listen to riddles

Gu Qiao here had just left the police station to deal with the vicious wounding incident, while Tan Yuhe over there had already taken a taxi and returned home. He didn't stop at home, so he took the key and went to the parking lot to drive, and went straight to Sun Hai Liu family.

Sun Hailiu's house was a little far away from the urban area, and when Tan Yuhe arrived at his house, it was just in time for Sun Hailiu to go out.

With a briefcase in his hand, Sun Hailiu looked at Tan Yuhe in surprise: "Xiaohe? Why did you come to me so early?"

"Teacher, there is one more thing I need to ask you." While Tan Yuhe was speaking, Sun Hailiu took out the key from his briefcase and opened the door that was locked just now, motioning him to enter the room.

Tan Yuhe was not polite at all, and went straight into the house. Sun Hailiu followed him into the door, and hung the briefcase in his hand on the hanger just after entering the door.

"Sit casually," Sun Hailiu asked after finishing speaking, "Would you like some water?"

Tan Yuhe shook his head: "Teacher, I'm not thirsty. I'm here today to confirm one thing with you."

As he said that, Tan Yuhe took out from his windbreaker pocket something similar to backgammon that Qian Xi was holding tightly in his hand before he died, and handed it to Sun Hailiu through a sealed bag.

After Sun Hailiu took it, Tan Yuhe said: "Teacher, your judgment is indeed correct. The key in Xiao Jian's clock is indeed related to a third person, and we have already found the third person, which is Qian Xi." , but we went one step too late, she died, died of spontaneous combustion, she was holding this thing tightly in her hand when she died, I suspect that this thing may have something to do with the fourth deceased, I and the Gu of the Criminal Investigation Department The director has studied for a long time and found that this is very similar to the sunspots in backgammon, but he is not sure. I remember that you used to like playing chess very much, and backgammon was your favorite, so I want to ask you to confirm whether this is backgammon The sunspot inside, after confirming, we can also investigate the fourth person."

Sun Hailiu nodded, and his eyes shifted to the thing that Tan Yuhe handed him just now. It was very smooth and mirror-like, and it really looked like backgammon.

But after Sun Hailiu looked at it for a while, he insisted: "This is not backgammon. Although it is very similar to backgammon, it is much bigger than backgammon, and it is much higher than backgammon."

"Could it be on a relatively large backgammon board?" Tan Yuhe said, "I think there are also those kind of larger backgammon pieces."

Sun Hailiu didn't answer, just said "wait for me a while", got up and went into the study.

When he came out, he was holding a wooden box in his hand.

Sun Hailiu put the wooden box on the table in front of Tan Yuhe's sofa. After opening it, Tan Yuhe discovered that it was a backgammon.

Taking out a black chess piece from the wooden box, Sun Hailiu handed it to Tan Yuhe and said, "Gobang chess pieces are divided into black and white. More than 0.8 cm, the diameter should be slightly smaller than the distance between adjacent points on the chessboard, so as not to affect the chess on the board, but you see what you just gave me, its thickness is obviously more than ordinary chess pieces, not to mention , It is also very heavy, and of course it does not fit the big chessboard you mentioned, but one more thing is certain that it is not backgammon, and its shape is not oblate, but it looks like a semicircle to me."

"It's like..." Sun Hailiu thought for a while and seemed to be looking for an adjective. After a while, he spoke again: "It's like a round object that was forcibly cut in half."

"The round object looks like it was cut in half..." Tan Yuhe looked at the black object in the sealed bag and muttered to himself before asking: "Then can you tell what material it is?"

Sun Hailiu shook the sealed bag with her hand, felt through the bag again, and said with some uncertainty: "I think it looks like marble from the color and weight. Just now you said that Qian Xi died of spontaneous combustion. Since it is self-igniting, there must be a fire. She is holding this thing tightly in her hand, and it will not be burned. I think it is very likely that it is made of marble."

Then he handed the sealed bag to Tan Yuhe, and after Tan Yuhe took it, he stood up and said to Sun Hailiu, "Since it has been confirmed that it is not backgammon, the students should go back and take it to identify what material it is made of." , this case is a bit urgent, after the students solve this case, come to drink tea and chat with the teacher."

"Okay, this case is not so easy to solve!" Sun Hailiu said kindly and kindly: "Every student I have taught has an exam given by me after graduation. Then you went back to Songshi directly, so you still owe the teacher a test, right?"

Tan Yuhe didn't deny it, but nodded: "The student went back to Songshi directly after graduation. He did miss the teacher's exam."

"Haha" Sun Hailiu laughed loudly, and said, "I think this case is very difficult, it is considered as an exam given by the teacher, and when you solve this case, you will officially graduate from me!"

Although Tan Yuhe didn't know why Sun Hailiu took this case as his graduation exam question, he still nodded in agreement.

Seeing Tan Yuhe nodding, Sun Hailiu also got up and patted him on the shoulder, and said with relief: "I won't keep you anymore, don't you have other things to do? But I still have something to say to you, You are my student, Sun Hailiu, don't embarrass me!"

After Tan Yuhe solemnly responded, he turned and left Sun Hailiu's house.

After getting into the car, Tan Yuhe was inexplicably agitated. Now the time given to them is getting shorter and shorter. He doesn't know when the fourth person will die, but he doesn't even know what the black object is. How can he find out? ?

At this moment, Tan Yuhe felt the vibrating sound of the phone in his pocket, he reached out and took out the phone, it was Gu Qiao calling him.

After pressing the answer button, Gu Qiao's voice reached Tan Yuhe's ears: "What's the matter, what did your teacher say? Is that thing backgammon?"

Squeezing his temples, Tan Yuhe replied: "The teacher said, that thing is not backgammon, I'm planning to test its material."

Gu Qiao was silent for a while, and then his gentle voice rang in Tan Yuhe's ears: "When I went to the bathroom last night, I saw that the light was still on in your room, so I opened the door to see You were writing and drawing analysis cases on the small blackboard in the room. I wanted to go in and tell you to go to bed early, but I didn’t go in because I knew you would not listen. mine."

Tan Yuhe's hand holding the phone gradually tightened. He did analyze the case very late last night, but he did not expect that Gu Qiao would actually see it.

"Don't put too much pressure on yourself, and don't push yourself too hard. Some things can't be solved in a hurry. Tan Yuhe, you should know that you still have me..."

Gu Qiao paused and then said: "You and us, everyone in the investigation department does not want to see you pressing yourself so hard, you need to calm down now, no matter how good the game is, it will be broken in the end ,I trust you."