All four mahjong tiles are touched by themselves, called dark bars.

The lever is actually downward, so no one can see it. You can see some dark bars, depending on the situation.

Common processing methods of bright and dark stripes in mahjong;

Beginners should carefully consider and weigh the advantages and disadvantages when playing mahjong, and should not play leverage whenever they encounter cards that can be opened. Because in most mahjong, there are many kinds of rice mouths, the enlightenment bar has only increased fourfold, but it has lost the harmony in front of the door.

There is another situation, that is, there are other cards in a stack of three cards. When the next family plays the fourth card, they will immediately open the bar, so it is redundant to fold the cards; If you don't open it, then the formed partner will be easy to get out of the card.

At this time, if you have other pairs in your hand, you should touch them first and keep one to continue the combination, so that you can draw chess in the future. Besides, when other partners are in a group, you can take out the rest of your hand and open it. So if you can't open it, you should use it flexibly and remember to drive impulsively.

However, in the bloody battle of Sichuan Mahjong, leverage is the main scoring method, so there should be leverage. On the other hand, if you have a plate that can be used as a lever, you should also see the lever, because the plate is special and cannot be linked with other cards.

If you have touched or eaten cards, it is hopeless to clear the door. If you can separate the three cards in your hand and see the lever, give yourself another chance to touch the cards.

There is a hidden bar in my hand, and I usually don't play in the first few rounds of card grabbing. Generally, it is played when the cards in hand are basically formed and the cards with hidden bars can be separated independently, so as to have one more chance to grab the cards.

The biggest difference between the hidden bar and the open bar is that the hidden bar can only be opened when you play cards, and others can't open it when playing cards.

References:

Sogou encyclopedia-mahjong light and dark bar