In the last few articles, we looked at a tactic called the pin in which a piece of lesser value was stuck in front of a piece of greater value along a rank, file or diagonal. Should the piece of lesser value move, the piece doing the pinning, the attacker, swoops in and captures the piece of greater value. With a skewer, the piece of greater value switches places with the piece of lesser value. A typical pin might be composed of a Black Bishop on g4 pinning a White Knight on f3 to the White Queen on d1. With a skewer, we’d have the Bishop still on g4 but the White Queen would be on f3 and the White Knight on d1. Of course, this rearrangement wouldn’t work for the Black Bishop unless that Bishop was protected with, for example, a Black pawn on h5 to back the Bishop up. While there are similarities between a pin and a Skewer, there are definite differences between the two.
As with the pin, the pieces able to partake in a skewer are your long distance attackers, the Bishops, Rooks and Queen. As I’ve said before, tactics are important and can turn a game around in your favor when used wisely. I say “when used wisely” because many beginning and intermediate players depend on tactics too much. They play solely around the idea of setting up tactical positions in order to gain a material advantage. While there’s nothing inherently wrong with employing tactics, you have to be careful when setting a tactical play up. Why? Because you may have to weaken your position when making the first move or two in a tactical combination, setting the tactic up. Of course, if your opponent is oblivious your plan, you’re fine and the tactical play is successful. However, if your opponent spots the potential tactical play, you’ll end up trying to correct your positional weaknesses. Use your tactics wisely, allowing the opportunity to present itself through poor opposition moves (especially if you’re a beginner) rather trying to set up complicated positions that force tactics. As you improve, so will your ability to spot tactical opportunities and set up combinations. Remember, we first learn to walk before learning to run. Here’s an extremely simple example of a skewer:
As I mentioned earlier, a skewer takes place when a piece of higher value is pinned in front of a piece of lower value along a rank, file or diagonal. In our example, White’s Queen is stuck in front of the White Rook along the f1-a6 diagonal. The Queen is worth nine points or dollars (I use money because everyone, both young and old, can relate to the value of a dollar) and the Rook behind it on the diagonal is worth five points or dollars. Again, the set up is like a pin but the more valuable piece is in front of the piece of lesser value (the reverse is true for a pin). The piece attacking the Queen, Black’s light squared Bishop, is worth three points or dollars. It’s important at this juncture to remember that ideally, the piece attacking the skewered piece should be of lesser value than the piece stuck at the tail end of the rank, file or diagonal where this tactic takes place. However, the value of the pieces involved in a skewer can have varying values but we’ll get into that later on. In our first example, the Queen will have to move, otherwise Black will end up with an even greater material gain. When the Queen moves, 1.Qd1, Black snaps up the Rook with 1…Rxf1 followed by 2. Qxf1. Black has traded a three dollar Bishop for a five dollar Rook netting two dollars. Always consider the value of any exchange before engaging in one!
This skewer for Black was only profitable because Black’s Bishop had protection, namely the pawn on b5. If the pawn wasn’t there then White would simply capture the Bishop! This would be a problem for Black! Now let’s look at skewers in which the piece at the tail end of the skewer is of equal or lesser value that the attacking piece. In our first example, the Bishop was worth less than the Rook trapped behind the Queen. Therefore, trading itself for the Rook makes sense. However, what if a Queen is skewering a piece of greater value, such as the opposition King to a piece of lesser value such as a Rook. Take a look at the example below:
In the above student game example, White plays 1. Qh7+ which directly attacks the Black King. However, this is more than just a check because when the Black King moves, 1. Kc8, the Rook behind it on the seventh rank is then captured by the White Queen after 2. Qxa7! This greatly changes the balance of material in favor of White. While White had more material that Black going into this endgame position, the loss of Black’s Rook is a game changer! While the piece being captured (the Black Rook) was worth less than the Queen, it’s capture eliminated an opposition piece making it much easier for White to win the game. During endgame play, the loss of material is devastating since you have fewer pawns and pieces with which to deliver checkmate. Therefore, using a skewer to create a deficit in opposition material can be a winning tactical play for you.
In the above example, the skewer worked because of two factors. The first factor is that the black King was positioned two squares away from the Rook. To protect the Rook, the Black King would have to be on an adjacent square to the now captured piece, but this leads me to point two, the Bishop on f3. White’s light squared Bishop was on a square that allowed coordinated play between both White pieces. The White Bishop on f3 covered the c6, b7 and a8 squares which means the Black King had no access to those squares and couldn’t protect his Rook. Piece coordination is critical when creating or employing tactics.
When looking for potential skewers, as in the case of the pin, you want to keep an eye on any rank, file or diagonal on which there are pieces. Tactical plays can often fall into your lap when playing against opponents who don’t followed principled play. To avoid falling victim to a skewer, you should always look at any rank, file or diagonal on which you have pieces. The last example of a skewer is a common tactical theme during the endgame. To avoid such a loss you want to make sure you have, your pieces protected. During this student game, Black had an opportunity earlier in the endgame to protect his Rook but didn’t. While our last example used the White Queen to Skewer the Black King and Rook, a White Rook could have done the same job. The advantage the Queen has is her ability to cover diagonals as well. If you’re a beginner or just became an intermediate player, I’d suggest looking for potential skewers rather than trying to set them up with a series of moves. After you’ve developed better chess vision, being able to see the entire board and spot potential problems for both you and your opponent, then consider creating combinations that lead to skewers. Also, remember that tactics are a two way street which means your opponent might skewer you if you’re not keeping a watchful eye over the ranks, files and diagonals your pieces sit on. We’ll continue our examination of tactics next week but until then, here’s a game to enjoy!