The so-called "neurasthenia" was a card game that tested memory and strategy.
Similar to the "number duel," this game was usually played in the form of two or more people.
Play style:
First, he prepared a "deck" of cards, excluding the big and small Kings. Then, he shuffled the remaining fifty-two cards, with their backs facing up, and placed them on the table.
Then, one of the two sides (or multiple parties) would start to flip the cards.
The replicer could flip two cards at a time. If the points of the two flipped cards were the same, the replicer could take the two cards and gain the right to flip two more cards. On the other hand, if the points of the two flipped cards were different, the one who flipped the card had to cover it and change hands.
And so on, until all the cards were flipped, the party with more cards would win.