anand in the Tal Memorial Blitz earlier this year.
6.Be3 was played by Emil Sutovsky against Carlsen in 2007.
6.0–0 had been played by Anand against Arkadij Naiditsch in 2009.
6.Nxe5?? is a typical beginner's error 6...Qd4 7.Be3 Qxe5 8.d4 Bb4+ 9.c3 Qxe4 10.cxb4 Black has fewer weaknesses, active piece play, and the initiative.

6...Bg4

ChessBase Online contains seven games with this move. In a blitz game, Carlsen's classmate beat Anand from the Black side earlier this year after 6...O-O.

Reference Game:

6...0–0 7.0–0 Nd7 8.Nc4 Re8 9.a4 Bf8 10.Kh1 f6 11.b3 Nc5 12.Ng1 Ne6 13.Ne2 b6 14.f4 exf4 15.Nxf4 Nxf4 16.Bxf4 Be6 17.Qf3 Bxc4 18.bxc4 Bd6 19.Qg3 Bxf4 20.Rxf4 Qd6 21.Qf3 Re5 22.h3 Rae8 23.Rf5 Rxf5 24.Qxf5 Qe5 25.Qf1 a5 26.Rb1 c5 27.Qf2 Rd8 28.g3 Rd6 29.Kg2 Qc3 30.Qe2 Re6 31.Qd1 f5 32.exf5 Re3 33.f6 h5 34.f7+ Kf8 35.Kh1 Qe5 36.Qf1 Qxg3 37.Qf5 Qxh3+ 38.Qxh3 Rxh3+ 39.Kg2 Re3 40.Kf2 Re5 41.c3 Kxf7 42.d4 Rf5+ 43.Ke3 g5 0–1 Anand,V (2783) -- Hammer,J (2608) Stavanger 2013

7.h3 Bh5

White won a long game last year after 7...Bxf3.

Reference Game:

7...Bxf3 8.Qxf3 Nd7 9.Qg3 Qf6 10.Nc4 0–0 11.0–0 Rfe8 12.a4 Nf8 13.Bg5 Qe6 14.Bd2 Ng6 15.b4 Bf8 16.Qg4 b6 17.g3 f6 18.Bc3 Bd6 19.Ne3 Kh8 20.Kg2 a6 21.Qf3 Ne7 22.h4 b5 23.Rfb1 Qd7 24.h5 h6 25.Qg4 Qxg4 26.Nxg4 Nc8 27.Bd2 Nb6 28.a5 Nd7 29.c4 c5 30.cxb5 axb5 31.bxc5 Nxc5 32.Rxb5 Nxd3 33.Ra4 Ra6 34.Rc4 c5 35.Ne3 Rea8 36.Rc3 Nb4 37.Nc4 Be7 38.Rb3 Nc6 39.Rb6 Nb4 40.Kf3 R6a7 41.Be3 Kg8 42.Rb2 Rc7 43.Kg4 Kf7 44.Rb1 Nc6 45.R1b5 Nd4 46.Rb1 Nc6 47.R6b5 Nd4 48.Rb7 Rxb7 49.Rxb7 Ke6 50.Bd2 Ra6 51.Bc3 Bf8 52.f4 exf4 53.gxf4 f5+ 54.exf5+ Kd5 55.Ne5 Ne2 56.Be1 Bd6 57.Rxg7 Nxf4 58.Nf7 Nd3 59.Nxd6 Nxe1 60.Ne8 Rxa5 61.Rd7+ Kc6 62.Rd6+ Kb5 63.f6 Ra7 64.Re6 Nd3 65.f7 Ra4+ 66.Kg3 1–0 Adams,M (2733) -- Fressinet,L (2696) Germany 2012

8.Nf1

A new position has been reached.

Black to move

8...Nd7

Carlsen plays a nice prophylactic move stepping out of a pin before Anand has a chance to play it. This move also permits f7-f6 should White play Bg5 at some point in the future. It also takes the first step toward overprotecting the bishop on c5.

9.Ng3 Bxf3

9...Bg6 10.Bg5 f6 11.Bd2 offers White a slight edge.

10.Qxf3 g6

Carlsen prevents Nf5.

