Showing posts with label Slav Defense. Show all posts
Showing posts with label Slav Defense. Show all posts

28 December 2024

Down a Rabbit Hole

My plans to race through 300 chess positions in 60 days took a detour this morning. At 5:50 am, I started the coffee and opened 300 Most Important Chess Positions to number 6. My study of this position did not cease until 8:00 am.

Although this position, like those from Paul Morphy’s games that I looked at yesterday, is one I’ve examined in previous partial readings of Thomas Engqvist’s book, today it raised questions that kept me hunting for more.

The position arose after Black on move 4 brings the bishop to f5, “(too) early”, Willy Hendriks wrote in The Ink War: Romanticism versus Modernity in Chess (2022), 338. Hendricks speculates that William Steinitz may have expected 5.c5, similar to game one via a different move order. But Johannes Zukertort sought to punish the inaccuracy with 5.cxd5 and Steinitz soon brought the bishop back to its starting square.

As late as 2011, Cyrus Lakdawala in The Slav: Move by Move asserted that 4…Bf5, the Reversed London, was unplayable after 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 because of the problems Black faced in Zukertort — Steinitz, New York 1886, the fifth game of the first official world championship. Lakdawala notes, "Black experiences difficulties defending both b7 and d5." He offers four options and concludes that 6...Bc8 is best.

But, no less than three high level games were played in 2012 with a move that Lakdawala did not mention. With this “revolutionary improvement” that Engqvist presents vie Wojtaszek — Wang Yue, White’s queen snatches a pawn and then gets driven back to its starting square. “Black has good compensation since he is ahead in development and has seized the initiative” (16).
While taking the first sip of yesterday’s microwaved coffee (before the fresh pot of French press was ready), I decided correctly on Black’s initial move from the position, but then found the errors in the first line that I considered to chase the queen back. In both the line I began with and the one played by Wang Yue and other masters, the bishop retreats from f5.

5.cxd5 cxd5 6.Qb3

Position 6 in Engqvist

6…Nc6!

This move is the improvement over the old main line, 6…Bc8.

7.Qxb7 Bd7

7…Na5, which I considered first, has not been played, but not by masters. I saw 8.Bb5+ Bd7 9.Bxd7+ Nxd7 10.Qxd5 and it is clear that dropping two pawns was not Black’s idea.

8.Qb3 Rb8 9.Qd1 e5!

White to move

This is where Engqvist’s analysis ends. I could have stopped there, but the sequence leading to the position first grabbed my interest, then the lines played prior to 2012 sent me searching through books and databases. During two hours, I explored the opening tree and several games on chessgames.com, utilized the ChessBase iPad app, and then turned on my computer where I have three ebooks on the Slav Defense resident within ChessBase.

I looked at several games with the bishop retreating to c8. I explored move order nuances reaching the initial position. There is much to learn even though the basic concept Engqvist wants the reader to see is simple: through a somewhat logical developing move in what seems a difficult position, Black sacrificed a pawn for the initiative.

Wojtaszek — Wang Yue was played in October 2012. In May, Sabino Brunello was the first to play Black’s idea. In the Italian Team Championship, Black got a lasting initiative and prevailed through a tactical melee against Csaba Horvath. John Shaw also played Black’s idea in August at the Istanbul Olympiad against Luc Winants. Wang Yue was at that event.

The other four positions that I hope to examine today are all among those I have examined in the past. I recall that one or two of the others have also sent me down some rabbit holes. There is wisdomn in Engqvist's suggestion that the reader study five positions per week, rather than race through the book the way I am struggling to achieve.

03 April 2021

Lasker -- Capablanca, Game 8

Part 13 of a series recognizing the Centennial of Capablanca -- Lasker, World Chess Championship, Havana 1921

The table of dates, openings, and move times in José Raúl Capablanca, World's Championship Matches, 1921 and 1927 (Dover 1977) states that this game was played over two nights on 3 and 4 April 1921. However the notes presented by Capablanca undermine this information, consisting only of the 30 moves played on 3 April. American Chess Bulletin (April 1921) has a 31st move for Lasker, a single date, and interesting notes by Basil Soldatenkov.

