A day at Hogwarts

Everyone picked up firewood and the flames were high. When the snow covered Hogwarts, the player puppets could already fly around the stadium.

But that's not enough, they can't do things other than turning in circles by themselves, the delay when the player controls it is too high, the golden snitch will only fly on a fixed track, and it can't be played yet.

The next step is the most difficult step. It is necessary to let the puppets have a certain degree of artificial intelligence, so that a player can also play by himself, instead of the artificial mental retardation like now.

This required Wood's tactical team to collect and organize various tactical data, and then Percy's spell team would enter them.

This is a meticulous job that requires repeated testing and cannot be completed in a short period of time, so Eleanor paid part of the wages so that everyone can continue after the Christmas holiday.

During the period, several Quidditch teams sent people to visit, and they received unanimous praise and many useful opinions and suggestions.

Charles also took a little time off, and followed Filch to clean up the castle every night.

"Here," Filch pointed to a corridor, "you can go back after cleaning up."

Charles took out his wand to brighten the hallway, and at the same time complained: "Next time I'm asked to catch Peeves, I'll screw his head off!"

There is an oil painting association in Hogwarts. Some students are learning to make GIF oil paintings. Peeves stole their paints and turned the originally clean corridors into a postmodern style.

Filch said to him blankly, "If you can wring his head off, you can help Nearly Headless Nick first."

Charles didn't expect him to tell jokes, so he laughed in agreement, took out his wand and started to work.

Filch is a Squib, and although his parents have wizards, he can't use magic and can only deal with physical methods.

It was cold now, and washing the dye with water would give frostbite to hands, and Filch would have trouble drying it without Charles' help.

"Clean it up!"×N

As Charles cleaned the walls with the Cleansing Charm, he wondered, Where did the things that got rid of with the Cleansing Charm go, did they just randomly appear somewhere, or was there a special place to go?

He thought of Peeves, and wondered if he could treat this guy as garbage and clean it up, and then come back and report where he went.

At this time, Peeves was flying over with a pile of chalk, ready to "add beauty" to the corridor.

He saw Filch, and was about to smash it with chalk, when he saw Charles looking at him with a strange smile on his face, he turned and ran across the wall.

Charles pouted, this guy was running too fast.

"Flying chalk!"

Professor Flitwick appeared, using the Flying Charm to gather up the scattered chalk.

"This Peeves..." the professor said angrily, "I was about to write a lesson plan on the blackboard when he came and stole the chalk."

Then he saw that Charles was using a cleaning spell to clean up a pair of armor that had been poured with red paint in the corridor. He nodded skillfully and said, "Very good, very skilled."

Charles replied with a smile: "Thank you for the compliment, Professor, I am proficient after using it a lot."

Filch couldn't hear this, turned and left,

Professor Flitwick pointed at the paint on the wall with a chalk in his hand and said, "Try again, and try to be as quiet as possible when you chant the spell."

Charles understood that he was instructing himself to cast the first silent spell, and he did so.

He chanted the spell in a very soft voice this time, and waved his wand, pointing at the colorful walls.

Just as the spell hit a stone brick on the wall, the whole wall suddenly vibrated, and the stone brick moved around automatically like the brick wall entering Diagon Alley from the Leaky Cauldron.

A wooden door appeared in front of Charles and Professor Flitwick. The door was inlaid with a whole piece of silver-white metal lightning pattern, and the door was locked.

"Yo hoo!" Professor Flitwick was overjoyed, "There's actually a secret room here!"

Charles was at a loss, thinking how could he touch the mechanism?

"Professor Flitwick," he asked, "what's the matter?"

Professor Flitwick used to put chalk on the corner of the wall, and while studying the metal lightning pattern on the door, he replied: "There are many secret rooms left by the predecessors in Hogwarts. It may be a prank, or some professor left behind it." some things."

"The conditions for the appearance of these secret chambers are not regular. It may be a specific time, or a place like now is hit by a curse."

"Alahoo hole is open!"

Professor Flitwick used the Unlocking Charm, and there was a loud bang of lightning in the corridor, and the metal lightning pattern on the wooden door suddenly came to life, crawling across the door like an electric current.

Charles said: "I guess if you touch the door now you will get electrocuted."

But Professor Flitwick muttered to himself: "How is it possible? The material of this door is very old. It is estimated to be 500 years old, but how could there be an anti-alahoo opening spell? The lock-unlocking spell was only introduced in the 17th century to England."

After hearing this, Charles said, "Professor, could it be that this secret room was once opened and then reused?"

Professor Flitwick thought for a while, nodded and said, "That's the only way to explain it."

What happened next left Charles stunned.

The sound of lightning stopped soon, and the metal lightning finally formed individual symbols.

Professor Flitwick said confidently: "I think, next we will use these symbols to form a secret language. Hehe, this will not trouble our Ravenclaws!"

Charles looked at those "∮", "" and "", frowned and said, "I think I know what it is."

Then using his wand as a stick, he moved the symbols one by one, forming them into

∮D·dS=q

∮B·dS=0

∮E·dl=-B/t·dS

∮H·dl=I+D/t·dS

"Maxwell's equations." Charles said to Professor Flitwick dumbfounded. "The results of a great scientist have a history of more than a hundred years."

"It might have been set up by a Muggle-born professor or student."

He can be sure that this secret room has nothing to do with the old man. If the old man knew this, it would not have taken more than a year to figure out that there is an electricity bill decades ago.

At this moment, the door opened by itself, and the room behind the door looked quite big, with countless lightning bolts dancing wildly like silver snakes. Charles and Professor Flitwick were a little scared and didn't dare to go in easily.

Just now Dumbledore was going to the kitchen to get a nightcap drink, and he heard the sound of lightning on the way and came to have a look.

When he reached the other end of the hallway, he saw Charles and Flitwick facing the wall, looking hesitant.

Then Dumbledore saw that the armor on the other side of the corridor suddenly moved by itself, kicked the two people into the room one by one, and closed the door.