Showing posts with label Lowenthal (Johann Jacob). Show all posts
Showing posts with label Lowenthal (Johann Jacob). Show all posts

06 April 2015

Some Miniatures

Playing Against Steinitz

Wilhelm Steinitz offered a pawn to Serafino Dubois in their game during the London International Chess Congress,  1862. Johann Lowenthal comments in the tournament book that Dubois "was not to be tempted" (The Chess Congress of 1862 [1864], 102). I was less keen to the dangers while I was reviewing Dubois -- Steinitz in the early morning last week and proceeded to play this move against Hiarcs on the iPad. I lost, but not in a manner that confirms the general consensus concerning the dangers.

Dubois -- Steinitz begins:

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc4 4.O-O d6 5.d3 Nf6 6.Bg5?! h6 7.Bh4 g5 8.Bg3

At this point, we have Middle Game Position 168 in GM-RAM: Essential Grandmaster Knowledge (2000) by Rashid Ziyatdinov, which I have been working through since December (see "Game of the Week").

Black to move
GM-RAM Position 168

8...h5!

Steinitz offered a pawn here.

Nineteenth century commentators and Stockfish 6 agree that 9.h4 is best, and that is what Dubois played. ChessBase database has eleven games with 9.Nxg5--all Black wins. The statistics certainly seem grim for snatching the pawn.

The earliest game is Knorre -- Chigorin, St. Petersburg 1874.*

Knorre,Victor -- Chigorin,Mikhail [C50]
St Petersburg, 1874

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.0–0 Nf6 5.d3 d6 6.Bg5 h6 7.Bh4 g5 8.Bg3

Diagram above.

8...h5 9.Nxg5 h4 10.Nxf7 hxg3 11.Nxd8 Bg4 12.Qd2 Nd4

White to move

13.Nc3

There are two games in the ChessBase database with 13.h3. Another game referenced in T.D. Harding and G.S. Botterill, The Italian Game (1977) is absent from this database.

13...Nf3+ 14.gxf3 Bxf3 0–1


Ashley -- Tollit, Birmingham 1923 continues from the diagram with 13.h3

13.h3 Ne2+ 14.Kh1 Rxh3+ 15.gxh3 Bf3# 0-1

This is the game played more recently on at least two occasions (1996 and 2005).

Perhaps, 14.Kh1 is the critical error, however, in this last example. White could have played

14.Qxe2!.

Black to move

After 14...Bxe2 15.Ne6, Black still appears to have an edge, but checkmate no longer seems imminent.

Although the database offers only losses for White after 9.Nxg5, engine analysis of these miniatures and of my play against the iOS version of Hiarcs leaves me wondering whether capturing the offered pawn is a mistake, as asserted by Lowenthal.

James Stripes -- HIARCS [C50]
Spokane, 31.03.2015

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.0–0 d6 5.d3 Nf6 6.Bg5 h6 7.Bh4 g5 8.Bg3 h5 

Position from Dubois -- Steinitz, 1862

9.Nxg5

Black to move

9...Bg4

9...h4 is the critical line in most commentaries. 10.Nxf7 Qe7 11.Nxh8 hxg3 12.Kh1 with an advantage for Black

10.Qd2 Qe7

10...h4

11.Bxf7+ Kd7 12.h4

12.Bh4 might be better.

12...Raf8 13.Bb3

13.Bc4

13...Kc8 14.Nc3 Bb6 15.a4 Bc5

White to move

16.a5

16.Nd5 with a two pawn advantage, I should seek to exchange pieces.

16...Nd4 17.Kh1 Nxb3 18.cxb3 Rhg8

White to move

19.f4

19.a6 may be better, as is 19.f3.

19...Bd7 20.fxe5 dxe5 21.Bf2 Kb8 22.Na4 Bxf2 23.Rxf2 Ng4 24.Rxf8+ Qxf8

White to move

25.Qe2?? Qf4 0–1

Difficult positions provoke errors. On the other hand, a move cannot be deemed an error merely because it invites difficulties. It may be possible to learn to defend such a position. Having an advantage of two pawns often is worth something.


*See Edward Winter, "Confusion," Chess Notes (updated 14 March 2014) for another early instance of this game, and for discussion of problems regarding the game score of Dubois -- Steinitz 1862.