11.Be3 Qe7 12.0–0–0 0–0–0 13.Ne2

Black to move

Looking at this position, the queen's lack of mobility seems discomfiting. On the other hand, the knight was doing nothing on g3 except blocking its own g-pawn, which might like to advance.

13...Rhe8 14.Kb1 b6

White to move

15.h4

15.Qg3 does not seem to lead anywhere because the f2-f4 advance facilitates Black activity on the e-file. 15...Kb7 16.f4 Bxe3 17.Qxe3 exf4 18.Qxf4 f5 19.Ng3=

15...Kb7 16.h5 Bxe3 17.Qxe3 Nc5 18.hxg6 hxg6

White to move

19.g3 a5 20.Rh7 Rh8 21.Rdh1 Rxh7 22.Rxh7 Qf6 23.f4 Rh8 24.Rxh8 Qxh8 25.fxe5 Qxe5

White to move

There are some tactical possibilities in this position, but most club players should have little difficulty sorting them out. For a World Championship game, there is nothing happening here. After a few transparent threats are made, the players will repeat the position.

Commentators looked a some lines where queens and a pair of pawns could be exchanged. Then the two kings race towards the center, and the knights cannot find any vulnerable targets.

26.Qf3 f5 27.exf5 gxf5 28.c3 Ne6 29.Kc2 Ng5 30.Qf2 Ne6 31.Qf3 Ng5 32.Qf2 Ne6 ½–½

16 November 2013

Anand -- Carlsen 2013, Game 6

Today is a heavy blow. I won't pretend otherwise.
Viswanathan Anand, Press Conference

World Chess Champion Viswanathan Anand nears the end of his reign. Losing today was a devastating blow, as he acknowledged in the press conference. What can he do now? He can do his best. Asked to elaborate upon the meaning of doing his best, he scolded a reporter.

The game was nearly over by the time that I awoke this morning. My initial impressions are that Magnus Carlsen achieved a position where he could improve, and the champion was forced to play passive defense. After Carlsen won a pawn and the queens were exchanged, it seemed that his moves and ideas were easier to find. Anand had to find precise and difficult defensive moves. He missed something, and then his position was theoretically lost.


Anand,Viswanathan (2775) -- Carlsen,Magnus (2870) [C65]
FWCM 2013 Chennai (6), 16.11.2013

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3

Anand deviates from game 4, effectively avoiding the Berlin Wall. This second most popular move was first played by the man with the most difficult name in chess history. Tassilo von Heydebrand und der Lasa has been called von Heydebrand, von der Lasa (a name he signed with), and other variations of his name. The Prussian king, William I, was alleged to have poked fun at the confusion, stating, "Good morning, dear Heydebrand. How is von der Lasa doing?" His play of this move in 1836 is the oldest recorded in the ChessBase database. Adolf Anderssen who accounts for a large percentage of the first dozen instances played it several times.

Although vastly less popular than 4.O-O, 4.d3 scores slightly better. Anand has played it on at least seventeen prior occasions, including twice against Carlsen. Those games, a blitz and a rapid, were both drawn. Anand has played 4.O-O at least sixteen times prior to game 4 of this match.

4...Bc5 5.c3 0–0 6.0–0 Re8

Carlsen's choice here deviates from the players' rapid game in the 2011 Botvinnik Memorial. Today's game continued to follow Anand -- Aronian from this year's Alekhine Memorial until Anand's move ten.

White to move

7.Re1

Some move order nuances are difficult for me to understand. What difference does it make to play this move before Nbd2, or visa versa? 7.Nbd2 scores better. However chess statistics can be misleading. What do they reveal? What do they conceal? After Nbd2, Re1 will usually be played to permit Nf1. With 7.Re1, does the knight on b1 have other viable options? If it does, is Re1 the more flexible move?

7...a6 8.Ba4 b5 9.Bb3 d6 10.Bg5

Black to move

I was looking through the notation as the contestants were playing out the finish, and this position caught my eye as slightly unusual. Lest I be accused of making things up, my wife will attest that I blurted out, "Bg5 looks unusual." It is the novelty. Was it prepared?

10.Na3 was a possibility. Does that option explain the rationale behind 7.Re1?

Although Bg5 struck me as unusual in this position, I have seen it in many games with the Spanish Opening. In my highest rated tournament win, I played 7.Bg5. In that game, however, Black had played 3...g6. Is Bg5 a thematic move in the Spanish even though it is a novelty in this game?

