On October 4th, in Rokkenjima, Rudolf was playing a game of chess against his new chess partner Mion.

At 8pm, the game was still going and Rudolf decided to call the servants for tea.
Kanon asked Genji if he could do it since he loved to see a good game of chess, and was ordered to do so.
He arrived at the door a short time later with the tea and was amazed by the tempo of the game.
He was even able to hear them from the outside of the room:
“You won’t get away with this kind of trick, Mion-kun!”
“Tsk, you have experience at this, Rudolf-san, but this is not over! ”
Kanon bowed, knocked on the door and said
“Im very sorry to interrupt you, but I brought the requested tea.”

The one who opened the door was Mion, Rudolf was still at the chess table, thinking about what would be his next move. Mion asked him politely to give him the tea and to go back, since they were in the middle of the fight, but Kanon wanted to see the game by himself. He wanted more, he asked them if he could stay for a while, they agreed.

At 8:30pm, the 3 of them were still in the room, but something unexpected happened.
Rudolf had finally corned Mion, and while waiting for Mion to play, started to show off his incredible knives skills. When Mion was finally ready to play, he suddenly got sick. He seemed like he wanted to throw up very badly, and had to go to the bathroom. The moment he tried to stand up, he was splitting blood out of his mouth and it went everywhere on the table, some of it even reached Rudolf, but he blocked it with his knife. Rudolf was so shocked, he asked Kanon to go get help and helped Mion to reach the bathroom.

When Kanon came back with Genji, the door was locked. They knocked on the door, and even had to cut the chain before entering since no one answered. What they found was really shocking. Mion was in the middle of the room, lying on his front side, dead. There was a massive pool of blood around him, and blood inside of the bathroom. Rudolf was nowhere to be seen.
The only window of the room was closed and locked from the inside.


Both the killer and the victim were in the same room when the murder happened, the victim was shot point blank with a gun.

The victim was not shot with a gun.

Whether or not it killed him, Mion was poisoned.

Mion was not poisoned.

The victim is already dead at the start or the narration, he never woke up.

The victim was still alive at the beginning of the narration.

Mion was killed by a knife, probably the knife mentioned as "Rudolf's knife"

The killer killed Mion with a knife. However, how did Rudolf escape?

The killer was in the same room when he killed the victim.

The killer was not inside the room when the victim died.

Rudolf escaped via the window. Perhaps an autolock or if it was locked behind him by Mion.

Rudolf did not use the window inside of the room to escape.

The victim was killed by a trap set up inside of the room.

No such trap exists within the room

Rudolf did not escape the room. He was brought out of the room by some external force, or is still in the room.

Rudolf is not in the room anymore.

The trap was set up inside of the victim body and killed him.

The victim did not have any trap set up inside of them.

Rudolf is not the culprit.

Rudolf is not the culprit... Yet, he still disappeared.

The killer used a trap to kill the victim.

The method of murder involved a trap.

Somebody moved Rudolf out of the room, probably Kanon.

Nobody moved Rudolf out of the room.

The victim suicided with his owen trap.

It was a homicide, not a suicide.

Rudolf ran away on his own after witnessing Mion's death

Rudolf did not put the chain on the door. Kanon did not put the chain on the door.

The killer is dead.

The killer is still alive.

The chain wasn't put on the door. By definition we will have to say that this refers to the way it is properly applied, though there may exist methods to force one to cut the chain even though it is not "put on"

When Kanon came back with Genji, the chain was on the door.

The trap is the murder weapon.

The trap delivered the murder weapon, the trap was not the murder weapon in and of itself

Genji put the chain on the door.

Genji never touched the chain.

The trap shot the murder weapon at the victim. The murder weapon is a sharp object.

The murder weapon was not a sharp object. Nor was it a blunt object which was delivered with such force that it acted like a sharp object.

Mion put on the chain lock

Mion put on the chain lock.

The trap released poison that killed the victim.

The victim was not poisoned

Mion set the chain lock after Rudolf left the room via the door.

When Mion set the chain, Rudolf had not left by the door.

The trap activated a gas that is not poison but acted like it and killed the victim.

The murder weapon was not a gas

Kanon killed Mion.

Kanon was outside of the room when Mion died.

The murder weapon caused the victim high pressure before he died.

The victim did not die from high blood pressure.

Mion did not die instantly from the knife wounds. Like I said, Kanon is the culprit.

When Mion was given the killing blow, he could not do any action.

The victim suffered Hemorrhage before he died.

No hemorrhaging occurred.

The killing blow was dealt through the gap that can be made between the door and the door frame after the chain has been set.

No killing blow was dealt through that gap.

The victim used the item delivered by the trap and caused his own death without comitting suicide since he did not know that using the item would kill.

The victim died by means employed by the culprit which did not include the actions of the victim. That is, the victim didn't do anything to cause their own death.

A trap was used.

No traps killed Mion.

The trap removed the air from the room.

The method of death entered the room. If the room were made into a vacuum, that would not fit this definition.

The killing blow was not dealt by Kanon. Still, Kanon is the culprit.

Kanon did not give the finishing blow on Mion. How can he be the culprit?

Something filled the room then, the trap filled the room with a substance.

The trap filled the room with a substance

Mion's action(s) led to his own demise, but Kanon is still the culprit.

Kanon is not the culprit.

The substance killed the victim. He slowly died as the substance filled the room.

The substance killed the victim. But what is this "substance"?

Genji is the culprit.

Genji did not have any chance to kill Mion.

The substance is liquid.

It's a liquid. But what liquid and how was it delivered into the room?

Suicide. Mion killed himself with the knife after applying the chain lock.

Mion suicided. That doesn't explain Rudolf's mystery.

It was water, the liquid was filled by a hole that relies to the outside.

Correct, the room was filled with water. One last part then: explain how sufficient amounts of water was used to flood the entirety of the room to kill the victim.

He exited via the door. Then Mion applied the chain lock and suicided.

Rudolf did not exited via the door before Mion suicided.

A water pump, relied to a fire hydrant.

The water was not from a fire hydrant. Nor was a pump used.

Rudolf escaped after Mion suicided. Perhaps the gap in the door is large enough even with the chain lock applied, or perhaps he escaped while Kanon and Genji were checking Mion's corpse.

Rudolf did not escape after Mion suicided.



A trap opened and let water flow into the room from the outside. Outside of the room was waterMaybe the room was in a lac, pool , ocean, watertank.

Correct, the room was a barrel which was submerged in the ocean. The room itself was the trap. As the barrel sank, it would begin to crack under the water pressure, until it burst open.