Chen Chuyao chose to move towards the center of the labyrinth, but because the labyrinth was too big, although it was closer to the center of the circle, the curvature of the high walls on both sides did not seem to have changed much, from this point of view, there should still be a lot of distance from the center of the labyrinth.

Since you can't walk directly from your current position to the center of the circle in the direction of the radius, it will take you a long time to get to the center of the circle.

Chen Chuyao continued to walk in a clockwise direction, but he didn't go far when he found that there was a dead end in front of him, and a high wall of equal height on both sides of the road was in the middle of the road, blocking the way to continue forward.

Chen Chuyao was not surprised, after all, now that she was in the labyrinth, she had no luxury of expecting to walk to the center of the labyrinth smoothly.

Although it was a dead end, a closed door appeared on the wall at the end of the road.

Chen Chuyao came to the door to check the situation at the door.

I saw that there was a monitor about 30 inches on the simple door, and when Chen Chuyao approached the door, the monitor automatically played.

Chen Chuyao carefully looked at the content playing on the screen.

In the center of the screen is an equilateral 9-sided shape, each vertex is marked with a number, from 1 to 9, and each vertex is connected to another 8 vertices in pairs, forming a dense network of equilateral 9-sided polygons.

Underneath the graph is a long list of text:

Colorize the lines on the graph one by one with two colors, blue or red. By connecting three or four external number points, can you color all the line segments without drawing a single red triangle or blue quadrilateral? (You have 3 chances to try)

Underneath the text is a gray box, like where you can enter the content. On the right side of the graph are two dots in blue and red.

After Chen Chuyao read the puzzle on the screen, he reached out and touched the blue dot, and the dot of light that followed his fingers turned blue. Chen Chuyao tried the red dot again, and the cursor turned red again.

Then Chen Chuyao tried to use his finger to swipe over one of the number dots on the screen to another, and as the finger moved, the white line between the two numbers turned red with the movement of the finger.

Before she could finish drawing the first line, Chen Chuyao withdrew her finger, and the half-drawn red line disappeared.

At this point, Chen Chuyao has fully understood the game principle of the puzzle given on this screen, and the next thing to do is to find a way to solve this puzzle.

Chen Chuyao guessed that if he could solve this puzzle, he might be able to open the closed door, and as for what was behind the door, he could only reveal it after waiting for the door to be opened.

Chen Chuyao carefully read the topic again, searching for relevant memories in her memory.

Chen Chuyao remembered that he had seen a problem called 'Party of Six Puzzles' in a book of logical reasoning, which required that 3 people who liked each other should not form a group, nor should 3 people who hate each other form a group. The puzzle is reduced to a regular hexagon composed of 6 points, and blue represents mutual hatred, red represents mutual liking, and the requirement is that after connecting all 6 points to each other, there can be no blue or red closed triangles, and it is clear that the puzzle in front of you is an upgraded version of the party of six puzzle.

Although the number of vertices has only increased from 6 to 9, the difficulty of the puzzles has increased exponentially.

Chen Chuyao carefully stared at the 9-sided shape, simulating the possible connection results in his mind, and no matter how he looked at it, he felt that it was difficult to come up with the correct answer after 3 attempts. If you had a pen and paper at hand, you might be able to do a calculation and try it again after you get the correct answer, but now you have nothing at hand, so you can only try it on the screen except to simulate it in your mind.

Chen Chuyao knew that he didn't have the ability to simulate such a complex puzzle in his brain, so the only way was to try it directly on the screen, but he had just come to the conclusion that it was impossible to complete this puzzle in just 3 attempts.

Suddenly, Chen Chuyao fell into a dilemma.

In the midst of her thoughts, a flash of inspiration flashed through her, and she thought of the Ramsey principle she had once studied, in which the Ramsay number R(m,n) can represent the blue node, n can represent the red node, and R represents the minimum number of nodes.

In this way, a complex puzzle of connecting lines can be transformed into a simple mathematical formula, but only if you know the algorithm of the formula.

After calculation, Chen Chuyao was surprised to find that when the nodes reached 9, it was impossible to color all the lines without drawing triangles or quadrilaterals of the same color anyway, which means that this puzzle is unsolvable!

"Could it be that this puzzle is a trap for the player?! There is no answer to this puzzle! ”

While thinking about it, Chen Chuyao carefully read the entire puzzle again.