Reference Game:

Anand,Viswanathan (2783) -- Aronian,Levon (2809) [C65]
Alekhine Memorial Paris/St Petersburg (3), 23.04.2013
1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.d3 Bc5 5.c3 0–0 6.0–0 Re8 7.Re1 a6 8.Ba4 b5 9.Bb3 d6 10.Nbd2 Bb6 11.Nf1 Ne7 12.Ng3 Ng6 13.h3 h6 14.d4 c5 15.dxe5 dxe5 16.Qxd8 Bxd8 17.a4 c4 18.Bc2 Ba5 19.axb5 axb5 20.Be3 Bb7 21.Ra2 Bc7 22.Rea1 Rxa2 23.Rxa2 Ra8 24.Rxa8+ Bxa8 25.Kf1 Ne7 26.Nd2 Kf8 27.Bc5 Nd7 28.Ba3 g6 29.f3 Ke8 30.b3 cxb3 31.Nxb3 Nc8 32.Bd3 Bc6 33.c4 bxc4 34.Bxc4 Ba4 35.Nc5 Nxc5 36.Bxc5 Nb6 37.Bxb6 Bxb6 38.Ne2 Ba5 39.Nc1 Ke7 40.Nd3 Bc3 41.g4 ½–½

10...Be6 11.Nbd2

Was Bxe6 better as suggested by engines. One of the curiosities becoming clear to me through this match is that many average players have great confidence in their ability to comprehend when one side is winning because the engine evaluation exceeds +/-1.00. Although engines are terrific tools that put a lot of information in the hands of even average players, they cannot answer every question. A weak player with a computer may be emboldened to offers arguments that had been the prerogative of masters in an earlier age.*

Knowing how this game developed, I prefer 11.Bxe6 because it shackles Carlsen with the sort of doubled e-pawns that became a defensible weakness in Anand's position a dozen moves later. Anand, however, could not make his decision on the basis of a known outcome. The outcome of the game was not known yet. Results give the analyst an artificial advantage.

Normally, in the Spanish Opening, White likes to keep the light-squared bishop. That might have been a reason to avoid the exchange, but it was not reason enough to prevent Black from making the exchange.

After 11.Bxe6, Black must play 11...fxe6. If 11...Rxe6? 12.d4 exd4 13.cxd4 Bb4 14.Nc3. The tactical ideas that give White a clear advantage after 11...Rxe6 could serve well as instruction for beginning players.

11...h6 12.Bh4 Bxb3 13.axb3 Nb8

White to move

Both players commented on Carlsen's knight maneuvers after the game. Anand said, "Magnus' maneuver with the knight was quite good." Carlsen noted that he had played the Breyer variation a few times, and that maneuver was a common idea.

14.h3 Nbd7 15.Nh2 Qe7 16.Ndf1 Bb6 17.Ne3 Qe6 18.b4 a5 19.bxa5 Bxa5 20.Nhg4 Bb6

White to move

Neither player has a clear advantage and there are no striking imbalances. The position should be well-suited to Anand if he is seeking a draw after losing yesterday. On the other hand, such positions seem to be Carlsen's goal in the opening. Anand, on the other hand, needs a concrete advantage.

21.Bxf6 Nxf6 22.Nxf6+ Qxf6 23.Qg4?!

Black to move

The evaluation of Stockfish 4 drops Anand's position a mere 1/5 of a pawn compared to 23.Qe2, the preferred move. However, the consequence of this move will be a long-term weakness in the doubled pawns on the e-file. Black's incremental advantages do not yet produce a superior position for the challenger, but they do make his position easier to play. Once he finds himself on the defensive, Anand must play precisely. As psychological pressure grows, these moves become more difficult.

23...Bxe3 24.fxe3 Qe7 25.Rf1 c5 26.Kh2 c4 27.d4 Rxa1 28.Rxa1 Qb7 

White to move

Have the players reached an endgame? Most analysts might consider this stage part of the middlegame, but the decisions that each player must make should be grounded in understanding of rook endings and queen endings. Which sort of ending should Anand steer towards here? Is he already playing for a draw?

It seems to me that White has a very difficult job finding anything constructive to do here. Black, on the other hand, seems able to take action to improve his position.

