18 October 2019

Annotated Game #224: Play on both sides of the board in the Dutch

This final-round game in the Stonewall Dutch features highly entertaining, if not particularly accurate, play. The main battleground is the kingside and the f-file, largely due to White's strategic choices. I do quite well out of this as Black and by move 18 have a decisive advantage built up on the board. This is also the point where I start missing chances to dominate on the queenside as well, focusing solely on kingside play.

The Dutch (in its various forms) often possesses this strategic tension, in which Black needs to properly evaluate if/when to switch to queenside play, or (in the Stonewall especially) when to dissolve the central pawn structure to obtain an advantage (see move 24). These kinds of decisions I expect will become easier with more experience; the below was only my third tournament game with a Stonewall.

In the game, I come late to the party on the queenside and take a kind of caveman approach to it, which results in my opponent getting a dangerous, then what should be a winning, attack on the kingside. Nevertheless, I don't give up, find a key defensive exchange sacrifice, distract my opponent with active defense, and at the end of a long, exhausting battle play a queen fork that ends the game.

I'll follow up in a later post with some reflections on the overall lessons learned from this tournament and the previous one, which when combined led me to break through the Class A ratings barrier.

[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Class A"] [Black "ChessAdmin"] [Result "0-1"] [ECO "A85"] [Annotator "ChessAdmin/Komodo 11.2"] [PlyCount "82"] {[%mdl 8192] A85: Dutch Defence: 2 c4 Nf6 3 Nc3} 1. d4 d5 2. c4 c6 3. Nc3 e6 4. e3 f5 {this move-order is known as the 'Slav Stonewall'} 5. Nf3 Nf6 6. Bd3 Bd6 7. O-O O-O 8. Ne5 {the second most popular move here, after b3. White immediately occupies the hole on e5.} Ne4 (8... Bxe5 $5 {is an interesting option for Black that takes the game in a very different strategic direction.}) 9. f4 {White chooses a near-symmetrical structure, reinforcing e5.} (9. f3 $5 { has scored well for White, but on a very small sample (9) of lower-rated games. After the piece exchanges, a draw seems most likely.} Nxc3 10. bxc3 Bxe5 11. dxe5 Qc7 12. f4 Rd8 13. Qf3 Qa5 14. Bb2 Nd7 15. cxd5 cxd5 16. Rac1 Nc5 17. Bb1 Bd7 18. c4 Bc6 19. Qe2 Ne4 20. Bd4 Rac8 21. Qb2 {1/2-1/2 (21) Neunhoeffer,H (2281)-Ungerer,M (2144) Germany 2009}) 9... Nd7 10. Rf3 {White goes for an aggressive plan with the rook lift. This mirrors Black's usual strategic options in the Stonewall, since that is essentially what White is playing on his side as well.} (10. Nxe4 fxe4 11. Be2 Nxe5 12. fxe5 Rxf1+ 13. Qxf1 Be7 14. Bd2 Bd7 15. Bh5 g6 16. Bg4 Qf8 17. Qd1 Qh6 18. Qb3 b5 19. cxd5 cxd5 20. Rc1 Qf8 21. Rc7 Qd8 22. Ba5 a6 23. a3 Rc8 24. Qc3 Rxc7 {Adamski,J (2470)-Sydor,A (2395) Krakow 1978 1/2-1/2}) (10. Bd2 Ndf6 11. c5 Bc7 12. b4 Bd7 13. a4 b6 14. Nxe4 dxe4 15. Bc4 bxc5 16. bxc5 Nd5 17. Rb1 Bxe5 18. fxe5 Rb8 19. Rxb8 Qxb8 20. Bxd5 cxd5 21. Qc2 Qc8 22. Rb1 Qa6 23. a5 Bb5 24. Rb2 g5 {Izijk,J (2027)-Ramirez Gonzalez,M (2188) Aruba 2017 0-1 (35)}) 10... Nxe5 $146 {I judged that it would be best to eliminate White's strong knight, a choice validated by Komodo. The arrival of a pawn on e5 is somewhat cramping, but gives White fewer attacking chances.} (10... Ndf6 {had been universally played in the database prior to this.}) 11. fxe5 Be7 $11 12. Rh3 {continuing with the rook lift idea, focusing on pressure down the h-file.} Bd7 {time to activate the Stonewall bishop, or at least get it out of the way of Black's major pieces.} 13. Bxe4 { exchanging the centralized knight. This has the result of increasing the relative strength of my light-square bishop, however, as well as opening the f-file.} fxe4 $15 {Black has the pair of bishops, observes Komodo via the Fritz interface, along with a small positional plus.} 14. Qh5 {I'd had to calculate this far on move 12, given the threat on the h-file, but it is now easily refuted.} h6 $17 {under normal circumstances in the Stonewall this might be a weakening concession, but after the elimination of the Ne5 White has no minor pieces available to threaten g6 or sacrifice on h6. Black's control of the dark squares and g5 in particular means that a g-pawn thrust by White would also not work. My opponent is therefore lacking a good plan to make progress.} 15. Bd2 {activating his own 'Stonewall bishop'} Rf5 {although this harrasses the queen, the main point is to clear f8 for another heavy piece.} 16. Qe2 Bg5 {although e3 is well protected, the pressure is still annoying for White, and the bishop further blocks any ideas of a g-pawn thrust. More immediately, the move also clears the e7 square for my queen.