# Deathmatch

Deathmatch Arena

Location

Level 1 of Deathmatch Arena

Bones

No

Mappable

No

Teleportable

No

Diggable floor

No

Diggable walls

No

The deathmatch is an optional quest that takes place in a special dungeon branch, the deathmatch arena, in The November NetHack Tournament. It challenges you to fight a player monster representing a previously ascended character. The arena is accessible via a magic portal on the level immediately above Medusa's Island[1].

Contents

1 Description
2 Map
3 Opponent's base inventory
4 Strategy
5 History
6 Messages
7 Trivia
8 References

Description
The deathmatch opponent has the name, role, gender, experience level, hit points, some intrinsic resistances, and inventory of a random previously-ascended character on the system. Multiple players may end up fighting the same opponent. Their level will be raised to 14 if it was below that, and their hit points will be clamped to a minimum of 100 + [level]d10 + d30, a hard minimum of 200 and a maximum of 500. Contents of containers and names of items are not preserved, wands of wishing, magic lamps and unique items are removed, and all artifacts will be converted to ordinary base items.[2]
Monsters cannot enter or leave the arena through the portal[3] or by following you[4]. Because of this, a character carrying the Eye of the Aethiopica can branchport here to escape followers such as Demogorgon. You cannot enter the deathmatch arena before starting the deathmatch itself if you are carrying the Amulet of Yendor, or any invocation items before performing the invocation. The level is no-teleport.
The opponent will be generated asleep, but will awaken once you move onto the space with the door. Once the opponent has awoken, you cannot branchport out of the arena until they are killed. Contrary to the engravings on the ground, you can leave through the portal; however, if you leave while your opponent is still alive, the portal will be removed and branchporting back in will become impossible[5]. There is no penalty for leaving the arena before the opponent has awoken, or after they are killed.
When the opponent is killed, their possessions will coalesce on the ground where they died. These objects are transient: you will be able to pick up one of them; once you do, the others vanish. Autopickup will not pick up these objects. This includes any weapons or ammo that were thrown at you by the opponent, and anything you stole from them. If you leave the deathmatch arena after starting the deathmatch, all of these objects will disappear except for the one you took after winning; be sure to do so before leaving.
If no player has ascended yet, a generic player monster will be created instead. Their inventory will not be transient as that of a normal deathmatch opponent is.

Map
The layout of the floor is as follows.[6]

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;----------------&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;----}}}}}}}}}}}}}}----&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;----}}}}.....--.....}}}}----&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---}}}}........--........}}}}---&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---}}}........................}}}---&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---}}}.............}}.............}}}---&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;--}}}........--.....}}.....--........}}}--&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---------&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|}}..........--.....}}.....--..........}}|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|@@@@@@@|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|}..................}}...................|-------.......|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|}.....@.................................+............^.|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|}..................}}...................|-------.......|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|}}..........--.....}}.....--..........}}|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|@@@@@@@|&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;--}}}........--.....}}.....--........}}}--&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---------&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---}}}.............}}.............}}}---&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---}}}........................}}}---&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;---}}}}........--........}}}}---&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;----}}}}.....--.....}}}}----&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;----}}}}}}}}}}}}}}----&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;----------------&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Randomly placed in the arena proper are four spiked pits, four bear traps, four land mines, two rolling boulder traps, two fire traps, a sleeping gas trap and a polymorph trap.

Opponent's base inventory
They will be given the following items if they are missing an item in the respective slots, all blessed, erodeproof and +4 or +5[7]:

gray dragon scale mail or silver dragon scale mail, except monks
robe for monks; cloak of magic resistance for wizards; cloak of protection or cloak of displacement for other roles
Hawaiian shirt for tourists; T-shirt for other roles
cornuthaum for wizards; helm of telepathy or helm of brilliance for other roles
gauntlets of dexterity (75% chance) or leather gloves for wizards, priests or healers; gauntlets of power (75% chance) or leather gloves for other roles
small shield or shield of reflection, except monks, wizards, healers, priests and barbarians
speed boots or water walking boots
a weapon, which will instead be +5 to +7:
silver saber for archaeologists or tourists
battle-axe for barbarians
mace for cavepeople or priests
quarterstaff for healers or wizards
long sword for knights or valkyries
short sword for rangers or rogues
katana for samurai
amulet of reflection (80% chance) or amulet of life saving
3-10 lizard corpses
They will also unconditionally be given ranged weapons:

sling and 20-29 flint stones for archaeologists and cavepeople
20-29 +4-5 darts for healers, priests, tourists and wizards
20-29 +4-5 shuriken for samurai and monks
bow and 20-29 +4-5 arrows for barbarians, knights and rangers
10-15 +4-5 daggers for rogues and valkyries