"Can you color all the line segments without drawing a single red triangle or blue quad......"

Chen Chuyao read the title softly, and suddenly discovered the mystery.

It turns out that the whole problem seems to require the player to color all the lines, especially the parentheses indicate that there are 3 attempts, so most people will assume that the puzzle can only be solved by coloring all the white lines.

Because Chen Chuyao used the Ramsay formula to calculate that the puzzle was unsolvable, he had doubts about the puzzle, and after reading through it again, he found that the real question was actually a right or wrong question, asking whether all the lines could be colored under the premise of meeting the conditions. In this case, the answer is simple, 'no'.

Chen Chuyao, who had reached the conclusion, tried to write the word NO with his finger in the gray box.

Immediately, the 9-sided shape and the puzzle all disappeared, and the familiar image of the hot girl suddenly appeared on the screen, and happily said to Chen Chuyao: "Congratulations! Answer correctly...... Please enter the safe house! ”

Before the words fell, the closed door opened.

Chen Chuyao pushed open the door and looked inside, only to see that it was a boxy room, empty, with only a square box in the center of the room.

Chen Chuyao entered the room, turned around and closed the door, only to hear a 'click', it should be the door locked again.

Chen Chuyao tried to open the door again, and the locked door opened in response, which showed that the door could be opened at any time from the inside, and then looked at the screen on the door, and the interface of the puzzle was restored.

Chen Chuyao thought of the name of the 'safe house' that the hot girl had just said, and guessed that this room should be able to walk out of the room at any time from the inside, but if you want to enter this room, you must solve the puzzle, so that the person who solves the puzzle can temporarily hide in this room.

At the same time, Chen Chuyao had doubts, if those who were the prey also solved the puzzle, or if there were already people in the room and someone solved the puzzle, what would happen?

Chen Chuyao thought about it as she entered the room again, walked to the square box, leaned down and opened the box.

"Gun ......!"

Chen Chuyao screamed in surprise.

It turned out that there was something in the shape of a pistol lying in the box.

Chen Chuyao was surprised because since the era of big data, the vast majority of thermal weapons, including guns, have been destroyed by super artificial intelligence, and the army has also been disbanded. So in the real world, even the police have never touched guns and ammunition.

Chen Chuyao thought about it, this is in the metaverse, and it doesn't seem uncommon to have a contraband like a gun, so he took out the black pistol from the box. I guess this should be the weapons and equipment that the Spice Girls host said about for member players.

Chen Chuyao once read an introduction to firearms in an encyclopedia and had an understanding of the basic structure of firearms.

Chen Chuyao took the gun in his hand, first checked the safety, then took off the magazine to check the bullets inside, and at the same time checked the situation of the bolt and the chamber, which was basically the same as the record in the book. After loading the magazine, Chen Chuyao held the gun in both hands, aimed it at the smooth wall opposite, and pulled the trigger.

"Bang ......!"

The first time he heard the sound of the gun, Chen Chuyao was a little surprised, and he couldn't help but be startled, but fortunately, he was holding the gun in both hands, and the action of holding the gun did not appear deformed. This is also due to Chen Chuyao's training in the use of stun guns.

Chen Chuyao then checked the front of the gun, where the bullet was deeply embedded in the smooth wall, leaving a single hole about 5 centimeters in diameter. The power of this pistol is really great, if it hits the human body, if it doesn't die, it will also be seriously injured and incapacitated.

"What if those who are prey manage to get into this safe house and thus obtain this weapon?" Chen Chuyao looked at the gun in his hand and fell into confusion, "If that's the case, wouldn't it be that the prey also has the ability to counter-kill member players?!" But the Westerner had said before that when the player hunted others, there would be no danger, could it be that there are some rules that he doesn't know that restricts the actions of the prey?! ”

I thought about it for a moment, but nothing came of it. Chen Chuyao decided that he could not stay here any longer, but that he still had to continue to the center of the labyrinth.

So, Chen Chuyao carefully pinned the pistol to his waist, and blocked it with his jacket to ensure that it would not be easily discovered, opened the door and walked towards the road from which he came.

Chen Chuyao, who returned the same way, walked for a while and passed the doorway he had just turned in again, and returned to the original passage to take a look, and found that it was still the same as before, and no one else had come, so he turned back.

This time, Chen Chuyao walked counterclockwise along the current passage......