} 17. Be1 $6 {White is having trouble activating his dark-square bishop. This maneuver only highlights Black's relative greater piece mobility.} (17. Qd1 $5) 17... Qe7 $17 18. Qg4 $2 {still dreaming of a kingside attack, it seems.} (18. Bf2) 18... Raf8 $19 {now the rooks have a stranglehold on the f-file and a mate in one is threatened on f1.} 19. Bh4 Qf7 $6 {in the Dutch, the Black player should be flexible in terms of kingside and queenside play. Here I make the same error on my opponent and fixate on the kingside, when my queen could make a decisive foray on the opposite wing.} (19... Qb4 $1 20. Rb1 Qxb2 {this is possible due to the back rank mate threat} (20... Bxh4 {is also sufficient for a major advantage.} 21. Qxh4 Qxc4 22. Qe1 c5 $19) 21. Qxf5 Qxc3 22. Qg4 Bxe3+ 23. Kh1 Qd3 $19) 20. Qe2 $17 Bxh4 21. Rxh4 Rf2 22. Qe1 $6 {a more practical-looking defense than the one given by the engine.} (22. Rf4 Rxf4 23. exf4 Qxf4 $17) 22... Qe7 {I thought for a while and played this somewhat less effective move. The idea was to hit the Rh4, but I did not have much of a follow up to it.} ( 22... Qf5 {this is more patient and threatens ...Qg5.} 23. Rf4 Rxf4 24. exf4 Qxf4 $19) 23. Rg4 {again, a reasonable-looking defense.} (23. Rf4 R8xf4 24. exf4 Rxb2 $17) 23... Rxb2 {an "obvious" move.} (23... Qb4 $5 24. Rb1 Qxc4 $19) 24. Ne2 {this is the main problem with Black's previous. Now the Rb2 is screened from the kingside action and White's knight can come into play.} Qa3 { this is too basic of an approach, simply targeting the a-pawn. I felt this at the time, but for whatever reason could not come up with something better.} ( 24... dxc4 $5 {having opted for queenside play, Black should logically follow up. I was illogically resistant to breaking up the Stonewall pawn formation, however. Knowing when to do this to your advantage is a key skill when playing the opening.} 25. Ng3 Qb4 26. Qxb4 Rxb4 27. Nxe4 Kh7 $19) (24... Qb4) 25. Nf4 { White is now successfully reorganizing his pieces for play on the kingside, which I have significantly weakened.} Rxa2 $2 {not a good decision, because now the opponent is right back in the game, comments Komodo via the Fritz interface.} (25... dxc4 {still preserves a Black advantage.} 26. Nh5 Rf7 27. Nf6+ Kh8 28. Nxe4 $17) 26. Rxa2 $14 {now we see that I have exchanged an active, dominant rook for White's previously inactive one, shifting the strategic balance. The extra pawn is not worth it.} Qxa2 27. h4 dxc4 $4 { throws away the game, notes the engine. An example of a good idea, but played too late.} (27... Rf7 {I had to think about defense first. On the 7th rank the rook covers both g7 and d7, which will come under pressure.}) 28. Qg3 $18 { now this comes with tempo, due to the attack on g7, and is crushing.} Rf7 ( 28... g5 {hardly improves anything} 29. Nh5 Kf7 30. hxg5 hxg5 31. Rxg5 $18) 29. Nh5 {White adds more attackers than Black can defenders.} Kf8 {the only way to keep playing.} 30. Rxg7 Qb1+ 31. Kh2 Qf1 {this maneuver added a defender on the f-file. I felt this was the best practical chance for me.} 32. Rg8+ Ke7 33. Nf6 c3 {for the moment, White has no immediate kill, so I decide to try to generate some counterplay, as a distraction if nothing else.} 34. Rg7 {my opponent thought for some time here. Black's formation is not easy to crack.} ( 34. Rh8 {is the non-obvious best move for Komodo. The point is that when Black sacrifices the exchange on f6 (as occurs in the game), White is better positioned with the rook.} Rxf6 35. exf6+ Qxf6 36. Rh7+ $18) 34... Be8 { this is what I had calculated and it appeared to frustrate my opponent.} 35. Rg8 Bd7 36. Rb8 $2 (36. Qg6 {in addition to the Rh8 idea, this would have kept the winning pressure on, although the path is complicated. For example} Qf5 37. Qxh6 c2 38. Rg7 c1=Q 39. Qh8 Qxf6 40. exf6+ Kxf6 41. Qh6+ Ke7 42. Qg5+ Kd6 43. Rxf7 $18) 36... Rxf6 $14 {another surprise for my opponent. This defensive exchange sacrifice is Black's only move to stay in the game.} 37. exf6+ Qxf6 38. Rxb7 c2 $16 {although White still has a slight plus in the endgame here, largely due to the active rook placement, it must have been very disappointing for him after having such a crushing attack going. Now he is forced to play some defense himself against the advanced passed c-pawn.} 39. Qe1 e5 40. Qc3 { I was happy to see this.} (40. d5 {is what I was concerned about as a response. } cxd5 41. Rc7 $16) 40... exd4 $11 {the engine evaluates this as equal. I had seen that there was a tactical trick lurking, however, and my opponent incorrectly goes for the "obvious move" of recapturing on d4.} 41. exd4 $4 { this now opens the c1-h6 diagonal and allows a queen fork of White's king and the c-pawn's queening square.} (41. Qxc2 $11) 41... Qf4+ 0-1