24 February 2015

Initiative

Morphy -- Lowenthal, London 1858

The fourteenth match game between Paul Morphy (1837-1884) and Johann Jacob Lowenthal (1810-1876) is an instructive game that highlights Morphy's positional understanding, which was decades ahead of his time. As Valeri Beim notes, this game is a "treasure even by modern-day standards" (Paul Morphy: A Modern Perspective [2005], 108).

Over the past week, I have played through this game several times. First, I looked through without any assistance and found the zugzwang. Then, I probed the database for some perspective on the opening.* Third, I entered variations that highlight tactical and strategic alternatives. Variations were expanded and contracted as I read through Beim's comments on the game (106-108). Finally, a couple of lines were checked with Stockfish.

Morphy,Paul -- Loewenthal,Johann Jacob [C77]
London m London (14), 21.08.1858

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4

This game was the first one recorded with this sharp line.

5...exd4 6.e5

6.0–0 is also possible, and is vastly more popular.

6...Ne4 7.0–0 Nc5

7...Be7 is also popular.

8.Bxc6

8.Bb3 Nxb3 9.axb3 Be7 10.Re1 0–0 11.Nxd4 Nxd4 12.Qxd4 was drawn in 52 moves in Lochte,T (2165) -- Hiermann,D (2190), Germany 1996.

8...dxc6

8...bxc6 appears twice in the database, played only by relatively weak players (albeit close to my level). Lowenthal's choice to activate the queen must be the correct idea.

9.Nxd4

It is interesting that this position has been reached a few times with White on the move, that is, via a different move order that excludes Bb5-a4.

9...Ne6 10.Nxe6 Bxe6 11.Qe2

Black to move

11...Bc5

"This natural looking move is the root of all Black's troubles" (Beim, 106). He suggests 11...Qd4.

12.Nc3 Qe7 13.Ne4 h6

The first time that I played through this game, this move looked strange. But a few seconds of analysis revealed that it was necessary to prevent Bg5.

13...Bb6 14.Bg5

a) 14...f6? 15.exf6 Qf7 (15...gxf6 16.Bxf6 Qf8 17.Rad1+-) 16.fxg7 Qxg7 17.Bf6+-.

b) 14...Qd7 15.Rad1 Qc8 would be awkward for Black.

14.Be3

"A outstanding positional decision" (Beim, 106). Beim notes that depriving Black of the bishop pair gives White the advantage on the dark squares.

14...Bxe3 15.Qxe3 Bf5

15...0–0–0? 16.Qa7.

15...b6!? 16.f4 0–0–0.

16.Ng3!? 

"Morphy bravely sacrificed a pawn for a small, but lasting initiative" (Beim, 106).

16.f4 Bxe4 17.Qxe4 0–0–0 gives White a slight advantage

16...Bxc2 17.f4

Black to move

17...g6

Alternatives:

a) 17...Bg6? 18.f5 Bh7 and White is clearly better.

b) 17...Bh7!?

c) 17...0–0 18.f5 Qg5 19.Qc3 Ba4 20.e6 with an initiative for White.

d) 17...Qb4 is Stockfish's choice.

18.e6!

White threatens to play 19.Qc3

Hypothetical Position
18...Bf5

I looked at some alternatives to this move.

a) 18...Ba4 is easily refuted. 19.exf7+ Kxf7 20.Qc3 Bb5 21.Rfe1 Qf6 22.Qb3+ Kg7 23.a4.

b) 18...0–0 leads to a maze of complications that mostly seem better for White.
19.Rf2 Bf5 20.Nxf5 gxf5 21.Qb3

b1) 21...b6 22.Re1

b2) 21...fxe6 22.Qxb7 Rfb8 23.Qxc6 Rb6 24.Qc3

b3) 21...Qxe6 22.Qxb7 Qd6 (22...Rfb8 23.Qxc7) 23.Qb3.

c) 18...0–0–0 19.Rac1 Bd3 20.Qa7 Qxe6 21.Rcd1 (21.Rfd1?! Beim points out that this is the wrong rook 21...c5 22.Qa8+ Kd7 [Beim's line continues 23.Rxd3+ Ke7 24.Rxd8 Qe3+–+] But the computer offers 23.Qxb7 when White seems slightly better) 21...Qc4 22.Rf3 with a clear advantage for White.