29.Rd1

Is 29.d5 better? Anand has a permanent weakness in the doubled e-pawns. Is this weakness fatal?

29...Qc6 30.Qf5 exd4 31.Rxd4

31.exd4 leaves Black a clear pawn ahead. However, the move played leaves the doubled e-pawns isolated as well. Black can apply pressure and improve his position. White must passively defend the weak pawns, or seek exchanges that leave him in a rook or queen ending down a pawn.

31...Re5 32.Qf3 Qc7 33.Kh1 Qe7 34.Qg4 Kh7 35.Qf4 g6 36.Kh2 Kg7 37.Qf3 Re6

White to move

38.Qg3

Anand chooses to exchange one weakness for another. Rook endings give the side with a deficit in number of pawns the best chance for a draw. Was it possible for Black to make progress if Anand had continued passively defending the e-pawns?

38...Rxe4 39.Qxd6 Rxe3 40.Qxe7 Rxe7

White to move

41.Rd5 Rb7 42.Rd6

The first move that I would have considered here is 42.Kg3. Activate your weakest piece is advice that I've read in several books, and that I teach to young players. My chess engine's initial evaluation favors 42.Kg3, but the longer the engine thinks, the more it favors Anand's move. Perhaps restraining the opponent's king is more important than activating one's own, especially if a draw is the goal.

42...f6 43.h4

I did not like this move at first. Again, Kg3 suggests itself. Initially, Stockfish 4 agrees with me. But, with deeper analysis, it vindicates Anand's choice.


Then, however, three plys deeper, the engine favors 43.Kg3 by 0.04.

Anand is playing well, but he must bear more pressure because only Carlsen has a chance to win this game.

43..Kf7 44.h5 gxh5 45.Rd5 Kg6 46.Kg3

Black to move

46...Rb6 47.Rc5 f5 48.Kh4

Stockfish 4 prefers 48...Kf6 over Carlsen's move by a whole pawn. Neither player matches the computer perfectly, but for Carlsen, there are no dire consequences to slight inaccuracies.

48...Re6 49.Rxb5 Re4+ 50.Kh3

Is 50.Kg3 better?

50...Kg5 51.Rb8 h4 52.Rg8+ Kh5 53.Rf8 Rf4 54.Rc8 Rg4

According to my engine, this move was another slight inaccuracy without consequences. The game remains tilted ever so slightly in Black's favor. 54...Rf1 was the computer's choice.

White to move

55.Rf8 Rg3+ 56.Kh2 Kg5 57.Rg8+ Kf4

White to move

58.Rc8

Anand finds the only move. This one did not seem difficult, however.

58...Ke3 59.Rxc4

Another seemingly obvious only move. The champion is holding on.

59...f4

White to move

60.Ra4?

60.b4 was necessary. Was it easy to comprehend that White's b-pawn must begin its run now? In the press conference, Carlsen stated that 60.b4 was too slow. Both players assessed this position as winning for Black. Carlsen waffled a bit with "probably winning" at first. Carlsen suggested that White's pawns get in the way of the rook.

Removing White's two pawns presents a position that Stockfish 4 sees a dead draw. White's drawing idea was illustrated in Gligoric -- Smyslov, Moscow 1947. The analysis can be found in many endgame books, such as Dvoretsky's Endgame Manual, 2nd ed. (2008). Six years earlier, Smyslov had drawn a similar position against Bondarevsky. See "Play Like Smyslov" and "Rook Endgame: Critical Position."

White to move
Theoretical Position
The stronger side cannot make progress as long as White's rook can harass the Black king.

Among the drawing lines in the actual position in the game is at least one that permits White to promote a pawn.

60.b4 h3 61.gxh3 h5 62.b5 Rg6 63.Rc6 Rg5 64.c4 f3 65.c5 Rg2+ 66.Kh1 Rc2 67.b6 Rb2 68.Rf6 h4 69.Rf5 Rb1 70.Kh2 f2 71.Rf6 f1Q 72.Rxf1 Rxf1 73.c6 Rb1 74.c7 Rxb6 75.c8Q Rb2+ and Black will draw by repetition.

White to move
Theoretical Position
There are several other possibilities after 60.b4. In all of them, Black has the freedom to choose, and White must struggle to find the correct move.

