First, identify from the dice.

Normal dice alignment points are: 6 o'clock opposite 1 point, 5 o'clock opposite 2 o'clock, 4 o'clock opposite 3 o'clock, and the sum of two opposite sides of dice is 7, which is a constant law handed down year after year.

If mahjong machine has installed the program, the number of dice will change (that is, the misplaced dice), because if the program is installed, the positions of opening the door and grabbing the cards will be set according to the rules of the mahjong game, so that the positions of opening the door and grabbing the cards can be switched back and forth (only one point can be scored without switching).

If the number of dice is 6, 1 point from the side, 4 dice, 3 dice from the side, 5 dice from the side and 2 dice from the side, then it is certain that mahjong machine installed the program (that is, misplaced dice), because the front dice is 6, the bottom is 1, and 1 cannot be seen from the side.

Second, use magnets to identify.

If mahjong machine installed the program, there must be magnetic powder in the dice. It can control the number of points on the surface of the dice by installing a coil under the dice tray and generating a Th magnetic field through power-off and discharge, so as to achieve the set order of opening the door and drawing cards. Mahjong machine put a magnet on the dice tray, and the dice inside will shake, which proves that this mahjong is programmed.

Third, through the identification of mahjong tiles using hemp machines.

The mahjong tiles of the programmer must be processed special cards. Make sure it has a program installed, put it in your pocket with the "program card recognizer" and put it outside to check the voice of the "program card recognizer". It will automatically report that it is a program card and report the number of this card.

Extended data:

First, the principle of mahjong machine's cheating

A chip and an infrared receiver are installed in the mahjong machine, and the programmable input in the chip is installed in a mahjong machine switch. Before pressing the dice switch every time, press a remote control key similar to the smart car key. Before shuffling, the mahjong tiles in the machine will come out according to the designed program.

There are four buttons on the remote control, representing four people in different directions. Whoever wants to win can win. In addition, the dice are equipped with magnets, and some mahjong tiles are also embedded with iron wires. People who don't know can't see it at all

Second, the method to prevent mahjong machine from cheating in the remote control program:

1. Take out the dice on the mahjong machine and put them in a magnetic ring or a special mahjong machine card for inspection to see if the dice are magnetic. If so, it can be judged as a program dice. At this point, as long as the dice are changed to non-magnetic, the control can be broken.

2. Before the game starts, the program control is broken by exchanging mahjong tiles with other mahjong machine tiles. Unless the mahjong machine cards handed by the other side are specially treated, the program will not work.

3. When you suspect that there is a program, but it is not convenient to say the amount, you can switch the cards in front of you and turn the leftmost card to the rightmost card, and vice versa, which can prevent 75% cheating.

Baidu Encyclopedia-Program mahjong machine