This is a classroom prepared for small classes, there are three rows of desks, each row of 6, each desk has a 15-lane chessboard, but it is completely empty, everyone stands at the front of the middle row of desks, watching a netizen and a girl play against each other. Pen "Fun" Pavilion www.biquge.info

There were at least a dozen onlookers, but as soon as Du Qiu entered the door, the focus of his eyes was all focused on the girl who was holding a chess piece in one hand and supporting her chin in the other.

This is the badass old lady who threw ice cubes into the quilt in the winter and put spiders on the mat in the summer......

This is the chivalrous old lady who I was bullied and avenged me in front of the whole school......

This is the versatile old lady who dances in front of me in public......

This is the strong old lady who was optimistic and cheerful, and smiled before she died, telling me not to cry......

"Yo, Boss 8 is here!"

"8 Boss also likes backgammon?"

Seeing that Du Qiu was in a trance, Du Chunhua turned a deaf ear to the greetings of netizens, hurriedly pushed him and asked, "Little brother, what's wrong with you?"

"Huh? Nothing. Du Qiu came back to his senses, raised his hand to respond to netizens, and covered up: "My brain suddenly shut down just now, I obviously have something to say, but I can't remember what it is." ”

"Cut, I just said I was confused, I think you're really confused. ”

The arrival of Du Qiu and the others was like a big stone falling into a small pond, destroying the calm and peaceful atmosphere of the game in the classroom, Cheng Yiyuan seemed to be a little dissatisfied, threw away the chess pieces in his hand, and stood up with a hula, his tone was very crisp, and his voice was very crisp and announced: "I lost this game, let's play a tiebreaker." ”

"Everyone be quiet first, and talk about what they have to say when they are done. Du Qiu walked to the chessboard and looked at it, his heart was full of pity and warmth, but he teased in a somewhat astringent voice: "Little sister, it's a bit miserable to lose." ”

"I don't want to play backgammon, I will lose if I play white, I deliberately gave up. Cheng Yiyuan looked up at him and said confidently: "There is a ban in the tiebreaker, I will definitely be able to win him!"

The old lady has not yet developed at this time, except for a pair of big eyes, I can't see how beautiful she is, and she is dressed very plainly, but her small body is straight and straight, like a bud in early spring, like a little eagle with wings, revealing a fresh and high-spirited spirit, which is very cute, so as soon as the words came out, someone immediately cheered: "One yuan is good, my sister supports you, and you win the tiebreaker with 10 yuan." ”

At this time, Du Qiu found that Xiao Wu was also there, sitting at the desk by the window, with a bunch of colorful change in front of him, obviously sitting on the outside of the gambling bank, Lin Jinyan half-knelt on the stool opposite her, holding a few red banknotes of one dollar, like a little gambler, and shouted in a milky voice: "Sister Yiyuan, I also support you, and I will also bet 10 yuan!"

The children's words made everyone laugh, Du Cunzhi stepped forward to pick him up, slapped him on the buttocks, and scolded with a smile: "Little rabbit cub, I didn't discipline you for an afternoon, but I actually learned to gamble, and I have to do it." ”

Chen Zhiyang had been worried about the big black dog at the door, so he stood on the podium with a smile in response to the situation, made a gesture of pressing down with both hands, and urged loudly: "It's not early, hurry up and play, there are other activities in the evening, don't delay." ”

Du Qiu stepped forward and asked while helping Cheng Yiyuan clean up the chess pieces in the previous game, "Do you know the rules of forbidden hands?"

"Of course I know, my dad taught me, otherwise how dare I come to the competition. ”

Heh, so confident?

The old lady has a lively personality, likes to move but does not like to be quiet, and has never played backgammon in the time and space before the time-travel, why did she suddenly turn into a genius chess player now......

In the eyes of many people, backgammon is just a game played by children, and it is difficult to get into the hall of elegance, but in fact, under the constraints of professional rules, backgammon is a very technical chess sport.

If we make an analogy, Go is a national-level battle, Xiangqi is a regional-level war, and backgammon is a battle in an elevator, in a narrow and fierce environment, the knife is the first, and the first player has a great advantage, so as early as 1899, Dongying chess players found that if there is no limit, the black chess that moves first can win 100%, and this idea was proved by mathematics and computers in 1992.

In order to limit black, after many years of exploration, the Dongying people invented a set of rules, called the forbidden hand, prohibiting black chess from playing double three, double four, long consecutive and other layouts, even if it is for defense, forced to play out, which not only reduces the probability of black winning, but also adds a new way to win for white, without the use of five pieces to form a line, as long as it can force black to get out of the layout that should not be taken, it is considered a win.

This set of rules is prepared for professional competitions, more cumbersome, amateurs will be difficult to adapt to for a while, so the Internet conference adopted a compromise of three games and two wins, the first two games are not forbidden, one person holds black once, if the score is 2:0, it means that the strength gap is very large, there is no need to compare, if it is 1;1, it means that the strength is relatively similar, you can use the rules of the forbidden hand to decide the winner.