17 October 2019

Book completed: Grandmaster Performance by Lyev Polugayevsky


I recently completed Grandmaster Performance by GM Lyev Polugayevsky (alternate spelling Lev Polugaevsky). Note: I have a hardcover of the original Pergamon Press edition (above left), although the currently available edition with Ishi Press (above right) has a similar cover design.

As with previously completed annotated games collections such as Bronstein's Zurich International Chess Tournament 1953 and Walter Browne's The Stress of Chess...and its Infinite Finesse, I used it primarily for single-session reviews of each game, typically taking 15-20 minutes to go through it. I find this to be the ideal amount of time for maintaining focus and being able to absorb the lessons of each game, before moving on to something different. to do this, the games need to be instructive, informative and judiciously well-annotated. Grandmaster Performance fit the bill very well, in all respects.

Contents:

From the author - a preface from which I got Training quote of the day #19

Problems from the first move - this chapter focused on games where opening preparation was a deciding factor.

In search of the truth - featuring attacking games by the author. The chapter title comes from Polugayevsky's preference for objectively sound attacks, rather than attacking for its own sake.

From defence to attack - featuring games where the author is on the defensive, then finds resources to turn the tables on his opponent.

The touchstone of mastery - games where the author won due to strategically outplaying his opponent.

Finale of the chess symphony - includes endgames of particular interest to the author. Most of these games are still fully annotated, although there is one endgame fragment presented in the chapter.

Psychology of the chess struggle - Polugayevsky presents a few key games from his chess career and the considerations that went into his strategic choices in each case, predicated on his own state of mind and his opponents' capabilities and styles.

Grandmaster Performance is elegantly written (and translated) and has an excellent balance in the annotations between explaining moves, providing variations, and "color commentary" by the author. Each chapter holds together thematically, but when going through complete games one learns much more than just a single lesson. Throughout the book, and especially in the last chapter, one also gets a good sense of the practical considerations used by a strong, competitive player in making decisions, as well as the errors that inevitably occur. For improving players, seeing and absorbing this kind of candid, high-level commentary on thought process and decisionmaking is undoubtedly beneficial. It is also psychologically helpful to understand that chess is not a perfect game, even at the grandmaster level, and success comes from finding ways to win, including when under pressure and on the defensive.