60...h3 61.gxh3 Rg6 62.c4 f3 63.Ra3+ Ke2 64.b4 f2 65.Ra2+ Kf3 66.Ra3+ Kf4 67.Ra8 Rg1 0–1

Magnus Carlsen played a solid game. Viswanathan made one serious error. After the game, neither player correctly identified the error that computer enabled commentators discerned.


*Does anyone care what a USCF Class A player says about the World Championship? My annotations will never offer the sort of expert commentary that is available elsewhere. These annotations do serve to hone my thinking process, and document my journey to chess expertise and possibly eventual mastery. If that journey has interest or instructive value to others, then this blog serves that purpose.

15 November 2013

Carlsen -- Anand 2013, Game 5

Magnus understands chess much better than the commentators ever will.
Damon Smith, Chess.com Forum
Magnus Carlsen won today. He gained an advantage with the White pieces for the first time in this match, employing the Marshall Gambit against the Semi-Slav.* The challenger's advantage out of the opening was that his position was not worse. He also gained a lasting imbalance in the pawn structure that assured it would always remain possible to keep playing.

This World Chess Championship match is developing into one of the most exciting matches in history. Chess enthusiasts around the globe are following the games live. In my time zone that requires either staying awake all through the night or arising just over an hour after midnight. I am not following the openings live, but usually catch the ending. This morning I checked on the game at 3:00 am, saw an equal and unbalanced position, and returned to sleep. When I awoke again much later than my usual time, the game was near the finish and Carlsen had a clear advantage.

I read the commentary on a Chess.com forum that permitted me to observe changing perceptions of the battle as it developed. For much of the game, matters appeared equal. Even the tablebases asserted that the position was drawn at one point, someone reported.** However, Carlsen had won a pawn early in the endgame (or late in the middlegame--such lines are not clearly marked), and this material advantage put Anand under intense pressure.

At least some commentators following the game seemed to think that Carlsen's play with the White pieces offered him too little. However, it was pointed out in the Chess.com forums, "Magnus knows much better than the commentators what he needs to win" (IM Panayotis Frendzas). Mr Smith, who is quoted in my epigraph, later asserted that those were the words he was seeking when he offered his more strident criticism of the commentators.

Magnus Carlsen thrives with a minuscule advantage in a long game. Not only does he have the advantage of youth against Viswanathan Anand, but his style against those his own age is to make them play a long time. Players often will falter when they must find one accurate move after another in an unbalanced, but theoretically equal position. Today, the World Champion faltered.

Carlsen,Magnus (2870) -- Anand,Viswanathan (2775) [D31]
FWCM 2013 Chennai (5), 15.11.2013

1.c4 e6 2.d4 d5 3.Nc3 c6 4.e4

Black to move

Both players employed move order nuances to keep the other guessing, and then Carlsen offered a move that has been played a handful of times before the critical line made its appearance in 1902. Frank Marshall introduced the move 6.Bd2 at Monte Carlo 1902.

4...dxe4 5.Nxe4 Bb4+ 6.Nc3

6.Bd2 gives up the d-pawn, but White often strands the Black king in the center by covering f8 with a bishop. Correspondence players following the percentages would note that the gambit scores 57% for White and is played more than four times as often as the safe line Carlsen chose. The safe line scores 49% for White, well-below average.

For most players, a below average scoring percentage in a safe position serves to deter the adventure. However, White already has a queenside pawn majority and the assurance of a lasting pawn imbalance. Carlsen's opening strategy suits his style.

Black to move

ChessBase Online contains 404 games with this position.

6...c5 7.a3 Ba5 8.Nf3

Carlsen's move scores best, but with only 63 games in the databases, these statistics lack significance. 8.Be3 has been played nearly twice as often (34-18) as Carlsen's choice. 8.dxc5 has been played by the highest rated players who have found themselves in this position: Kiril Georgiev and Alexander Yermolinsky. Yermolinsky has also played 8.Nf3.

8...Nf6

Marshall had the position after move 5 twice in 1902. In one of these, he chose the safe line. Here Anand deviates from the play of Richard Teichmann, Marshall's opponent.