In addition to the ban on the tiebreaker, there is also a rule of five hands and two hits, which means that when black moves to the fifth hand, two pieces with asymmetrical positions should be placed on the chessboard, and white chess will decide which one is considered a fall, which is a new rule that appeared in 1988, because after decades of development, people have found that even with the ban, the winning rate of black chess is still far higher than that of white, and it has to be limited again.

"Do you negotiate to choose Othello or flip a coin?"

Cheng Yiyuan imitated the common actions in costume TV dramas, raised his right hand flat, made a gesture that you would like to invite first, and said: "I'm casual, you can choose." ”

Her eyes are clear, her expression is serious, her sitting posture is the same as her standing posture, she is very straight, showing respect for her opponent and a serious attitude towards the game, although the action is a bit nonsensical, but it does not make people feel funny and ridiculous, but has a calm atmosphere, polite and courteous demeanor, Du Cunzhi saw this and said to Du Chunhua: "This little girl is good, she does things like when you were a child." ”

"I think it's a bit like that, too. ”

The netizen sitting opposite was a fat man with a square head and big ears, whose screen name is "Big Head Fish", may have been infected by Cheng Yiyuan, and did not show the arrogance or humility of adults to children, but took out a coin and said: "Toss a coin, whoever guesses right is black, so fair." Which side do you choose?"

"I choose the national emblem. ”

As a result, Cheng Yiyuan guessed wrong, got the white chess, and the big-headed fish got the black chess, and as soon as the two started, they only played four chess pieces, and Du Qiu pinched a cold sweat for the old sister, feeling that she was going to lose nine times out of ten.

When Du Qiu went to Osaka as an exchange student, in order to experience foreign culture and hook up with foreign girls, he had participated in the interest club in the school and studied it carefully for a while, so I heard that my mother was watching a backgammon game, so I came here temporarily.

In the professional game of backgammon, there are a total of 26 types of opening, of which Hanazuki and Puzuki are recognized as the two most advantageous black chess, even if you add the ban and five hands and two dozen restrictions, there are still more than three ways to win, and even use software to find the BUG-level "carpet score", "carpet score" means that black chess does not care about white chess at all, step by step to go their own, even if the opponent is the world champion, in the end it will be able to win.

The big-headed fish used Huayue at the beginning, if he memorized some kind of must-win chess game and followed a fixed routine, the old lady would be more auspicious......

However, in 1995, there was no official professional backgammon tournament in China, and there should be very few people who knew how to win......

Just when Du Qiu was thinking wildly, the big head fish played two black pieces in a row on the fifth hand, and Cheng Yiyuan took the one that threatened her the most, completed the five-hand doubles, and then played the sixth white chess in the G10 position on the left.

"It's bad, this move is wrong, you can't prevent black chess at all, you should play in ......"

"Shhh, watch chess and don't say anything, true gentleman, don't talk nonsense. ”

Du Chunhua gently touched Du Qiu with his elbow and asked his opinion with his eyes, Du Qiu did not rush to express his position, but waited for the big head fish to play the seventh chess move, put his hands together as a microphone, and whispered to his mother to bite his ears and say, "I have won." ”

"Really?" Du Chunhua stood on tiptoe, looked at the chessboard with only 7 chess pieces in total, and said in disbelief: "You can see it now?"

"You ask Mr. Cheng, he seems to be going out. ”

Du Chunhua looked up and saw that Cheng Siwei, who was originally standing behind Cheng Yiyuan, gave up his position to a short netizen, and walked towards the door, so he asked, "Teacher Cheng, where are you going?"

"I'm afraid that Xiaotian will scare netizens passing by and go outside to watch it. ”

When Cheng Siwei walked to the door, Du Qiu raised his index finger, turned his wrist, and drew a somewhat playful horizontal hook on the back, signaling his mother to follow, Du Chunhua felt the banter in it, glanced at him fiercely, and whispered: "It's not the chess played by Teacher Cheng, how would he know." ”

Du Qiu smiled but did not speak.

After the start of Huayue, black chess has at least three ways to win, but Cheng Yiyuan's move seems to be weak in defense, in fact, after the 6th move that hides the killing machine is played, black chess has only one way to win, and the 7th move is very critical, there are only two points to play, if you don't see it, play in the wrong place, and it will soon collapse and lose.

The old lady is a strange girl with developed motor nerves, even if she suddenly becomes a wonder woman or a super killer girl, I believe it, but I don't believe that she will become a genius chess player......

This kind of very skillful trick must have been conceived by the stepfather of the chess fan who eats all the games of Go and chess......

is worthy of being a special teacher, the stepfather is really enough, the Internet Conference Preparatory Committee only released the news of the backgammon competition in July, and he was able to figure out the rules in just over a month, not only trained the old sister, but also tailored a lore move for her that does not need to remember too many steps......