These notes take the form of a narrative of the game played, identification of 31.Ke1 as a sealed move, and a fantasy variation carried out to move 56 that begins with an alternative to 31.Ke1. Soldatenkov suggests that Lasker was not feeling well on the second night.

Who was Basil Soldatenkov? His interesting narrative on the game sent me searching for information.

ChessBase Mega 2020 has two games played by Vasily Soldatenkov. American Chess Bulletin (November 1917) in "Ending Between Russian Diplomats" (224) mentions Basil Soldatencov (note spelling) as a new member of the Manhattan Chess Club, indicating that he is attached to the Russian Embassy in Washington. Later in ACB (March 1918) the magazine spells his name Soldatenkoff. Edward Winter reproduced the article with the ending, and much else, in "Soldatenkov" Chess Notes (updated 30 December 2018). From the scraps of information that Winter assembled, a fair bit about the man comes to light, including two divorces, one after a marriage of less than ten years to an American woman 17 years younger than him.

Although Soldatenkov mentions the aborted resumption of this game "the next day" and Capablanca states, "having analyzed the game during the twenty-four hours' interval," Monday was ordinarily a rest day. Lasker used Mondays to produce his dispatches to an Amsterdam paper. There was a dispatch dated 4 April 1921 about which I will say more tomorrow.

In his summary of Lasker's activities during the match, Hartwig Cassel stated:
[Lasker] actually saw fit to engage in newspaper work, having contracted with two European papers to furnish the scores of the games, together with analytical work, and every Monday, when the players had an off day, he had to sit down for hours to come up to his contract. Will chess players, or, rather, masters, never learn the lesson that there is enough work to do, when having to play chess with strong opponents, that they should shun newspaper work and leave it to men who do that work exclusively?
This statement from an interview with Cassel was presented in "The Gratitude of Cuba," American Chess Bulletin (May 1921), 99-101. The previous page contains the "The Summary"--the table of dates, openings, results, and move times--exactly as it would reappear in Capablanca's book on the match.

Was Monday always a rest day? If so, it would seem that the players may have sat down to resume game eight on Tuesday, 5 April, and quickly agreed to a draw without making further moves. That notion accords with the dating of game nine as having been played on 6 April 1921.

The comments by Soldatenkov form a narrative that follows the game score in American Chess Bulletin, and conclude with the Russian's fantasy variation that he presents in support of his contention that Lasker had a superior position when a draw was agreed. I have broken up his narrative and inserted most of it in shorter fragments at appropriate moments in the game.

Lasker,Emanuel -- Capablanca,José Raúl [D12]
World Championship 12th Havana (8), 03.04.1921
[Capablanca/Lasker/Soldatenkov]

1.d4 d5 2.Nf3 Nf6 3.c4 c6

"That works too" (Lasker).

Capablanca's choice is the most popular today in the position and is regarded as a solid response to the Queen's Gambit.

4.e3

"This allows Black to bring out the Queen's Bishop without any difficulty" (Capablanca).

"Too tame!" (Lasker)

"4.Nc3 is more aggressive. 4...Bf5 This move would not be possible now, because then 5.cxd5 cxd5 6.Qb3 would run into trouble for Black" (Lasker).

4...Bf5 5.Nc3 e6 6.Bd3

6.Nh4 is more often the choice of masters today.

6...Bxd3 7.Qxd3 Nbd7 8.0-0

Black to move
8...Bd6

8...Be7 or Bb4 both seem preferable.

9.e4 dxe4 10.Nxe4 Nxe4 11.Qxe4 0-0

Everything so far looks akin to many of my own games with the Queen's Gambit, and these often continue 11...Nf6 12.Qe2

White to move
12.Bd2

12.Bg5 was played in nearly half of the 57 games in PowerBook 2020 that reached this position.

