The young man observing next to the chess set is named Mamiya Takato, and he is the son of Mamiya's eldest daughter.
I learned from Tian Yan Shengnan that there is a secret hidden in this castle. As for what the secret is, no one knows yet.
Because the old lady suffered from Alzheimer's disease and the great master had died, no one knew this secret.
However, from the Grand Master’s last words, the secret may be related to chess.
In other words, if you want to unlock this secret, you must first understand what secrets are hidden in chess.
After watching the chess game, Tian Yanshengnan took Situ Xiu and others into the castle. They saw several portraits in the hall of the castle. One of the portraits was of the great master, with his wife and Mr. Zhenzhao on the left and right.
"Mr. Zhenzhao, who is married to me, respects me very much as a historian. Our wife is often jealous of this, and even said to Mr. Zhenzhao..."
Tian Yan Shengnan was telling Situ Xiu and others about the relationship between the people in the portrait, but was interrupted before he finished speaking.
"She often says that dad is just an intellectual who likes to reason." A voice came from behind everyone.
"Right?"
Tian Yan Shengnan looked back and shouted quickly: "Old Madam...".
Situ Xiu and others turned around and looked back, and saw an old woman sitting in a wheelchair, with gray hair and a wrinkled face.
This should be the wife of the deceased great master.
"The child's father also knows about this, but he is not angry at all when he hears such things, but is very happy!" the old lady said.
Hearing this, Situ Xiu thought to himself: "Of course, it is his own child after all. No matter what he says, he will not blame him."
Seeing what the old lady said, Tian Yan Shengnan scratched his head nervously and said, "I'm sorry for reminding you of unpleasant things."
"No need to apologize"
The old lady looked at the portrait in the middle of the hall, and then said: "I am used to the days when he is not around."
"Just like the round shape of banknotes and the size of passports have changed, you will not get used to it at first, but you will get used to it as time goes by."
"Time is very scary, all the joys, sorrows and joys will disappear with time."
Everyone was slightly stunned. Situ Xiu held his chin and thought deeply. These words came from a person with Alzheimer's disease, and it felt a little wrong no matter how you read them.
"By the way, who are they?" the old lady turned to look at Situ Xiu and the others.
"They are my master's scientist friends," Tian Yan Shengnan explained.
"the scientist?"
The old lady looked at Dr. A Li and said, "It's really exciting. We must ask them to decipher the code left by the master."
"Secret code?" Everyone's expressions changed.
Seeing this, Tian Yan Shengnan explained: "It was the last words left by the master before his death, saying that he would give his treasure to the person who unlocks the secret code of the castle."
"Oh..." Dr. A Li nodded, it must be related to the chess game just now.
"By the way, my daughter hasn't arrived yet?" the old lady looked around and asked.
"Ah..." Tian Yan Shengnan was stunned for a moment.
"Isn't she going to come back today to celebrate my birthday?" the old lady continued to ask.
"..." Everyone.
Is this an onset of Alzheimer's disease?
"Tell her to come to my room immediately when she comes back. I'm waiting for her!" After that, the old lady turned the wheelchair with both hands and left slowly.
"The old lady has been like this since the fire in the tower..." Tian Yan Shengnan said.
"Maybe he was greatly stimulated!" Dr. A Li said.
Looking at the old lady leaving, Situ Xiu frowned slightly and said, "How strange."
"What's weird?" asked Hui Yuan Ai at the side.
"Isn't she a little senile? But what she said just now seems to have such a good memory, but she forgot about her daughter's death," Situ Xiu said.
"Have you never met someone with Alzheimer's disease?" Haibara lamented.
"Does watching it on TV count?" Situ Xiu looked at Haiyuan and asked sadly.
"....."Haibara Ai.
Situ Xiu curled his lips. He had never come into contact with people suffering from Alzheimer's disease so far. He had only seen written introductions and people who had Alzheimer's disease on TV. Anyway, people suffering from this disease could not remember anything.
"If she got Alzheimer's disease because of the stimulation of that fire, her memory may have stayed at that stage, and she doesn't want to remember the person who died, or she doesn't want to believe that the person is dead," Haibara lamented.
"Forget it, don't worry about this, it has nothing to do with us anyway," Situ Xiu said with a faint smile.
"You brought it up, okay!" Haiyuan Ai rolled his eyes at Situ Xiu and said something about Alzheimer's disease. As he gets older, all kinds of diseases come with him.
"Emmm..." Situ Xiu was speechless. The teacher taught him that if he didn't understand, just ask. He was still a child.
Conan was very interested in the secret code the old lady said, and guessed it might be related to chess, so he asked Tian Yan Shengnan where he could see the chess in the courtyard from the room in the castle.
The group of people was taken to a certain room in the castle by Tian Yan Shengnan. From the window of the room, they saw the chess set in the courtyard below.
"Wow, that's great! You can see the chess pieces arranged so neatly from here!".
"Where? I can't see it!".
"Yunta, don't squeeze!".
The three naughty children were shouting and crowded into a window.
"Why squeeze in a window? Isn't there a window in the next room?" Situ Xiu said.
"That's right!" Yuantai's eyes lit up and he immediately ran to the window of the next room.
“Wow, you can see it from this room too”
Mitsuhiko heard Genta's voice and ran over.
Only Ayumi was left at the window in this room, while Conan was sitting on the floor, taking out paper and pen and drawing something, with a deep thought on his face.
"Don't you want to unlock the code?" Hui Yuan Ai looked at Situ Xiudao on the side.
"Isn't there someone who is solving it?"
Situ Xiu pointed at Conan, then looked at Haiyuan Ai and said, "Besides, I'm not interested in detectives. I like to chat with classmate Xiao Ai."
Huiyuan was stunned for a moment and looked at Situ Xiu for a few seconds. A strange color flashed in his eyes and he slowly said, "You are just a child. What are you thinking about?"
If it were Haihara Ai in the past, he would have said cold words directly, "I don't like chatting with you, and I don't like little brats either."
"Uh...I didn't think about anything. I just wanted to chat with you. Isn't that okay?" Situ Xiu pretended not to understand.
"That's all?" Hui Yuan Ai opened her eyes wide. Is it because her thoughts are not simple anymore?
"What else can I do?" Situ Xiu looked at Hui Yuan Ai with his big eyes, pretending to be confused.
"Uh..." Hui Yuan Ai was speechless as he chatted with Situ Xiu. He always felt that he was not chatting with a child, so he unknowingly entered another state and did not treat him as a child.
"Hey, what are you two doing? You will fall if you do this."
Ayumi, who was lying by the window, suddenly shouted.
When Conan heard this, he quickly got up from the ground, leaned on the window and took a look outside. His expression changed and he said: "This idiot."
Then he saw Genta outside the window of the next room. At some point, Genta climbed out of the window and came outside. Mitsuhiko held Genta tightly with both hands.
"Misuhiko, don't let go!" Genta's face changed with fright. Below was the courtyard. If he fell down, he would become a meat pie.
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