11 October 2019

Annotated Game #223: Don't be afraid of queen endings

This fifth round tournament game continued the upwards trajectory of my quality of play...through the first 2/3 of it, I would say. The opening phase was reasonable, if not ambitious, and I successfully worked towards building an increasingly solid strategic game versus my opponent's isolated queen pawn (IQP) position. Some possible tweaks along the way are useful to see for White, but by move 18 I had acquired a small but stable advantage. My opponent then played actively and well in response, but missed a "small tactic" on move 23 that could have given me a more significant positional advantage if I had gone directly for an endgame transition, likely ending up with R+N on both sides.

Instead, I ended up with a trickier Q+N endgame that was evaluated by the engine as completely equal. I then passed up what I correctly evaluated as an easy drawing line on move 32, in favor of a riskier line that would at best also draw. Psychologically, this type of unjustifiably risky behavior is a common phenomenon, after a player previously evaluates they have superiority; the mind does not want to admit that the advantage has dissipated. The technical mis-evaluation of this situation is also an excellent teaching point, as Black's active queen and knight combination became much more of a potential threat once the queen penetrates to the second rank. Even then, though, my own active Q+N combination could have saved the day, had I calculated correctly. Remembering your own active resources in a queen ending means that you shouldn't have to fear going into them, just be careful of handing your opponent too much activity.

