1 Basic football theory 1, the first principle: the principle of position sense-every player on the field always reminds himself not to lose his position. Clearly understand that "seeking politics in its position", the captain arranges you to play, and then performs the offensive and defensive duties in that position. No matter whether it is assisting or running, the opponent who is intercepted in the attack should immediately fight back, delay the opponent's attack time and give his teammates a chance to retreat. If you can't move, you can quickly return to your position to rest, unless you cramp and fall to the ground. No matter how tired you are, you should chase for at least three seconds. Count by yourself: one, two, three seconds! If you are not injured, you will be discouraged as soon as you lose the ball and walk back slowly. This attitude will be resolutely put an end to. 2. The second principle: the principle of center of gravity deviation-the ball is on the left and the overall center of gravity of the team moves to the left; The ball is on the right and the overall center of gravity moves to the right. When defending, the avant-garde and full-back contract inward, and when attacking, they expand sideways, making full use of the width of the stadium. Only when the whole team moves together can a local situation of "playing more and playing less" be formed. Overall replacement has many advantages, such as saving physical strength, easily encircling the enemy, and the possibility of more wars and fewer wars in some areas. Even if the opponent holds the ball, it is invalid and does not pose a threat. 3, the third principle: the principle of running and receiving-all players need to run without the ball. The basic consciousness of playing football is to catch the ball and catch it. In fact, for any player, knowing the ball is actually a basic requirement. This is a question of consciousness, not inspiration, so it can be cultivated and accumulated. The focus of serving is running, triangle attack, triangle serving, one person takes the ball, and three people in the adjacent position must run to catch the ball. One person should take turns to close the door to welcome, forming a dynamic triangular structure. It must be understood that sometimes, our receiving and pulling are not necessarily to get the ball, but to create gaps and opportunities for teammates. 4, one of the tactical points: triangle attack and defense-in different offensive or defensive situations, we must change the position of the double triangle. A principle, close to complement, move as a whole. In this way, the overall offensive and defensive changes. Don't think that the ball is far away from me, so I don't have to pay attention to it. When I get close to my teammates, I will make up for it. At this time, it is often too late, because my teammates have already made up for it. If you don't keep up, it will lead to the annihilation of the whole army. 5. The second tactical point: wing setting and reverse insertion-when the winger takes the ball and the full-back inserts from behind, it is the standard wing setting of the full-back; It is also a standard winger tactic to hold the ball in the lower back, retreat before receiving, insert the forward and insert the winger quickly around the sidewalk. Flanging and reverse insertion are the most commonly used side attack tactics in football matches. Only two players need to cooperate in reverse insertion, while the whole cooperation is needed in hemming, not one person's hemming. Successful hemming tactics need the cooperation of teammates. One of the purposes of flank setting and reverse insertion is to insert the ball into the opponent's neutral zone to open the opponent's defense, and the other reason is the purely tactical pull requirement, which aims to attract the opponent's defender and pull out the gap for his teammates. 6. The third tactical point: multi-local 2 hits 1, 2 hits 2, straight pass oblique insertion, oblique pass straight. Local cooperation can be used between any two very close players. Small local cooperation and great mobilization are the basic skills of every mature team. 7. Goalkeeper: When you get the ball, you are the initiator of the attack and run to the corner of the * * area immediately. The full-backs on both sides pulled the edge for the first time, and at the same time, the back waist and front waist began to run quickly to meet. 8. Central defender: one is staring at the top, and the other is behind. Two people should cooperate with each other, one person rushes to stop the killing, and the other person is responsible for cleaning. Keep an eye on the central defender, don't be afraid of physical confrontation, save the ball. Take advantage of the opportunity to kick hard and stop in time. Pay attention to the situation on the field after support, and respond to the position as soon as there is a loophole. Principle of defensive position of central defender: 1 Stand on the inside, and stand in the middle of the straight line between the opponent's striker and the goal when defending one; Keep your distance, so that you can get close to the defensive object, and first take the ball from behind the defensive object; 3. Steal or defend all incoming balls that don't let the pass and pass slowly; 4. If you can't steals the ball, you should try to block the ball; 5. If you can't stop the strong grab, you must retreat to delay the opponent's attack and retreat in the space between the opponent and your own goal. The best time to grab the ball is when the attacker tries to turn around, that is, the moment he turns around. At this point, the attacker can't cover the ball well with his body, and his center of gravity is unstable. 9. Full-back: The main function of full-back defense is to keep an eye on the offensive players who enter the defense area, not to let opponents dribble or cooperate with each other, and to protect the middle defense area. When the ball moves to the other side and the central defender leans to the other side, move closer to the middle road in time; Quickly fill the position when the middle is broken, and keep tacit cooperation with other defenders; When the delayed central defender creates offside, he should act synchronously. When the opponent attacks, he should stand on the line between the opponent's player and the goal to prevent the opponent from shooting long distances. When the opponent breaks through, he must get stuck in the inside position and push to the corner flag area. Don't jump up easily when the other party strikes back. Attention and middle and back complement each other.