（263...... 084...... 458...... Book friend skirt, if you want to come, join the group. P.S. Friends who have passed by ask for collections and recommendations, and your support is my biggest motivation. In addition, it is good for everyone to give more opinions, thank you. PS2: The title of the book has been changed, please see the work related)

"If that's the case. Catherine stared at the map and said to herself, "I'm afraid that these three moons really contain some hidden information, otherwise no one would be bored enough to depict the moon according to strict angles and positions." ”

"Yes, after confirming that, I thought about it further. "If the moon is drawn in reality, then the intention of the person who made the drawing is certainly not just on the moon, but certainly in relation to other things related to the moon," Pannis explains. So I had two bold ideas: first, although the shape and characteristics of the crater are drawn at random, will there be some special information like the moon? For example, the scale of some data and other things, so I calculated the ratio between the height of the pothole, the radius of the hole and the radius of the bottom of the cave on the map, and calculated the inclination of the rock walls on both sides of the cave in the map, maybe I can use these opportunities to determine the specific pothole in the map. ”

"What about the second?" Catherine listened to Pannis's explanation, "What is the second idea?"

"The second idea is to look out through the hole. Pannis pointed to the sky above his head and said: "On that day, the position of the three moons will not change, in a hundred-meter-deep hole, it is not easy to see the full moon light, so as long as you estimate the position of the three moon light that night, and then test whether you can see the angle shown in the picture from all angles at the bottom of each cave, you can confirm it." ”

"Well, I'll admit, I basically didn't understand a single word of your two ideas. Catherine hugged her head in distress and said, "The only thing I understand is that you have to estimate the position of the moon, and that thing can also estimate it? ”

"Well, this, that's common sense. Pannis suddenly discovered Catherine's other side, the corners of her mouth twitched slightly, and she explained with a smile: "Different months, different days, different times, the approximate position of the moon on the canopy, this person who knows a little about astronomy will know, I estimated it with Vivien." ”

"Whose common sense is like this. Catherine's cheeks were slightly red, and she couldn't help but say loudly: "Moreover, when did astronomy become common knowledge, different months, different dates, and different times, who would remember this kind of academic theoretical things, things that have nothing to do with battles and adventures, how can anyone remember them?"

"Well, you see, didn't Vivien and I both memorize, and anyway, we remembered, didn't we, hehe. Pannis covered her mouth and smiled: "Or is it that a certain knight lady with a brilliant and resolute image is so lacking in knowledge ......"

"You die. Catherine glared angrily, but in the end she could only exhale, hung her shoulders weakly, and said whimfully: "I see, so you look up at the sky as soon as you reach the bottom of the pit, just to estimate whether you can see the moon from this angle?"

"Pretty much. Pannis nodded, "But instead of seeing the moon, looking for the same scale and angle as on the map." ”

"I don't understand. Catherine glared at Pannisy with a dangerous gaze, and said in a very affirmative tone: "No matter what the proportion, angle, perspective, or other messy things, anyway, in the end, it is to look at the moon." ”

"Yes, yes, yes. Pannis smiled wryly and raised his hand in surrender: "We just look at the moon." ”

"So, you go through these two observations. Catherine's eyes drifted to the side, not looking at Pannis's eyes, and changed the subject: "Have you confirmed that these two potholes are not targets?"

"If my guess is correct. Pannis said: "Then these two pits can basically be ruled out." ”

"What if it's wrong?" Catherine asked, "what if you don't find a spot that fits?"

"That means there's something wrong with my idea. Pannis spread his hands: "Anyway, we have seven days, and if we are wrong, we will study it again, what does it matter." ”

"Makes sense. Catherine said in a stiff voice that lacked emotion, "It would be more convincing if you hid the snicker on your face a little better." ”

"Hahaha, that's just a misunderstanding. Pannisy took the lead in escaping and climbed up the rock wall, and said with a smile as he climbed, "I'll go up to see the moon first, you hurry up and follow." ”

"Bastard, don't I just be a little poor in knowledge, what's ridiculous. Catherine cursed angrily, and couldn't help laughing after scolding, sighing while laughing, and crawled out of the hole after Pannis.

――――――――――

When Vivien woke up, the first thing she saw was Catherine's face.

It was dinner time, and Catherine was about to go into the tent to wake her up, and Vivien had already woken up on her own. Vivien, who had just woken up, opened her eyes blankly, her body motionless and silent, her eyes rolled around in confusion, and it took a long time for her drowsy mind to reflect what she was doing. Vivien, who had finally regained her consciousness, lay quietly for a moment before slowly sitting up, tentatively stretching her arms and curling her fingers, before nodding with satisfaction and grabbing Catherine's outstretched hand and standing up.