19.Nxf5 gxf5 20.exf7+ Kxf7 21.Qh3 Qf6

21...Rad8 22.Qxf5+

22.Rae1 Rhe8 23.Re5

Morphy simply puts his rook on a secure square on an open file.

23...Kg6 24.Rfe1 Rxe5 25.Rxe5 Rd8

Lowenthal grabs the other open file for his rook.

26.Qg3+

This check gains a tempo to make possible White's next move.

26...Kh7 27.h3 Rd7

Lowenthal might have held the position with 27...Rd5 28.Re8 Qg7 29.Qh4 Rd1+ 30.Kh2 Rd2 31.Re7 Rxg2+ 32.Kh1 Rg1+=.

28.Qe3 b6 29.Kh2

"Morphy, always energetic, proceeds to straightforwardly strengthen the position, knowing that the necessary level of coordination between his pieces has not yet been attained" (Beim, 107). The italics are Beim's. Throughout Paul Morphy: A Modern Perspective, he emphasizes Morphy's understanding of dynamic play, piece coordination, and development. He contends that focus on Morphy's play against weak opponents has led to a distorted view of his strengths. His play against the top players of the day, including Lowenthal, show that he possessed an intuitive understanding of many concepts that would be articulated over the course of the next century. Morphy anticipated not only Steinitz, but also Nimzovich.

Black to move

29...c5 30.Qe2 Qg6 31.Re6

31.Qxa6?

31...Qg7

31...Qg8! might hold 32.Qe5 Rf7 33.Re8 Qg7 and no White breakthrough is in sight.

31...Qf7? 32.Qe5 c4 33.Re8+-.

32.Qh5 Rd5 33.b3

This is the position that I posted in "Zugzwang!" earlier this week.

33...b5

33...Qf8 34.Qg6+ Kh8 35.Re8+-
33...a5 34.a4 and still zugzwang.

34.Rxa6 Rd6 35.Qxf5+

35.Rxd6 cxd6 36.Qxf5+ Kh8 37.a4 bxa4 38.bxa4 should be winning.

35...Qg6 36.Qxg6+ Kxg6

White to move

37.Ra5

Beim gives a long line that Morphy could have calculated leading to certain victory:

37.Rxd6+ cxd6 38.Kg3 b4 39.Kf3 d5 40.g4 Kf6 41.h4 Ke6 42.h5 Kf6 43.Ke3 Ke6 44.g5 hxg5 45.fxg5 Kf5 46.g6 Kf6 47.Kf4 d4 48.Kg4 Kg7 49.Kg5 d3 50.h6+ Kg8 51.Kf6 d2 52.h7+.

37...Rb6

37...c6 38.a4 bxa4 39.Rxa4 Rd3
(39...Rd4 40.Rxd4 cxd4 41.Kg3 h5 42.h4 c5 43.Kf3 Kf5 44.g3 Kf6 45.Ke4 Ke6 46.b4+-)
40.Rc4+-.

38.g4 c6 39.Kg3 h5 40.Ra7 hxg4 41.hxg4 Kf6 42.f5 Ke5 43.Re7+ Kd6 44.f6 Rb8 45.g5 Rf8 46.Kf4 c4 47.bxc4 bxc4

White to move

48.Kf5 c3 49.Re3 Ra8 50.Rd3+ Kc7 51.Rxc3 1–0

I will need to go through this game again and again. I may return to it in a few weeks or months.

Tomorrow morning, I begin a week on Barnes -- Morphy, London 1858, first match game.


*I was able to spend a few minutes discussing the first few opening moves with FM Jim Maki, who has recently moved to our area and offers game analysis to youth players at area scholastic tournaments. I direct these tournaments. For the first few minutes each round, before any games finish, Jim and I get a few minutes to talk. Then children arrive with their notated games to get superb instruction and a raffle ticket.

19 February 2015

Zugzwang!

Black is ahead one pawn and has everything defended against White's threats. There is just one problem. Black must move. Every possible move produces weaknesses.

Black to move

From Morphy -- Lowenthal, London 1858.

Two moves later, White was ahead a pawn.