[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "ChessAdmin"] [Black "Class A"] [Result "0-1"] [ECO "A13"] [Annotator "ChessAdmin/Komodo 11.2"] [PlyCount "78"] {[%mdl 8192] A13: English Opening: 1...e6} 1. c4 e6 2. Nf3 d5 3. b3 c5 4. e3 { restraining, if not technically preventing, d5-d4.} Nc6 {with Black piling in on d4, I exchange pawns and advance my own d-pawn to prevent him from establishing a strong point there.} 5. cxd5 exd5 6. d4 Nf6 7. Bb2 { interestingly, all of the (limited number) of master-level players in the database went with Be2 here. The course of the below game is very similar (see the position on move 10), but White follows a different plan:} (7. Be2 Bg4 8. dxc5 Bxc5 9. Bb2 O-O 10. O-O Rc8 11. Nc3 a6 12. Rc1 Ba7 13. Nd4 Bd7 14. Nxc6 Bxc6 15. Nb1 Re8 16. Bd4 Bb8 17. Nd2 Qd6 18. f4 Qe6 19. a4 Bd6 20. Bd3 Bd7 21. Nf3 Ne4 22. Ne5 Rxc1 23. Qxc1 Rc8 24. Qd1 Bxe5 25. Bxe5 Nc5 26. Bc2 f6 27. Bd4 Be8 28. Bxc5 Rxc5 29. Qd3 g6 30. b4 Rc7 31. Bb3 Bf7 32. Rd1 Qb6 33. Qd4 Qxd4 34. Rxd4 Rc3 35. Bxd5 Bxd5 36. Rxd5 Rxe3 37. Rd6 Kf7 38. Rb6 Re7 39. g4 f5 40. gxf5 gxf5 41. Kf2 Ke8 42. Kg3 Rg7+ 43. Kh4 Rg4+ 44. Kh5 Rxf4 45. a5 Rf1 46. Rxb7 f4 47. Kg4 h5+ 48. Kxh5 Rg1 49. b5 axb5 50. a6 Rg2 51. a7 Rxh2+ 52. Kg4 Ra2 53. Kxf4 Kd8 54. Ke4 {1-0 (54) Sulskis,S (2507)-Rogule,L (2320) Liepaja 2018}) 7... Bg4 8. Be2 Rc8 {Black can get a check in on the a5-e1 diagonal after some exchanges, but it's useful to see how even giving up castling is still fine for White. Black still needs to take some time to develop his own kingside, so White does not lose time in a comparative sense.} (8... Bxf3 9. Bxf3 cxd4 10. Bxd4 Nxd4 11. Qxd4 Qa5+ 12. Ke2 Rc8 13. Rd1 Be7 14. a3 O-O 15. Ra2 Rfd8 16. b4 Qc7 17. g3 a5 18. bxa5 Qxa5 19. Kf1 Bc5 20. Qd2 Qa6+ 21. Qe2 Qe6 22. Rad2 Rd6 23. Kg2 {Katishonok,N (2265)-Berzinsh,R (2395) Riga 1993 1/ 2-1/2 (44)}) (8... cxd4 9. Nxd4 Bb4+ 10. Kf1 Nxd4 11. Bxd4 Bxe2+ 12. Qxe2 O-O 13. g3 Ne4 14. Kg2 Rc8 15. Rd1 b6 16. a3 Bc5 17. Bb2 Qg5 18. h4 Qf5 19. Nd2 Rfe8 20. Rac1 Nxd2 21. Rxd2 Qe4+ 22. Qf3 Rcd8 23. Rcd1 {Voskanyan,V (2213)-Li, Y (1866) Montreal 2016 1-0}) 9. O-O Bd6 {this bishop development should be a trigger for taking on c5, as occurs for example in analagous QGD positions with the colors reversed. Taking earlier, on the other hand, would save Black a tempo with the bishop.} 10. a3 $146 {this is unnecessary.} (10. dxc5 Bxc5 11. Nc3 O-O 12. Rc1 $11) 10... O-O (10... cxd4 11. Nxd4 Bxe2 12. Qxe2 $11) 11. dxc5 Bxc5 {Black has a very active position} 12. b4 {this was the idea behind the earlier a3, but if you compare the variations, above White has the knight and rook developed and can use them to pressure the Bc5.} Be7 {this turns out to be a wasted move, although my opponent was probably worried about the d-pawn and wanted to overprotect it.} (12... Bd6 13. Nbd2 $11) 13. Nd4 {a somewhat premature way to offer another piece exchange. White would do better by further development with Nbd2, perhaps after playing h3.} Bxe2 14. Qxe2 Bd6 15. Nd2 {finally getting the knight out. I chose this square over c3 for it, as I felt that it would be more effective in fighting for d4 (going to f3 for example) and not block the Bb2 on the long diagonal.} a6 {a little passive.} ( 15... Re8 $5) 16. h3 {this is similarly slow. I should get the Ra1 into the action.} (16. Nxc6 Rxc6 17. Rac1 $14) 16... Bb8 {now I'm able to resume progress.