The huge chessboard was presented in front of Ling Yu's eyes, and there were not many chess pieces attached to it. A lot of ideas suddenly arise in my head. According to his own inference, the chess pieces he found must be the key to opening another door, but he did not explain how these chess pieces should be placed on the chessboard. Even though I had just placed all of them on the board, the surrounding environment still hadn't changed in any way.

Looking at the chessboard in front of you, generally speaking, the normal Go chessboard is an odd number of lines, the common ones are nine lines by nine lines, and a little higher is thirteen lines by thirteen lines, and nineteen lines by nineteen lines. But the chessboard in front of me is very strange, it is an even number line, a twenty by twenty chessboard. And just now Ling Yu saw that the numbers on the top and right of the chessboard correspond to each line.

Why is this chessboard designed this way? And looking at the numbers on it, their colors are not the same, the numbers on the top of the board are black, and the numbers on the right side of the board are white, is this referring to something specifically?

Black, white? Kuroko, white ko?

Yes, could it be that the black number on it refers to the black seed in the jar just now, and the white number on the right refers to the white child. This would explain why there aren't many pieces in the jar, because they don't have more than twenty, more than the number of lines on the board.

If the board is thought of as a coordinate, and the numbers above and to the right represent the direction of the coordinates, then the number of blacks and whites may be the exact point.

Thinking of this, Ling Yu immediately counted the number of black and white on the chessboard.

"One, two, three..."

After Ling Yu's statistics, in the two jars just opened, there are a total of fourteen black seeds, and a total of twelve white seeds, so if you look at it, find the line corresponding to the black number marked with fourteen on the chessboard, and then find the line marked with the white number of twelve on the right side of the chessboard, and the point formed by the interweaving of the two lines, there must be something strange there.

Following the two lines she found, Ling Yu approached the point formed by the two lines, and she tried to tap the point with her hand, and then tried to tap the point next to it, and the sound made at that point was different from the others. It looks like there must be something behind this intersection.

After that, Ling Yu took out the knife he carried with him, and stabbed it at the target point he had just locked, and a dark box was opened at the intersection of the two lines, and it seemed that his guess this time was not wrong. Ling Yu saw that the camera obsca behind the chessboard was not large, but there was a long box inside, and she reached out to take it out.

When he opened it, he was presented with a silver key in front of Ling Yu's eyes, and in addition to this, there was a crystal-like crystal-like object, which I don't know what it was used for. But this silver key should be used to open another door, and when she took the cabinet key to open the door just now, the appearance of the lock hole still had a little impression in Ling Yu's mind.

She looked at her watch, and now two hours and forty minutes had passed, an hour and twenty minutes before the time the crow had said the bomb had exploded. I have to hurry.

The silver key quickly inserted into the rusty keyhole, and with a slight twist, another door opened, Ling Yu smiled, got up and pushed the door open, and walked into another room with the crystal object found in his hand.

After coming to another room, Ling Yu looked at this room, the light in this room was a little dim, and the room was equipped with a table, sofa, stove, and candles, like a Western family hall, and the main light source still came from that stove. On the table, there is food that has cooled but not spoiled, turkey, sausages, etc., and there is a small box that is not locked. Looking around this room, there are murals of various famous artists, as well as the works of master painters, and on the west wall, a sculpture of a devil carved on the wall, which is holding a fork in his hand, seems to want to swallow everything in the world.

And there is a door next to this sculpture, it seems that it should be the door to the next room, so in this way, this must be another secret room, the answer to enter the next room, must be in this room, when she walked to the position of the other door, but was surprised to find that this door actually has no lock cylinder, no handle, so how should this door be opened.

At this moment, Ling Yu's mobile phone rang again, and she took out her mobile phone, which was a text message from the crow:

"When the Holy Grail is devoured by demons, angels descend with tears to welcome the world into heaven."

What does that mean? Tips? Ling Yu didn't understand, it should be used, she looked at the room, if this text message was a reminder to herself, the demon must be referring to the sculpture of the demon carved on the wall just now, what is the angel referring to?

She walked towards the front, wandering in front of the famous pictures hanging on the wall, most of those paintings were made by famous artists, and most of them depicted Western gods, in front of a picture, Ling Yu saw that the painting was the god Zeus, Zeus is a character in ancient Greek mythology, and most of the angels are from Christianity and Islam, belonging to the messenger next to the god, conveying the will on behalf of the god, therefore, this painting should have no connection.