26 November 2013

Morphy Defense: Early History

The Morphy Defense to the Spanish Opening is more popular than all other Black third moves combined. 3...a6 accounts for nearly 71% of the more than 335,000 Spanish Opening games in the ChessBase Online database. The immediate attack on the Spanish bishop with this pawn move did not originate with Paul Morphy, but owes its initial popularity to his taking it up, according to David Hooper and Kenneth Whyld, The Oxford Companion to Chess (1996), 264.

In 1858, Morphy faced this move once against Johann Jacob Lowenthal before playing it twice in his match with Adolf Anderssen. He also played the move in games against Thomas Barnes and Jules Arnous de Riviere. Morphy would have been familiar with this move before his trip to Europe because it had been played by Charles Henry Stanley against Eugene Rousseau in the match in New Orleans in 1845.

The move 3...a6 in the Spanish first appears in the writing of Domenico Ercole del Rio (1750). His brief work was absorbed in a longer work by Giambatista Lolli (1763). Lolli's version then served as the basis for part of John Cochran, A Treatise on the Game of Chess (London, 1822). Cochran's Treatise point out that Ruy Lopez had suggested 3.Bb5 as a refutation of 2...Nc6, preferring to defend the pawn with 2...d6 and then offers, "how far he has succeeded in proving the move to be bad, the reader may judge by this game and the following Variation" (162).

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.Nxe5 Qd4

White to move
6.Ng4

This move is asserted by del Rio to be best.

6...Bxg4 7.Qxg4 Nf6

And the second player has "by no means an inferior game" (162).

In the variation, 3...Bc5 is offered instead of 3...a6. After a few moves, Black's position is equal or better in the lines given.

24 November 2013

The Berlin Defense: History

The Berlin Defense (ECO C65-C67) in the Spanish Opening (or Ruy Lopez) is a major alternative to the more common Morphy Defense. It was popular in the nineteenth century, but passed out of favor in the early twentieth. Fifty years ago, the Berlin was described as "fundamentally too passive" (Leonard Barden, The Ruy Lopez [1963], 145). Even so, the opening had adherents, such as GM Arthur Bisguier.

Vladimir Kramnik's use of the Berlin Defense in his World Championship match with Garry Kasparov revived the opening. It has retaken its position as an important opening played regularly in top tournaments. It appeared in four of the ten games in the 2013 World Championship. Magnus Carlsen employed it three times, and Viswanathan Anand played it once. Although the opening has a reputation for being drawish, it often creates imbalances that allow either side to play for an advantage long into the endgame. Carlsen scored one of his victories in the match when Anand faltered in a long and difficult endgame that began with the Berlin Defense.

The opening's name stems from it having been recommended in Handbuch des Schachspiels (Berlin 1843), edited by Tassilo von Heydebrand und der Lasa and Paul Rudolph von Bilguer. Bilguer began the project, but died before bringing it to publication. Lasa completed the project and continued updating it through four more editions (1852, 1858, 1864, 1874). The so-called Morphy Defense (3...a6) does not appear in the first edition of the Handbuch, but is treated in the 1852 edition, where Lasa asserts the superiority of 3...Nf6.
Dieser Zug, welchen der Anonimo Modenese angiebt, kann sehr gut geschehen. Hätte Weiss aber die Absicht, sogleich Sc6 zu nehmen, so würde Schwarz durch 3.Sg8 nach f6 statt a7-a6 dann wegen des Angriffs auf e4 noch etwas besser entwickelt sein.
Tassilo von der Lasa, Handbuch (1852), 162.*
The Ruy Lopez opening received its name from the Handbuch des Schachspiels using the term, "The Knight's Game of Ruy Lopez," according to Howard Staunton (The Chess-Player's Handbook [1847], 147).

The Berlin Defense was considered a standard response to the Spanish in 1889 when Wilhelm Steinitz advocated the system (3...d6) that would come to bear his name (Steinitz, The Modern Chess Instructor [1889], 1). There, the Morphy Defense (3...a6) was considered an alternate main line. Johann Jacob Lowenthal, however, asserted two decades earlier that Morphy's move is "generally considered best" (The Chess Player's Magazine, vol. 1, New Series [1865], 45). According to Lowenthal, Domenico Ercole del Rio had first suggested the move that became associated with Morphy following his match with Adolf Anderssen.