"It's getting dark, and it's time to eat. Catherine's voice was gentle: "How did you sleep?

"It's been relieved a bit, and it doesn't hurt for the time being. Vivien said, "I just don't know how long it lasts." ”

"Now that you've relieved yourself, you can go back to sleep tonight. Catherine said: "In the past few days, you should not do too many activities except for necessary things, and take advantage of your free time to replenish your overdrawn mental strength." ”

"Well, thank you, eldest sister. Vivien was not polite, and simply accepted Catherine's kindness: "How did you go to investigate today, did you find the entrance?"

"Well, I guess I found it. Catherine said uncertainly: "You better ask Pannis, he explained for a while, and then Lina and I rushed to get water." ”

"Hahaha, you're still the same. Vivien laughed and coughed, gasping and said, "This is the tragedy of lack of knowledge, hahahaha." ”

"You give me about the same. Catherine pressed Vivien's head and rubbed her blue hair: "You go and discuss it with him, we really can't stand it, he's crazy." ”

As soon as he stepped out of the tent, the first thing he could see was the crystal lamp lit next to the campfire and the white paper spread on the ground, and Pannis was lying on the ground, crawling around with the light, constantly recording on different sheets of paper. Finding Vivian coming out, Pannis seemed to see a savior, and said urgently: "Vivian, come on, help me calculate, my computing ability is still much worse, and I am about to die by these numbers." ”

"Give me honest food. Catherine roared angrily, completely dispelling Vivien's eagerness: "No one is allowed to write until they have finished eating." ”

"Yes, Captain. Pannis was so frightened that he jumped up on the spot and jumped directly to the campfire: "Eat now, never write." ”

"Well deserved. Lina, who had gone to inform Ellad of the meal, happened to come back, saw Pannis's embarrassed appearance, and snickered and said, "I should have let my eldest sister scold you like this a long time ago." ”

Vivien also sat down, took the plate handed by Catherine, but her eyes glanced at the paper on the ground, glanced at it casually, and suddenly said, "It seems that there are two possible places?"

"Yes, that's the biggest headache. "Pannis" held the plate, but his mind was not on eating at all, and he mechanically stuffed the food into his mouth" found two holes, both of which met the requirements of our two conjectures. Whether it is calculated from the ratio of height and radius, or from the position and angle of the moon, the conditions for conjecture are fully satisfied. ”

"So to speak. Vivien forgot to take out the fork in her mouth, and said vaguely: "Either our conjecture went in the wrong direction from the beginning, or there was a third condition hidden in the map, and we didn't find it." ”

"Well, I'm more inclined to hide that there is a third condition. Pannis said: "After all, the first two conditions have coincided, if this is just a coincidence, it is too far-fetched, and the person who drew the map is not sick in the brain, there is no need to create such a coincidence." Of course, if this is a misleading attempt by the people of the Naryn royal family to confuse others, then it is another way of saying it. ”

"You're not done. Catherine said dissatisfiedly, "It's already a headache for me to have Vivien in a constant state of frenzy, how can you learn to go crazy with her, Pannis?"

"Sister, you don't understand. Vivien happily replied, "The beauty of this puzzle game is that it's fun to find the right clues little by little through the few conditions, and then find the answer through those clues, right, Pannis." ”

"Eun, that's right, that's right. Pannis was covered in a cold sweat by Catherine's glare, buried his face almost entirely on the plate, and said vaguely, "It's funny, Eun." ”

"I really don't understand. Catherine turned her annoyed gaze to Vivien again, "But I know that if you talk like this and skip food, you will not be allowed to participate in this treasure hunt again." Don't challenge my determination, this is the last warning, there is no next time, give me a good meal. Especially you, Vivien, if you do this again, I won't even take you out next time. ”

"Big sister, I was wrong. Vivien bowed her head very skillfully and kicked the gloating Lina by the way, pouting and concentrating on the food on the plate.

"There's still plenty of time. Catherine sighed and explained, "Don't rush these dozens of minutes, we will listen to the discussion between the two of you after dinner." Moreover, it is difficult to find out thoroughly just by discussing like this, and when it is dawn tomorrow, let's go down to the field together to investigate, isn't it better than guessing out of thin air like yours? Therefore, you should not be so anxious, and everything must be done step by step. ”

"Well, okay big sister, listen to you. Vivien finally recovered from her frenzied puzzle-solving state, nodded and said, "It's decided, I'll go down tomorrow to investigate." However, this puzzle is really interesting, I didn't even notice it at all, and if it weren't for Panis's conjecture about the three moons, I would have been fooled. Haha, eldest sister, I have a hunch from this point that we will definitely gain a lot this time. ”

"I hope so. Catherine shrugged: "But I always feel that in the past few years, your hunch has never been possible, hehehehe." ”