Later, Ling Yu stopped in front of another painting, which depicted a child with wings playing in the clouds, and Ling Yu knew that angels had wings, and did not know what was behind the painting.

She tried to take the painting down, but she didn't know what it was fixed to the wall, and she couldn't take it down, and then she studied the surface of the painting, tried to press it in many places, and found that there was no mechanism on it. Because the message mentions that the angel is in tears, but she looks at the painting, and the child in the painting only has a smile on his face, no tears at all, and Ling Yu has also tried that there may be a mechanism in his eyes, but after trying to press the eyes, he didn't find anything strange.

Instead of looking for the famous paintings, she went to the table and looked at the food on the table, the food was already cold, so the smell was not very strong, it seemed that the crow had moved them here shortly before she came here. She looked back and forth at the food, and then glanced at the small box on the table, and she picked it up, but it was unlocked.

Opening the box, Ling Yu saw that inside the box were four cards, which were marked with the four suits of the playing cards: squares, clubs, hearts, and spades.

What are these cards for, and now I don't have time to think about this, Ling Yu took out his mobile phone again, and looked at the prompt sent by the mobile phone just now, by the way, the demon, I have been looking for an angel just now, ignoring the demon.

Ling Yu walked over to the demon sculpture on the wall, and she observed that there were gaps on all sides of the sculpture, and the four gaps on the top, bottom, left and right formed a rectangle to enclose the sculpture. Could it be that there is a secret door behind this sculpture?

She looked at the sculpture of the demon, with its bloody mouth wide open and its fork held high, looking horrible, and at the same time she thought about the hint given by the crow, when the chalice was devoured by the demon, she looked at the demon's open mouth, and there was a long groove in it, which looked like it was going to be inserted into something like a card.

By the way, didn't you just find four cards marked with the playing suit? Demons, devouring, grooves, cards, holy grails, playing cards, these elements poured into Ling Yu's mind together, and suddenly, Ling Yu seemed to think of something.

I heard Chu Ming say before that the playing cards originally came from the tarot cards, and the four suits of spades, hearts, squares, and clubs on the playing cards represent swords, wine glasses, coins, and clubs in the tarot cards. If you add this to the hint, the chalice refers to the wine glass, and the wine glass refers to the hearts from the four suits you just found.

It must be like this, the card inserted into the groove in the demon's mouth must be hearts.

Ling Yu picked up the card of hearts, carefully put it into the groove, and then took out his hand, after the card was inserted, the demon sculpture suddenly changed, it began to shake slowly, and then reversed from the center along the gap around it, the demon sculpture went to the back of the wall, and the content behind the wall just now also reversed to the position of the demon sculpture just now.

When the sculpture stopped turning, Ling Yu looked at the sculpture in front of her.

It's an angel!

When the chalice is devoured by demons, angels descend with tears, which is exactly what it means. When the sculpture of the demon is reversed behind the wall, the sculpture of an angel carrying white wings appears in front of Ling Yu.

However, this is not the end of the story, the angel is going to tears, Ling Yu saw that there was a groove under the eyes of this angel sculpture, as if something should be put in it. She reached for her pocket and reached for it, the crystalline object she had just found in the previous room, and she looked at it, its shape matching the groove under the angel's sculpture's eyes.

It turns out that these are the tears of angels.

Ling Yu placed the crystalline object in his hand into the groove under the angel sculpture's eyes, and the crystal angel tears glistened in the light of the furnace, and the dazzling light pierced Ling Yu's eyes.

Immediately afterward, the door without a lock cylinder next to the sculpture began to flutter slightly, and after a while, the entire door automatically pushed towards the right, and the entrance to the next room was opened.

Ling Yu looked at the angel's tears on the sculpture, if he didn't judge that the heart was the chalice card just now, and inserted other cards into the demon's mouth, according to the crow's nature, this room might explode directly, thinking about it, it was like a fire spewing out of the demon's mouth to swallow everything in the world. And in the end, the ashes that are left after all this has been burned, accompanied by the black feathers brought by the crows, so that the angels will shed crystal tears.

Fortunately, what he was thinking in his mind did not happen, Ling Yu turned his head, the corners of his mouth raised slightly, and walked into another room.