} (16... Nxd4 17. Bxd4 Qe7 18. Rac1 $14) 17. Nxc6 $14 Rxc6 18. Rac1 { although White has only a slight plus here, strategically I'm very comfortable. The d4 square in front of Black's isolated queen pawn is controlled and I have better prospects on the c-file. Black can't afford to exchange rooks on c6, for example, if he ends up with a backward pawn on the file that I can pressure.} Qd6 {protecting the Rc6 from an unfavorable exchange and also threatening a cheapo mate on h2, which I need to defend against.} 19. Nf3 (19. g3 $5 {is preferred by the engine and is a simpler way to blunt Black's threat. Without a light-square bishop, Black has no effective way of exploiting the weakened kingside squares.} Qe6 20. Rxc6 Qxc6 21. Rc1 Qe6 22. Kg2 $14) 19... Re8 20. Rxc6 Qxc6 21. Rc1 Qd6 {although this is no longer a mate threat, it's still annoying to have to watch for a check on h2.} 22. Qc2 {repositioning the queen away from the pinned e-pawn and giving her a great diagonal (b1-h7), while consolidating control of the c-file.} Ne4 {a more aggressive posting for the knight, traditional in IQP positions. However, a small tactic now lets me improve my position.} 23. Be5 {This apparently caught my opponent by surprise. Black cannot take twice on e5 because of the back-rank mate threat.} Qe7 24. Bxb8 $16 {with each minor piece exchange, Black's IQP becomes weaker, as I still have a lock on d4.} Rxb8 25. Nd4 {good but not best. With d4 under control, I should have immediately followed up to exploit my control of the c-file.} (25. Qc7 Qxc7 26. Rxc7 Nd6 27. Nd4 $16 {is a much better version of the idea.}) 25... g6 $14 {this covers f5, limiting the effectiveness of the Nd4, and also eliminates back-rank mate threats, so Black is now in better shape.} 26. Ne2 {time to reposition the knight.} Rd8 27. Qc7 {this is no longer very effective.} (27. Qb2 $5) 27... Rd7 28. Qb8+ Rd8 (28... Kg7 29. Rc8 $11) 29. Rc8 {this was the original idea behind Qc7, but is good only for equality.} (29. Qf4 $5 {with the idea of switching the rook to the d-file offered better chances for pressure.}) 29... Rxc8 $11 30. Qxc8+ Kg7 31. Nf4 { here I considered just going for the draw, which is easily done. Instead I over-evaluate my chances and pick a much riskier line which the engine evaluates as equal.} (31. Qc2) 31... Qe5 32. Qxb7 {I thought for a long time here. Black now penetrates with his queen and I have to watch out for problems on f2, due to the well-placed Ne4.} Qb2 {now things are much more complicated for the defense.} 33. Kh2 {this is still good enough for a draw.} (33. Ne6+ { I also considered and would draw.} Kf6 34. Nf4 {now I have the Nxd5 threat.} Qxf2+ 35. Kh2 Qg3+ 36. Kh1 $11) 33... Qxf2 34. Qxd5 $4 {I thought for a while here as well and simply did not visualize the resulting sequence properly.} ( 34. Qe7 {other queen moves can draw as well. In this line, the e3 pawn is now protected after the Ne4 moves, which is key.} Qg3+ 35. Kh1 Nf2+ (35... Qe1+ { is only good enough for a perpetual.} 36. Kh2 Qg3+ 37. Kh1 Qe1+ 38. Kh2 Qg3+ $11) 36. Kg1 $11) 34... Qg3+ $19 35. Kh1 Qe1+ {my opponent takes one more checking sequence to figure out how to win.} 36. Kh2 Qg3+ 37. Kh1 Nf2+ $1 38. Kg1 Qxe3 {now nothing can save White.} 39. g3 {one last attempt to confuse the matter.} Ng4+ (39... Ng4+ 40. Kh1 Qe1+ 41. Kg2 Qf2+ 42. Kh1 Qf1#) 0-1

