One tactic in chess, similarly as in actual combat, is a special move or a set of these that is aimed at achieving a particular goal in the game. This objective can be to take material to the opponent, improve one's position or facilitate mate. In chess there are several tactics, which sometimes may involve the immediate win (checkmate), some of the best known are:

* Double direct attack
* Double attack discovered
* Double attack on parts that are covered "X-rays."
* The pin.
* Parts overloaded and attack the defending piece.
* Jaque exposed.
* Double check.
* The intermediate move.

There are also other tactics, which are also fundamental in chess, such as:

* Deviation
* Attraction
* Destruction of the defense
* Lock
* Lines Intercept
* Clearance boxes or lines

In-depth knowledge of the tactics often distinguishes an intermediate or advanced chess player a rookie. Computers are especially strong in tactics, as they require few moves, however are weak in that strategy are plans that involve a lot of plays.

* 1 Double direct attack
Double pawn or 1.1
Double bishop or 1.2
or 1.3 Twin Tower
Room with queen or 1.4
Room with king or 1.5
Double or 1.6 horse
* 2 Double attack discovered
* 3 Double attack on parts that are covered "x-ray
* 4 The pin
* 5 Deviation
* 6 Attraction
* 7 Destruction of defense
* 8 Lock
* 9 lines Intercept
* 10 Clearance boxes or lines
* 11 References
* 12 See also

* Double direct attack
A double strike which is threatening two pieces at once, so that the attacker you. The horse is the best piece for a double attack.

* Double pawn
Advancing a pawn can be doubled to two parts located on the same row and column alternate. The pawn can not be captured. This attack is almost always the capture of one of the pieces being the pawn attack and the piece of lowest value, it is always advantageous to change.

* Double bishop
Such that he attacks two pieces, such as the case of two horses, resulting in a very useful tactic, since it is the latter.

* Double Tower
A tower placed on a line forming two enemy pieces is a powerful double attack, for example defended a tower set between a queen and king.

* Double queen
The lady to act as bishop and rook has great potential in the double attack, combining in one piece the power of both which is widely used in attacks double check to make material in the finals.

* Double King
Minor but very useful in the finals to win material and block laborers seeking enemigas.Puede crown or other parts used to mate with king and double queen.

* Double Horse
The horse is king of the double attack for its range of motion. It is very powerful to attack high-value parts like two towers, rook and queen or queen and king.

* Double attack discovered
It consists of two pieces of the enemy threat in the same play, with our two pieces: one with the piece threaten to have moved and another with a second piece that the movement has been discovered. Such tactics can be played with many combinations of parts. A variant of this double is to kill an opponent's piece, although the have defended. If your opponent kills the piece we've moved, we can kill another piece that has been discovered, and if the opponent chooses to withdraw or defend the piece threatened by our outdoor piece, then we can remove and save the piece with which we killed initially: the result is always a gain of material.

* Double attack on parts that are covered "x-ray
Is to attack a piece that if the opponent withdraws to another box, it threatens a second piece. This play always involves the loss of one of the two pieces. There are six possibilities, rook or bishop attacking queen and king (and queen or king) and bishop attacking rook and king (or king and rook). You can also attack, for example, the queen and a rook with the bishop.

* The pin
It consists of a piece that attacks another that can not be moved or should not move because if this is done, resulting in a check or advantageous to capture the attacking piece. An example is a bishop attacking a tower whose very diagonally behind the tower is the king, this results from the inability to move the tower with the subsequent capture of the tower by the bishop in this case. Also, even that would not be captured, nailing a piece unusable to that person who can not move to eliminate its possible defensive or offensive action to third parts depending on the same side or opposite.

Some defenses against a dunk are:

* The interposition.
* The contraclavada.
* Move a back room.
* Move the piece itself that causes the pin.
* Distract clavante piece.
* The question clavante piece.
* Anticipate the pin.

* Deviation
The deviation is an important tactical weapon, is to force a rival piece to leave his current position, giving access to our parts boxes or lines

* Attraction
The attraction is a tactical element that is to attract favorable opponent piece (usually the king) to a particular box. The attraction has a great resemblance to the issue of diversion.

* Destruction of the defense
A tactical weapon of great power is the combination based on the elimination of the part that controls important lines or squares on the board. Has similarity to the deviation, but in this case the counterpart is captured and not diverted.

* Lock
The aim of this resource is tactical force a rival piece to occupy a square that is harmful, usually for their own king. It is an effective way to eliminate the coordination of the opposing forces.

* Lines Intercept
Through this tactical resource, the connection between two or more pieces of the opponent is obstructed, impidiento access to a box or lifeline.

* Clearance boxes or lines
Sometimes a piece prevents the passage of others on the same side of a box or line that would have great effect. In this case, we must "give way"

Source: http://davchess.com/forum/tactica-t2854.html

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