Lowenthal's assessment differs from that of Max Lange a mere five years earlier. Lange wrote in Paul Morphy: A Sketch from the Chess World, trans. Ernest Falkbeer (1860) that 3...Nf6 "would be stronger" than Morphy's 3...a6, as played in games two and four of his match with Anderssen. White's bishop is "well placed" at a4 and "if Black, in order to dislodge him, should venture upon advancing the [b-pawn], the queen's side will be exposed" (256). Lange refers his readers to "elaborate analysis" in Sammlung neuer Schachpartien (1857).

There Lange offers the history that Ruy Lopez de Segura recommends 3.Bb5 against the knight's defense of the pawn on e5, which the clergyman considered better protected by the pawn move 2...d6. Lange explains that the opening is called the Spanish Game or Ruy Lopez due to this analysis offered by the priest in 1561. His reasoning does not match the Spanish master's, he notes. Rather, he asserts that Black's efforts to drive away the bishop allow it to take up residence on b3 with no loss of time, while also weakening Black's queenside. However, the recommendation of the Berlin School offers Black compensation (43-44).
Die allgemeine Theorie ist aber spater jenem Rathe des spanischen Meisters nicht vollkommen beigetreten; sie hat vielmehr nach Aufrechterhaltung der Vertheidigung 2. Sb8 — c6 nun bei 3. Lfl — b5 durch die von der Berliner Schule vorgeschlagene Entgegnung 3. Sg8 — f6 die Spiele schnell auszugleichen empfohlen.
Lange, Sammlung neuer Schachpartien (1857), 43
The importance of the Spanish Opening is revealed, Lange asserts, in the attention it receives from Tassilo von der Lasa, Carl Friedrich Jaenisch, and Howard Staunton.


Lasker's Advocacy
Truth derives its strength not so much from itself as from the brilliant contrast it makes with what is only apparently true.
Emanuel Lasker, Common Sense in Chess (1917), 25
The Morphy Defense first surpassed the Berlin system in popularity, according to the ChessBase database, in the 1870s.** However, they remained close to equal through the 1880s and 1890s, and then in the first decade of the twentieth century, the Morphy variation was played three times as often as the Berlin. In the next decade, 3...a6 appeared five times as often as 3...Nf6.

The Berlin Defense to the Spanish Opening had reached it peak of popularity, while the Morphy Defense dramatically increased its adherents at the same time that Emanuel Lasker presented his lectures that would be published as Common Sense in Chess. The lectures were presented in spring 1895 and the first edition of the book appeared in 1896. After several editions by several publishers, a corrected edition was published by David McKay in 1917. That edition was reprinted as a cheap Dover paperback in 1965 that remains widely available today.

Lasker's central purpose in the lectures and book were to lay out general principles for all phases of the game. His opening principles are put forth in "Lasker's Rules". These conclude the first lecture. In the second lecture, he offered two games and variations that illustrate these rules at work in the Spanish Opening. In the third lecture, he offered some discussion of the Morphy Defense, which he notes at the outset violates one of his opening principles. The Berlin Defense conforms to Lasker's rules.

In his first illustrative game in the second lecture, we have the moves 1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.Re1 Nd6

White to move

Lasker observes of 5.Re1, "[n]ot the best move, but one that most naturally suggests itself" (19). Nonetheless, Carlsen played this very move in game 8 of his match with Anand. That game followed a line that had been employed in the first official match for the World Championship in 1886, deviating only with 12...Ne8.

Lasker's continuation from the diagram has been rare (24 games in ChessBase Online).

6.Nc3

6.Nxe5 is the overwhelmingly most popular choice, followed by 6.Bxc6 in roughly one-quarter of the games.

6...Nxb5 7.Nxe5

"Cunning play." Lasker observes, "If Black now takes one of the knights he loses" (19).

Lasker presents some lines after 7...Nxc3 in which White either gains a piece or generates a mating attack against the king. These seem useful instruction for developing players. In his main line, after 7...Be7, Black ends up with a better game.
And Black's game is, if anything, preferable. You see how quickly White's attack has spent itself out. But then he did not make the best of his position at move 5.
Lasker, Common Sense, 21
Lasker returns to the main line after 4.O-O Nxe4, offering what remains today White's most popular move.

5.d4

Black to move

Here, 5...Nd6 has become Black's most popular response. Lasker continued with 5...Be7, the second most popular move today.