01 October 2019

RandomJeff's 30-day slow chess challenge

Slow Chess League (SCL) member RandomJeff is making a concerted effort to get back into chess and has a 30-day challenge (30 slow chess games in 30 days) going on multiple platforms, including Chess.com and ICC. ("Slow chess" in this case means at a 45 45 or 90 30 time control).

You can see his progress on his blog at the below link, and also challenge him to a game:

https://www.chess.com/blog/RandomJeff

Details on the challenge at SCL: https://slowchessleague.org/2019/09/29/scl-30-day-challenge/


30 September 2019

Annotated Game #222: How it's supposed to work

For this fourth-round tournament game, it's useful to review how I got here:
While none of the above were clean games, the good news is that the quality of play was trending up, not to mention that I had actually managed to score 2/3. In this next game, by contrast, it went exactly "how it's supposed to work": start with a solid Caro-Kann Classical, win a pawn in the middlegame, snuff out White's limited compensation, and go on to win a rook and pawn ending.

Of course this kind of one-line game narrative never tells the whole story. Analyzing your own games uncovers the multiple layers involved, humbles you with hidden mistakes, and teaches broader lessons just as much with your victories as with defeats. Some key points here are:
  • I get at least a psychological advantage in the opening by causing a transposition from a queen pawn's opening to the Caro-Kann, which my opponent was not expecting to have to play. These sorts of opportunities are what opening preparation and repertoire choice are all about.
  • The different choices for Black on moves 11-12 on what to do with the dark-square bishop have a large strategic effect on the course of the middlegame.
  • 15...Qc7 is much better than the awkward ...Qe7.
  • The tactic on move 19 (a double attack by the queen, forking White's king and pawn) was not forced, but it was the psychologically easiest line for my opponent to play and what I was expecting. My opponent's other choice would have caused a lot of problems for me in defending.
  • I should be more aware of indirect means of accomplishing goals, for example undermining White's Nd6 rather than somewhat stereotypically attacking it head-on.
  • Although the pawn-down rook endgame wasn't necessarily lost for White, I had the energy to keep the pressure on and calculate reasonably well, instead of letting it drift into a draw. Rather than be stressed about winning when you have an advantage, I think it's much more productive to treat it as an opportunity to make your opponent suffer to the best of your ability. From personal experience, that's certainly how it feels on the other end, and sustained pressure is likely to eventually cause a breakdown in play, regardless of whatever the engine evaluation says.