12...Qf6 13.Rad1

Only one other game in Mega 2020 has 12...Qf6. That game, played in 1999, continued with 13.Bc3.

13...Qg6

"Dr. Lasker compelled his opponent to an exchange of Queens and, in its early stage, the game assumed the character of an endgame" (Soldatenkov).

I do not see from the game score how Lasker compelled the exchange of queens. Rather, it seems to me that exchanging queens was Capablanca's intent with 12...Qf6.

14.Qxg6 hxg6 15.Bc3 Rfd8 16.Rfe1 Bc7

A literal translation of Lasker's words here read strangely. His point appears that he considers this position likely to reach a draw with best play. "Die Partie ist bei richtigem Spiele natürlich unentschieden" (Lasker).

White to move
17.Kf1 Nf8

"Thereupon took place highly strategical maneuvering,..." (Soldatenkov).

18.Bd2 f6 19.h4 Kf7 20.g3

"...in the course of which Dr. Lasker, after having insured his right wing against all possible attempts of his adversary,..." (Soldatenkov).

I tell students that they should refrain from placing ellipses at the beginning and end of a quotation. I violate this prescription here, because I want my readers to perceive the continuity in the comments I have placed at moves 17, 20, and 21.

20...Nd7 21.Be3

"...began a pressure on the Queen's side and, as it seemed, almost inadvertently to his opponent, obtained a distinct preponderance of pawn position there and then" (Soldatenkov).

Black to move
21...Nb6

"To this plan of campaign the Pan-American champion opposed a steadfast resistance and his maneuvering of the knight, which threatened to bring into play a combination of pawn and rook at various parts of the enemy's center, was not only purely defensive, but also aggressive at times. However, Capablanca did not succeed in breaking through anywhere ..." (Soldatenkov).

22.Rc1 Nc8 23.Re2 Ne7

All these maneuvers with the Knight are extremely difficult to explain fully. The student would do well to carefully analyze them. Black's position might now be said to be unassailable.

A poster on chessgames.com stated in response to this annotation: "Well I would...if I was positive Capablanca wasn't pulling my leg" (Petrocephalon, 17 Nov 2005).

24.Rc3 a6

"Black prepares b7-b5 to occupy c4 and win the point d5" (Lasker).

25.a4 Rab8 26.b4

Black to move
"White now threatens b5" (Lasker).

26...b5

"Best. Black wins rule over d5, White receives a strong passed pawn as compensation" (Lasker).

"26...Bd6 was better, as it gave Black some slight winning chances" (Capablanca).

27.cxb5 axb5 28.a5

"Dr. Lasker proceeded to gain advantage until, finally, he emerged with a passed pawn on the a-file, with only a slight pressure by his valorous opponent on his b-pawn to compensate the latter for said disadvantage" (Soldatenkov).

28...Bd6 29.Rb3 Nd5 30.Bd2 Rdc8 ½-½

Lasker 2:07 - Capablanca 1:48

"The game was given up for a draw, because having analyzed the game during the twenty-four hours' interval, we both came to the conclusion that it was impossible to win the game for either side" (Capablanca).

White to move
Adjourned/Final Position

It is noteworthy, perhaps, that neither Lasker's nor Capablanca's books on the match offer Lasker's sealed 31st move. The agreement that it was thus drawn after move 30, and Capablanca's comment suggests that they may have chatted before sitting at the board and agreed not to continue.

Soldatenkov's narrative describes the scene in the playing room, and the response of spectators. Who was his source?

Soldatenkov's Fantasy Variation

Soldatenkov wrote:
"The game was adjourned here, Lasker sealing his thirty-first move. I have strong grounds to believe that the Cuban master did not consider himself at his best that day and viewed the whole line of aggressive defense as a distinct, if imperceptible blunder, and his position at that stage of the game was was very inferior."

"The next day the game was resumed. Lasker's sealed move was 31.Ke1. A draw was agreed upon to the utmost astonishment of all, and I dare say, the amusement of Capablanca, who, I am sure, had he the White pieces, with his thorough knowledge of end games, his sporting and combative spirit, would have played it out to a finish and most probably won. However, Dr. Lasker, not feeling very fit and thus wanting to avoid heavy strain, consented to a draw!"