6.Qe2 Nd6 7.Bxc6 bxc6 8.dxe5 Nb7

After 5...Be7, the rest of Lasker's moves remain the top choices in this line.

White to move

Lasker's comments on the diagram ring true today:
We have no come to a critical stage. Black's pieces have retired into safety, ready, with one single move, to occupy points of importance. White, on the contrary, has the field to himself, but he can do nothing for the present, as there is no tangible object of attack. Various attempts have been made to show that White has here the superior position. I do not believe that White has any advantage, and am rather inclined to attribute the greater vitality to the party that has kept its forces a little back. (23)
The Berlin Defense offers several prospects for interesting and dynamic play. It can produce a tactical melee, a positional squeeze, or a cold and lifeless position that leads to an early draw. I was happy to see several variations of this old and new opening system deployed in the recently completed World Championship match.



*I received assistance translating this passage from a member of Chess.com, hauntedgarage2000. He offered: "This move, described by Anonimo Robenese, could possibly occur. But if White would take Nc6 immediately, Black then will be a bit better developed with 3. Ng8 to f6 instead a7 to a6 because of his threat towards e4." Another member of the site, Kevin Hermann, helped by translating a passage from the 1843 text.

Corrections to my transcription to this passage were made 27 November 2013. Thanks to additional help from McHeath on Chess.com for pointing out four spelling errors. In addition, Anonimo Robenese should be Anonimo Modenese, a name associated with Domenico Ercole del Rio (see also "Morphy Defense: Early History").

**The more time that I spend reading nineteenth century chess books and periodicals, the more I realize that ChessBase and other electronic databases are woefully incomplete as historical references. Aside from the most highly publicized matches and tournaments, and the records of the best known players, the games in nineteenth century publications are mostly absent from databases.

14 April 2013

Smith-Morra Gambit Prehistory

When Johann Jacob Löwenthal took over editorship of The Chess Player's Magazine in 1865, he expressed his intent to "devote considerable space" to opening theory.
While endeavouring to systematize as far as possible those openings which have already been brought before the public, I shall submit to a searching analysis several others which have not yet found their way into print. The analysis of new methods of attack and defense will probably engage the attention of Chess players for an unlimited period. The Chess Player's Magazine (1865), 2-3
The first game presented offers an early version of what would come to be called the Smith-Morra Gambit, albeit with a slightly different move order. The game does not appear in the ChessBase database.

The player of the White pieces is presented as Mr. Calthorp (errata in the front of the volume notes the correct spelling should be Calthrop). Is he Samuel Robert Calthrop who played in the First American Chess Congress? Louis Paulsen eliminated Calthrop in the first round of that event, and these three games are the only games by any player named Calthrop in the ChessBase database. Perhaps it is notable that Calthrop played an early version of the Grand Prix Attack (also ECO B 21) in the third game of the match with Paulsen.

Samuel Robert Calthrop ran a boy's school in Bridgeport, Connecticut, and was originally from England. It is possible that he might have made a trip back to the mother country and played a few games of chess while there. On the other hand, perhaps he had a relative who was also a chess player with a knack for offbeat lines against the Sicilian Defense.

Here is the game with Löwenthal's annotations. I have converted English descriptive to algebraic, but otherwise reproduced the annotations as they appear in The Chess Player's Magazine (1865), 9-11.

Calthrop, [Samuel Robert?] -- Kennedy, Hugh Alexander [B21]
1864?
[ Löwenthal]

The following Sicilian Opening, adopted by so accomplished a veteran as Captain H. A. Kennedy, constitutes a good specimen of this début.

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Bc4

The move generally played here is 4.Nxd4.

4...e6 5.c3

This move, which contributes so important and interesting a variation in the Scotch Gambit, and which may be safely adopted in that opening, is not so good in this début, as Black may, without disadvantage, take the Pawn with Pawn. White would gain no advantage by bringing his Queen's Knight into play, as Black's Pawns form a perfectly safe entrenchment against any attack.

5...dxc3 6.Nxc3 Bc5 7.0–0 d6 8.Be3 Nf6

Exchanging Bishops would have considerably weakened the Queen's Pawn, which could not be maintained against the attacking forces White could bring to bear.

9.Bxc5

9.e5 appears to be more attacking, and leads to some interesting variations.