Reference Game:

Marshall,Frank James -- Teichmann,Richard [D31]
London m3 London (5), 1902
1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Nc3 c5 7.a3 Ba5 8.Nf3 cxd4 9.Qxd4 Qxd4 10.Nxd4 Bxc3+ 11.bxc3 a6 12.Bf4 f6 13.Bd6 e5 14.Nc2 Ne7 15.Ne3 Nbc6 16.Nd5 Nxd5 17.cxd5 Ne7 18.c4 Bf5 19.Be2 Kd7 20.Bb4 a5 21.Bxe7 Kxe7 22.0–0 b6 23.f4 exf4 24.Rxf4 Bg6 25.Ra2 Kd6 26.Rb2 Rab8 27.Rf3 Bh5 28.Rfb3 Bxe2 29.Rxe2 Kc5 30.Re4 Rhd8 31.Rb5+ Kd6 32.Re6+ Kc7 33.Rc6+ 1–0

9.Be3

Black to move

Commentators Lawrence Trent and Tania Sachdev grew excited as they learned that fellow commentator Susan Polgar had played this position a number of years ago. Indeed, she has played both sides. In 1992, she had Black against Boris Gulko; the next year, she had White against Lajos Portisch.

Reference Games:

Gulko,Boris F (2560) -- Polgar,Zsuzsa (2530) [D31]
Aruba (2), 1992
1.c4 e6 2.d4 d5 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Nc3 c5 7.a3 Ba5 8.Nf3 Nf6 9.Be3 cxd4 10.Nxd4 Ne4 11.b4 Nxc3 12.Qc2 Bc7 13.Qxc3 Be5 14.f4 Bf6 15.Rd1 0–0 16.Qc2 Qe7 17.Nf3 b6 18.Bd3 g6 19.0–0 Bb7 20.Be4 Rc8 21.Ne5 Bg7 22.c5 bxc5 23.Bxc5 Qc7 24.Bxb7 Qxb7 25.Nc4 Qc6 26.Ne5 Qb7 27.Nc4 Qc6 28.Ne5 ½–½

Polgar,Zsuzsa (2560) -- Portisch,Lajos (2580) [D31]
Budapest zt-B Budapest (8), 1993
1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Nc3 c5 7.Nf3 Nf6 8.a3 Ba5 9.Be3 Nc6 10.dxc5 Bxc3+ 11.bxc3 Qa5 12.Qc2 Ng4 13.Qc1 0–0 14.Be2 Nxe3 15.Qxe3 Ne7 16.0–0 Nf5 17.Qe4 Qxc5 18.Rfd1 f6 19.Bd3 g6 20.h4 Ng7 21.Qd4 Qxd4 22.cxd4 Bd7 23.Be4 Rab8 24.Rab1 Rfc8 25.Bxb7 Rxc4 26.d5 Rc7 27.dxe6 Bxe6 28.Be4 Rxb1 29.Rxb1 Nf5 30.Rb8+ Kf7 31.a4 Nd6 32.Bd3 Rc8 33.Rb4 Rc3 34.Be2 Rb3 35.Rf4 Ke7 36.Nd4 Rb1+ 37.Kh2 Bd7 38.Nc2 a5 39.Bf3 Nf5 40.h5 g5 41.Rc4 Rc1 ½–½


9...Nc6 10.Qd3

For all practical purposes, this move is the game's novelty. It has appeared once prior in a game this past summer. White was untitled, rated slightly over 2000, and lost to a FIDE Master. Their game offers instructive material for class players such as myself reaching towards their level, but would not offer much to Carlsen and Anand preparing for this match.

10...cxd4 11.Nxd4 Ng4 12.0–0–0 Nxe3 13.fxe3

Black to move

Another pawn imbalance has been created: an isolated center pawn. Engine analysis and expert commentary both suggest this position is equal, but there is play. As it turned out, there was a lot of play. Both players battled for advantage and both found the other had excellent resources.

13...Bc7 14.Nxc6 bxc6 15.Qxd8+ Bxd8 16.Be2 Ke7 17.Bf3 Bd7

White to move

Black has the advantage of the bishop pair, but his light-squared bishop is not particularly active. White seems to have more space to maneuver. Both players have isolated pawns. White has a queenside majority; Black has a majority on the kingside. Both kings are near the center.

Readers of Jeremy Silman's books know well that imbalances are the heart of chess strategy. This World Championship match is producing games that improving players will be able to study for years to come.

18.Ne4 Bb6 19.c5 f5!