"Although I can not pretend to give an exhaustive of this intricate position, yet I will try to indicate for the benefit of readers of the Bulletin a tentative line of play the game might have followed and which, to my mind, clearly indicates how threatening and aggressive the position of the White pieces is, owing to the overhanging sword of Damocles, which White's a-pawn happens to be:"
31.g4

Naturally, the game could not have resumed with a move that differs from the one that Lasker sealed.

31...Re8 32.g5

Black to move
Analysis Diagram
32...e5

Of course, this move is a blunder, which I would not expect from Capablanca. The whole fantasy variation rests on unsound play by Black.

33.dxe5 fxe5 34.Re4

Soldatenkov also offers 34.Ne1 e4 35.f3

34...Re7 35.Ne1 Rh8 36.Nd3 Ke6 37.Rb1 Kf5 38.Rbe1 Bb8 39.Kg2 Bd6 40.Kf3 Bb8 41.Bc1 Nc3 42.Rf4+ exf4 43.Rxe7 Rxh4 44.Nxf4 Bxf4 45.Rf7+ Ke6 46.Rxf4 Rh3+ 47.Kg4 Rd3 48.Bb2 Nd5 49.Re4+ Kf7 50.a6 Rd2 51.a7 Nc7 52.Bxg7 Rxf2 53.Bf6 Na8 54.Re7+ Kf8 55.Rh7 Nb6 56.Bd4 and White is winning.

09 September 2018

Attack with Simple Moves

The past two days I have been going through games and analysis in Mihail Marin's column in Chess Informant 136, "Attack with Simple Moves" (47-58). The 1967 game Portisch -- Petrosian, in particular, captured my interest.

Portisch,Lajos -- Petrosian,Tigran V [D13]
Moscow 3/584, 1967

1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nf6 5.Nf3 Nc6 6.Bf4 e6 7.e3 Bd6 8.Bg3 0–0 9.Bd3 Re8 10.Ne5 Bxe5 11.dxe5 Nd7 12.f4

Black to move

12...Qb6

Mikhail Yudovich, who annotated the game for Informant 3, gave this move a question mark. Marin adds, "A curious 'pawn grabbing based' plan with incomplete development" (53). Curiously, the diagram position has occurred in at least 18 games (Portisch -- Petrosian was the second) and 12...Qb6 has been played in 13 of these.

In the one previous game, Max Euwe won from the Black side in 20 moves after 13.Qe2. But White has a healthy 65% score over the 13 game batch.

13.0–0 Qxe3+

Yudovich recommends 13...Nc5, which still remains unplayed in subsequent games.

14.Kh1 Qb6

After 14...a6, Black went on to win in Stobik,D. -- Hoffmann,H., Germany 1977, and also in Pira,D. -- Van Rompu,A., France 2008.

White to move

15.Qh5

15.Nb5 was played in the only other game to reach this position, and Black won, Dreyer,M. -- Mohammad,S., Yerevan 1996.

15...Nf8

Marin offers two alternatives: 15...h6 and 15...g6. My computer suggests that 15...g6 is Black's only hope for eqauality.

16.Rf3 Ng6 17.Bf2 Qd8 18.Nb5

Marin notes Black's "chronic weaknesses" (54). This position is the sort that I am always in search of to present to my students for illustrating the consequences of pieces that are mere spectators. All of White's pieces are in the battle on the kingside, or will be soon. Most of Black's pieces are doing nothing.

18...Nce7 19.Nd6 Bd7

White to move

20.Bh4

20.Nxe8 wins the exchange, but gives Black time to bring the rest of his pieces into the game. It is a grave error to exchange a strong attacking piece for a spectator.

20...Qb6 21.Rh3 h6 22.Bf6 Qxb2 23.Rf1 Nf5 24.Bxf5 1–0

Checkmate comes soon.