[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Class A"] [Black "ChessAdmin"] [Result "0-1"] [ECO "B19"] [Annotator "ChessAdmin/Komodo 11.2"] [PlyCount "106"] {[%mdl 8192] B19: Classical Caro-Kann: 4...Bf5 main line} 1. d4 d5 2. Nc3 { this is normally how White enters the Veresov Attack.} c6 (2... Nf6 3. Bg5 { is what White was aiming for.}) 3. e4 {White abandons a queen pawn opening to transpose into a main line Caro-Kann. A small psychological victory already.} ( 3. Bg5 {has much less bite now, especially since Black can answer} h6 {and now} 4. Bh4 (4. Bf4 Nf6) 4... Qb6 {followed by ...Bf5 will result in a favorable type of Slav setup for Black.}) 3... dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 { My opponent is evidently familiar with how to play this line, even if it was not his preference from the start.} h6 7. h5 Bh7 8. Bd3 Bxd3 9. Qxd3 Nf6 10. Nf3 e6 11. Bf4 Bb4+ (11... Qa5+ {is a much more popular version of the idea of exploiting the a5-e1 diagonal and provoking a White response, either c2-c3 or retreating the bishop.}) (11... Bd6 $5 {is the most played move in the database, directly challenging White's bishop.}) 12. c3 Bd6 {now White has the extra move c2-c3, but Black's argument is that the weakening of the queenside squares is worth the tempo.} (12... Be7 {is a less confrontational way to play. Here's a top-level example:} 13. O-O-O O-O 14. Ne4 Nxe4 15. Qxe4 Nd7 16. g4 Nf6 17. Qe2 Qa5 18. g5 Nd5 19. Bd2 Bxg5 20. Nxg5 hxg5 21. h6 g6 22. Qe5 f6 23. Qxe6+ Kh8 24. c4 Qxa2 25. cxd5 cxd5 26. Qe7 Rac8+ 27. Bc3 {Anand,V (2803) -Vallejo Pons,F (2684) Leon 2008 1/2-1/2}) 13. Be5 {my opponent decides to maintain control over e5, at the cost of exchanging the remaining bishops.} Bxe5 14. Nxe5 Nbd7 $146 (14... O-O 15. O-O-O Nbd7 16. f4 Qa5 17. Kb1 Rad8 18. Ne4 Nxe4 19. Qxe4 Qd5 20. Qxd5 exd5 21. Nxd7 Rxd7 22. Rde1 Rc8 23. Rh3 Kf8 24. Rhe3 Rdd8 25. Kc2 Re8 26. Re5 f6 27. Rxe8+ Rxe8 28. Rxe8+ Kxe8 {1/2-1/2 (28) Negi,P (2529)-Zenklusen,R (2392) Biel 2007}) 15. f4 Qe7 {this somewhat awkward move was intended to maintain flexibility in castling, leaving open the possibility of O-O-O by protecting the f7 pawn.} (15... Qc7 $5 {puts the queen on a better diagonal (b8-h2), keeps open the idea of going to b6 or a5, and supports a possible ...c5 break.}) 16. O-O {That doesn't look like a safe castle, comments Komodo via the Fritz interface. White is under no immediate threat, but this decision at least makes it easy for me to decide to castle kingside as well.} (16. O-O-O {and White's king is more secure than on the much airier kingside.}) 16... O-O $11 17. Qf3 Nd5 {deliberately intended to provoke White's next.} (17... Nxe5 {is a more straightforward way to proceed.} 18. fxe5 (18. dxe5 Nd5 {and now the knight is secure in its central post due to the same tactic as appears in the game, namely} 19. c4 $2 Qc5+ $17) 18... Nh7 {this looks awkward but g5 will be a nice post for the knight. Compare this position with the below variation after a similar fxe5 and it's clear that this is the better path.}) 18. c4 {the "obvious move".} Nxe5 (18... N5f6 $11 {with no psychological investment in having just moved the knight, the engine evaluates the retreat as objectively best. White has no further threats and Black's pieces are actively defending.}) 19. dxe5 $6 {my opponent appeared to miss my next move.} (19. fxe5 {would lead to a small plus for White, with pressure on the kingside and some careful defending required for Black.} Nb6 20. Ne4 Rad8 21. Qg4 Nxc4 22. Rf3 Kh8 23. b3 Nb6 24. Nf6 Qb4 25. Rd1 Rg8 26. Nxg8 Kxg8 $14) 19... Qc5+ 20. Kh2 Qxc4 $17 {White has some compensation for the pawn, in terms of better placed and more active pieces. The advanced kingside pawns also give him some hope of pressure on my king position, although I dont believe there is enough material left on the board to make that a real threat.} 21. b3 Qc3 {I am happy to swap queens and head for the endgame with a 3-2 queenside pawn majority. White cannot really avoid it, either, now that my queen has penetrated and has the support of the Nd5.} 22. Ne4 Qxf3 23. Rxf3 Rad8 {this is fine, but I end up not handling the resulting dyanmics on the d-file as best as I could.} (23... b6 $5 {might be easier to play here, in anticipation of White's next move, since now it's easier to start mobilizing the pawns after ...c5. In the game, I get hung up on the d-file.}) 24. Nd6 {this was annoying, but the knight is not a real danger for Black.} Rd7 (24... b6 {again would be simpler.}) 25. Ne4 {guarding the c5 square, but I was happy to see it retreat. I also will take control of c5 momentarily.} (25. a3 f6 26. Raf1 b6 $17) 25... b6 26. Rc1 c5 27. Rcf1 { this looks somewhat menacing, but White has no real prospects on the f-file.} ( 27. Rd1 $5) 27... Ne7 28. Nd6 {back to plugging the d-file again.} Nc8 { this is OK, but is too literal an interpretation of the need to challenge the Nd6.} (28... Nc6 {would instead look to undermine it.} 29. Re1 f6 30. Rfe3 Nb4 31. R1e2 Nd5 32. Rf3 fxe5 33. fxe5 Rxf3 34. gxf3 Nf4 $19) 29. Rd3 Rfd8 30. Rfd1 Nxd6 31. exd6 {in reaching this position, I felt that I had not played optimally and made things harder for myself (which is true). With what appeared to be a static situation on the d-file, I decided to try to mobilize the queenside pawns.} b5 (31... f6 $5 {with the idea of ...Kf7 might be better preparation.}) 32. g4 {White correctly gets his pawns into play as well.} c4 33. bxc4 bxc4 34. Rd4 Kf8 {this was an uninspired waiting move.} (34... c3 $5 { causes White more problems.} 35. R4d3 c2 36. Rc1 Rxd6 37. Rxd6 Rxd6 38. Rxc2 Ra6 {is an improved version of the game, with White's king further away from the action. White's rook cannot profitably take advantage of the 7th/8th rank weakness, either, for example} 39. Rc8+ Kh7 40. Rc7 Rxa2+ 41. Kg3 f6 $19) 35. Kg3 c3 36. Rc4 Rxd6 37. Rxd6 Rxd6 38. Rxc3 Ke7 $15 {this is starting to look much more like a draw, since with the rooks on the board it will be difficult to realize the value of the extra kingside pawn.} 39. g5 f6 {this is fine, although it may be better to take away squares from White's rook first.} (39... Kd7 $15) (39... hxg5 $6 {should be avoided, as it gives White the possibility of creating a h-file passed pawn and also boxes in Black's king.} 40. fxg5 $11) 40. Ra3 $6 {this puts White's rook in front of his own pawn and limits its scope. Rook activity is the most important principle in rook endgames.} (40. Rc7+ Rd7 41. gxf6+ gxf6 42. Rc8 $11) 40... a6 $15 41. Ra5 $6 (41. g6) 41... fxg5 42. fxg5 hxg5 (42... Rd5 {is much more effective. Black should not worry about swapping the a-pawn for a White kingside pawn and making the e-pawn mobile.} 43. Rxa6 Rxg5+ 44. Kh4 e5 $17) 43. Rxg5 $15 Kf6 44. Rg6+ Kf7 {Here I felt like I should be able to win with the proper effort, although Komodo shows only a small edge to Black. It will be harder for White to cover his own pawns while stopping the progress of the e-pawn.} 45. Rg4 {best, making the rook mobile again.} Rd5 46. Kh4 e5 {passed pawns must be pushed!} 47. Rg6 { this makes it easier for me, as the e-pawn becomes significantly stronger the further it moves down the board.} (47. Rg5) 47... e4 $17 48. Rxa6 $2 {my opponent miscalculates the strength of the e-pawn and his ability to stop it.} (48. Kg3 e3 49. Kf3 $17) 48... e3 $19 {this wins by force.} 49. Ra7+ (49. Kg3 Re5 $19) 49... Kf6 50. Kg3 Re5 51. Ra6+ Kf5 52. Ra4 e2 53. Rf4+ Ke6 0-1