Anand decided that the bishop pair was not an advantage worth keeping, and even that further pawn weaknesses are preferable to letting Carlsen keep his centralized knight. I can easily imagine many chess coaches scolding their pupils for the sort of moves Anand has made here, and yet Stockfish 4 appears to agree with the World Champion.

General principles must be tempered with concrete analysis. The needs of the position outweigh abstract generalizations.

20.cxb6 fxe4 21.b7 Rab8

White to move

22.Bxe4 Rxb7

Everyone who has watched the film Searching For Bobby Fischer (1993) knows Bruce Pandolfini's instruction to young Josh Waitzkin to count the number of pawn islands. Does this simple technique offer a solid basis for considering Carlsen's position superior?

23.Rhf1

Both of Carlsen's rooks are posted on open files. Is chess really so simple? Chess engines see equality. General principles claim an advantage for White. Engines know only concrete analysis. Humans must calculate as well as possible, steer with general principles where useful, and continue to make moves under the pressure of less and less time left on the clock.

23...Rb5 24.Rf4 g5 25.Rf3 h5 26.Rdf1 Be8 27.Bc2 Rc5

White to move

As I am playing through this game, knowing the end result, it is tempting to seek fault with Anand's moves. Turning on an analysis engine offers another temptation to identify a series of small errors on both sides. But, engines are of limited use in complex strategic positions. This game is headed for a rook ending or a rook and bishop ending. Pawn structure and piece activity are the critical elements.

The clearest difference that I perceive in the game is that Anand seems continually faced with more complex decisions. Here Anand has pinned a bishop, and threatens to pile on with Bg6. White must either prevent this bishop move or step out of the pin.

28.Rf6 h4 29.e4 a5 30.Kd2 Rb5 31.b3 Bh5 32.Kc3 Rc5+ 33.Kb2 Rd8

White to move 

Anand continues to harrass the bishop with the threat of another pin. Carlsen needs only to determine which rook moves to f2.

34.R1f2 Rd4 35.Rh6 Bd1 36.Bb1 Rb5 37.Kc3 c5 38.Rb2 e5 39.Rg6 a4 40.Rxg5

Black to move

Just as he reaches the first time control, Carlsen has won a pawn. Anand restores the material imbalance for a move, and then Carlsen gains another to remain one pawn ahead.

Was this the decisive turning point in the game? It does not seem so, but the material imbalance should mean that Carlsen will continue playing for a win, while Anand seeks a draw. Who bears more psychological pressure?

40...Rxb3+ 41.Rxb3 Bxb3 42.Rxe5+ Kd6 43.Rh5 Rd1 44.e5+ Kd5 45.Bh7 

Black to move

45...Rc1+

My engine suggests 45...Ra1 as the only move here that maintains equality. However, that initial assessment may be misleading. I have heard it said that some masters ignore all computer evaluations of less than half or two-thirds of a pawn. I have observed in prior World Championship games and in my own training, that engine evaluations of 2 1/2 pawns can be off in certain endings. See, for example, my two posts "Anand - Kramnik: Game 7" and "Latent Patterns". Even an A Class player such as myself could see that game was a dead draw, but my chess engine had Anand ahead a full 1.5 pawns.

Was this move the decisive error, or did it come two moves later.

46.Kb2 Rg1 47.Bg8+

Black to move

47...Kc6

My initial analysis suggests that this move was the decisive mistake. Others may disagree, and more analysis than I have done today is necessary to be certain.

47...Kd4 looks promising for White, but after 48.Rxh4 Kd3 49.Bxb3 Rxg2+ 50.Kb1 axb3 the evaluation is equal. On the other hand, White may have improvements over 49.Bxb3.

48.Rh6+ Kd7 49.Bxb3 axb3 50.Kxb3 Rxg2 51.Rxh4 Ke6 52.a4 Kxe5 53.a5 Kd6 54.Rh7 Kd5 55.a6 c4+ 56.Kc3 Ra2 57.a7 Kc5 58.h4 1–0



*Is Marshall Gambit the correct term when White plays 6.Nc3, as did Carlsen today? No pawn was sacrificed.

**I must express skepticism on this point because the number of pieces remaining on the board when Carlsen gained a decisive advantage exceeds the capacity of existing tablebases, and will continue to do so for several more years in the future.