These points are arcs and rays intersecting, and they look like a "ten" shape, hence the name cross points.

The point where the 0-degree scale line intersects with the middle lane is the center of the basket, and after the cross short straight line of 0.5 meters thickened, it is named the cross crosshair.

Take 7 of the rays, namely 15 degree angle, 45 degree angle, 60 degree angle, 90 degree angle (middle lane), 120 degree angle, 135 angle and 165 degree angle, and make bold marks on the 21 important gun points on these 7 rays.

Among them, on the 14 important artillery points of the 50th line and the 75th line, a 0.25-meter arc is drawn, which crosses with the cross-cannon point to form a "Tian" character shape, so it is named Tianzi artillery point.

Among them, the 7 important cannon points on the 25th line are marked by the 0.5-meter ray extending outward from the 25th line, intersecting with part of the arc, forming a "T" shape, named the T-shaped cannon point.

The various cannon points are cumbersome to say, but after naming them using the password editing method, it is very easy to say.

Here are some examples.

If you put 25 lines, 50 lines, and 75 lines, these three lines are named C line, B line, and A line respectively.

The three artillery points that intersect the 15-degree angle ray with the 25 line, 50 line, and 75 lines can be named C15 gun point, B15 gun point, and A15 gun point respectively.

In the same way, the three gun points on the 120-degree angle ray are the C120 gun point, the B120 gun point, and the A120 gun point.

Naming conventions for artillery points, and so on.

In this way, if you call out B165 casually, you can know that this is a cannon point obtained by the intersection of 50 lines and 165 degree angle rays.

Of course, you can also use three different letters such as XYZ to mark 25 lines, 50 lines, and 75 lines.

Of course, ABCDEFG can also be used to mark some special cannon points. to confuse the judgment of the opponent.

In the 40s of the 21st century, each team had its own set of codebooks, made multiple password edits for each gun, and used certain special tactics at key moments, which only the players who carried out the corresponding tactics knew, which was the core secret of the team.

So, the corresponding code-breaking experts. It also came into being!

In basketball, the common high-level blocking and dismantling are basically in the left and right waist positions and the top of the arc area, to put it bluntly, the B45 gun point and B60 gun point in the left waist position, the B90 gun point (free throw point gun point) in the arc top area, and the B135 gun point and B150 gun point in the right waist position.

The common outside of the three-point line are basically the A45 gun point and A60 gun point in the left shoulder area, the A90 gun point (Tianlinggai gun point) in the brain area, and the A135 gun point and A150 gun point in the right shoulder area.

The common under-basket card or paint layup is mostly on the 25 line.

A reasonable collision zone in the NBA is a semi-circular arc of 1.2 meters, plus a line width of 0.05 meters, and the player's feet are between 0.3 and 0.5 meters and their arms are between 0.7 and 1.0 meters. Therefore, when the defender is defending from behind, he must stand at a distance of 1.7 meters in order to create an offensive foul on the attacker.

The attacker is pushed outward by the defender's hand, and the position under the basket must be pushed to near the 25th line.

The method of marking artillery points is to distinguish the differences between each artillery point in tactics.

The 14 Tianzi gun points on the 50 and 75 lines are collectively known as A-level gun points, which are mainly used for blocking, blocking, covering, and shooting.

The 7 important T-gun points on the 25th line are collectively referred to as C-level gun points. It is mainly used to play under the basket, or to play with the back, or to turn to the basket, or to cut the pass;

The remaining 18 gun points are collectively referred to as B-class gun points. Only used for shooting.

Here is the purpose of the 12 red ribbons on the basket frame.

These ribbons and angle rays are matched one by one, with the center of the basket as the center of the circle, separated by 15 degrees of angles, 12 ribbons are drawn, collectively called: rainbow crosshairs.

The center of these reticles corresponds exactly to the angular rays. It is also bisected by the angle ray, 7.5 degrees on each side, and is mainly used for angle checking when shooting, which is convenient for improving the shooting rate.

Among them, the rainbow crosshair corresponding to the middle lane is named: the middle lane crosshair.

As we all know, the basket itself is round though. In the player's line of sight, it looks like a short straight line, and when shooting, you can only rely on your intuition to perceive the center of the basket and shoot.

This intuition requires repeated training and is extremely difficult.

With the cannon point and the rainbow crosshair, the difficulty is reduced, and the hit rate is naturally improved!

Finally, the nine-square grid on the rebound.

Although players are always used to aiming at the basket when shooting, after the basketball rebounds, most of the time it bounces off the rim or out of the rebounding box.

When a player is playing a board shot, he always aims at a small area within the rebounding box and uses the angle to bounce off to complete the board shot.

Sometimes, a player gets fouled, the shot becomes a board, and the lucky hit, that's not discussed.

The ability to judge rebounding depends on the player's own rebounding sense and ability to grab the ball in position.

The situation is even more complicated after the angle rebounds, so there are even fewer players who specialize in training to shoot on the board.

In the NBA, there are very few players who are good at playing the board and shooting.

Therefore, after drawing a nine-square grid within the rebound box and subdividing the nine small boxes, the situation is much clearer.

The originator of the technique of cricket (playing cricket shooting) was Sam Jones, who made great contributions to the Celtic dynasty. With this trick, he cut down a series of gorgeous statistics, which was unique in the 60s of the 19th century.

Decades later, "Dumb", "Stone Buddha", and "Dumb Man" Tim Duncan carried forward this trick and practiced a "45-degree angle shooting board" technique, opening the bow left and right, plus feints, easy jump shots, can have a high hit rate, which is amazing.

This technique can be used in both the 50th and 25th lines, that is, between the B45 and C45 points, and even within the reasonable collision zone.

Typically, under-basket wiping is the most common.

This is a small player who hits the penalty area, faces a tall defender, and shoots in the form of a board, which improves the arc of the shot, so as to avoid the danger of being blocked, so as to win a 2+1 opportunity.

Mr. Larry Silverberg, a mechanical engineer at North Carolina State University in the United States, has done a professional study of basketball shooting.

After 1 million shot simulations, he used big data analysis to come to a practical conclusion: if you shoot from multiple angles within 12 feet (about 3.7 meters) of the basket, you will hit 20% more cricket than an empty brush. (To be continued.) )