9...dxc5 10.Qc2 0–0 11.e5 Ng4 12.Rad1 Qe7 13.Rfe1 a6 14.h3 Nh6 15.Ne4 b5 16.Nfg5

Threatening Mate in two moves by playing Nf6+, &c.

16...Nf5 17.Bd3 Nxe5 18.f4 Nxd3 19.Qxd3 c4 20.Qc2 g6 21.g4 Ng7 22.Qf2 h6 23.Qh4

An interesting position (see Diagram).

23...h5

It is obvious that taking the proffered Knight would have involved the immediate loss of the game.

24.gxh5 Nxh5 25.Ng3 Qc5+

The correct move, by which Black is enabled to escape danger.

26.Kf1

The only move, for if 26.Kh1 Bb7+ and wins, or 26.Kh2 Qf2+ and wins.

26...Nxg3+ 27.Qxg3 Kg7 28.Qc3+ Kg8

Had Blck interposed the Pawn, White would have taken e-pawn with Rook.

29.Ne4 b4

Very well played, forcing White to abandon the diagonal, commanded by his Queen.

30.Nf6+ Kh8 31.Qg3 Kg7 32.Re5 Qe7 33.Nh5+ Kh6 34.f5

White has exhausted all his resources.

34. Rd5, an apparently good move, would not have led to any advantage; Black would have replied with f5, rendering his game perfectly safe.

34...gxh5 35.h4 Qf6 36.Qf4+ Kh7 37.Rd2 exf5 38.Rg2 Rg8 39.Rxg8 Kxg8 40.Re8+ Kg7 41.Qg3+ Kh7 42.Qf3 Qxh4 43.Qxa8

White might, perhaps, have done better to take Rxc8, but even in that case Black would have won by numerical superiority of the Pawns.

43...Qf4+ 44.Kg1 Qc1+ 45.Kf2 Qxb2+ 46.Re2 Qd4+ 47.Kf1 Qd1+ 48.Re1 Qd3+ 49.Re2 Be6 50.Qxa6 f4 51.Qc6 f3 52.Qe4+ Bf5 53.Qxd3 Bxd3 0–1

28 November 2012

Lesson of the Week

Paul Morphy found the correct move after Johann Jacob Loewenthal blundered. This game is not a strong example of Morphy's play, but reveals that he sometimes groped through the darkness. In the end, however, Black's failure to attend to king safety led to his defeat.

In the Wednesday and Thursday classes, I plan to do as I did in the Tuesday classes. The second diagram will be on the demonstration board. In order to offer a solution, students need a ticket: completion of the nine problems on the worksheet Beginning Tactics 7. These "beginning" problems are growing more challenging. Several problems in Beginning Tactics 7 employ the tactic of removing the guard. There are forks, too, a skewer, and a forced checkmate in two using an X-ray.


Morphy,Paul - Loewenthal,Johann Jacob [C43]
London 1858

1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.e5 Ne4 5.Bd3 d5 6.Nxd4 c5 7.Ne2 Nc6 8.f3 Ng5 9.f4 Ne6 10.0–0 Qb6 11.Kh1 Be7 12.Nbc3 Nc7 13.b3 Nb4 14.Ng3 Nxd3 15.Qxd3 Qc6 16.f5 g6 17.Bf4 Bxf5 18.Nxf5 gxf5 19.Qxf5 Qg6 20.Bg3 h5 21.Qxg6 fxg6

White to move

22.e6

Morphy offers a pawn that Black should have refused. Advancing the pawn also creates a discovered attack on the knight.

22...Nxe6??

22...0–0–0 would have maintained equality.

23.Rae1 Rf8??

Another Black blunder, and now White has exactly one winning move.

White to move

24.Rxf8+ Nxf8 25.Nxd5 1–0

Had Loewenthal played on, the game might have continued 25...0–0–0 26.Nxe7+ Kd7 27.Rd1+! Kxe7 28.Bh4+ only move Kf7 29.Rxd8 and White is ahead a rook.


Beginning Tactics 7 (sample)

Find the correct move for White in each diagram.










Update 22 March 2017: All of the beginning tactics exercises and solutions can be purchased for viewing on Kindle readers. https://www.amazon.com/dp/B06XKG1VZD