This week, I’d like to visit what, in my opinion, is one of the most double-edged topics in chess – the exchange sacrifice. When stripped to its core, the concept of the exchange sacrifice is one of the most intriguing and fascinating out there. It’s still a sacrifice – in that when taking into account a hard count of material value, the propagator comes out in the negative. Yet, the balance regarding the number of pieces on each side stays intact. While the latter may seem like a rather primitive method of comparison, it can make a huge difference, especially when attacking. They also create a dynamic imbalance in many positions, especially when considering square control, since one player has (or lacks) influence over certain sets of squares.
However, this week, I wanted to look at a different purpose for exchange sacrifices. Specifically, I wanted to look at the use of exchange sacrifices in order to inflict pawn structure damage. The reason for this is that I recently played a game where I was able to do just that, and while I wasn’t able to win the game, it could still serve as an instructional source.
First, let’s start with a few examples from more prominent players.
Szabo – Petrosian, Stockholm Interzonal, 1952
In this position, White really only needs one more move in order to claim the initiative. If it was his turn, White could play moves such as Nc4, Be3, and even Qd3. Thus, Black knows that this is a critical point in the development of the game. Petrosian, sensing that the time to act was now, plunged forward with the exchange sacrifice
- … Rxc3
The main point of this is to destroy the king’s pawn cover. However, it also accomplishes a few other things. It loosens White’s grip on the d5 square, which allows Black to play d5 on his own and open up his dark square bishop against the newly-weakened queenside pawns. You can see how Petrosian played against the pawns to eventually reel in the full point here.
Kramnik – Fridman, Dortmund, 2013
In this position, White lacks a clear target to attack in Black’s camp. While White has started to push pawns on the kingside, Black’s pawn structure doesn’t offer any clear weaknesses. Thus, Kramnik, with the intent of creating said weaknesses, decides to sacrifice an exchange with
- f6! Bxf6 21. Rxf6!
which shatters Black’s pawn structure. With the clear weakness now on f6, Kramnik went to work on focusing essentially all of his pieces on that pawn and eventually broke through to get to the king, as you can see here.
For the last example, we’ll go back to that game I mentioned earlier.
Kobla – Stevens, K-12 Grade Nationals, 2017
In this position, Black’s centralized knight on d5 is the only thing worth writing home about. Aside from it, the rooks are disconnected, and many of the pawns are immobile. That said, Black has a fairly straightforward threat with Re8, since fork ideas with Nc3 are looming over White’s head. In order to avoid all complications regarding that knight, I decided that sacrificing the exchange with
- Rxd5 cxd5 30. Nd6
would be best. In addition, Black’s queenside pawn structure is severely weakened, as the pawns on b5 and d5 are both hanging and unprotected; the knight outpost on d6 combined with the queen’s positioning gives White full control over the e-file, at least for now. The direct threat of Nxb5 followed by a secondary threat of Qh2+ gives White more than enough tactical compensation for the exchange. While the game itself ended in a draw, this is still an example where sacrificing the exchange was the best way forward.
In these three games, we saw a player sacrificing an exchange for somewhat different reasons. In the first game, we saw Petrosian sacrifice an exchange for a positional plus – White’s crippled pawn structure and control over the dark squares. In the second game, we saw Kramnik sacrifice an exchange to give direction and coordination to his pieces such that they could converge on the damaged pawns and later the king. In the third game, I sacrificed an exchange to get rid of my opponent’s strong point and give my knight dominance over some central squares and weak pawns. Despite their differences, however, they all had one thing in common – making the opponent recapture with a pawn, thereby weakening their pawn structure and grip on the position.
To wrap things up, this will be my last post for 2017, so I’ll take this opportunity to wish all of you a Merry Christmas and a Happy New Year!! And, for the sake of resolutions, I challenge all of you to sacrifice an exchange and win if the opportunity presents itself at some point over the next year. As always, thanks for reading, and I’ll see you next time!