Strategy
The deathmatch opponent will very likely have several attack wands, including at least one wand of death. Magic resistance or reflection is practically required to survive the match, and a defense against petrification is also advisable. Death magic and other attack wands will likely be ineffective against them.
The deathmatch opponent may be wielding a cockatrice corpse or chickatrice corpse. If they are, they may kill themselves by falling into pits. If they do not, you should stay away from them until the corpse rots away. This will prompt them to wield another weapon. A cockatrice corpse may be used to kill the opponent, but it will take several hits to burn through their lizard corpses. Ascending characters often have extremely high AC, so landing a hit will be difficult. Be careful not to fall into a pit yourself. 
When choosing which object to take, consider that they may have been used by the ascending player, e.g. a magic marker may already be permanently dried out. Unfortunately, you cannot safely pick up the objects in order to identify them.

History
The deathmatch was first added to The November NetHack Tournament in 2019.
Initially, the pools of lava in the center of the arena were instead water, and each had two giant eels. This was changed to make it no longer possible to drown the opponent in the pools by freezing the water and then melting the resulting ice.[8] In 2021, two fountains in the entrance room which were removed to stop the same exploit.[9]
There was no restriction on entering the deathmatch arena with any unique items. Theoretically, this could make the game unwinnable if they were left there. Attempting to steal from the deathmatch opponent caused the stolen items to disappear. There was a bug that caused their entire inventory to be stolen and removed at once this way. The deathmatch opponent was always the most recently ascended character on the system instead of a random one, and it was possible to flee the arena with multiple objects that they threw at you or that you somehow obtained during the fight another way.

Messages
You hear the roaring of a crowd.
You hear the clash of steel on steel.
You are on the level with the deathmatch portal.
Upon exiting the portal, you immediately feel on edge.  You feel as if you've stumbled across something very dangerous.  You resist the urge to flee.
You entered the arena for the first time.
A voice echoes in the arena:  "Thou art brave indeed, mortal! Now prove thy prowess!"
The deathmatch has started.
Loud booing follows you out of the arena...
You left the arena during the deathmatch.
A voice echoes in the arena:  "Choose thy trophy from the spoils!"
The opponent was killed.
You see [the opponent's] possessions coalesce into a large pile near you.
The opponent was killed.
You hear a pile of objects jumble together nearby.
As above, when you can't see the objects.
You feel a jarring vibration nearby.
As above, when you are also deaf.
You hear a faint exhalation.
You picked up a transient object after killing the opponent, and all others vanished.
Trivia
If you fled the deathmatch, the #tnntstats extended command will show 'Deathmatch: Bravely Ran Away'. This is a reference to the song 'Brave Sir Robin Ran Away' from Monty Python and the Holy Grail.
References

↑ https://github.com/tnnt-devteam/tnnt/blob/c5d2fa2f4aee18b58c18c827adbd722c2830dea5/dat/dungeon.def#L31

↑ https://github.com/tnnt-devteam/tnnt/blob/094682c847645ffcaed475830c6ff0a4d0a07cab/src/files.c#L4670

↑ https://github.com/tnnt-devteam/tnnt/blob/6bc13a816b89225498353c9eada0aca27b76aa97/src/teleport.c#L1382

↑ https://github.com/tnnt-devteam/tnnt/blob/a8d76e50f64ee71a882efb796b4cdc67e74bcb99/src/do.c#L1350

↑ https://github.com/tnnt-devteam/tnnt/blob/6bc13a816b89225498353c9eada0aca27b76aa97/src/teleport.c#L1063

↑ https://github.com/tnnt-devteam/tnnt/blob/c5d2fa2f4aee18b58c18c827adbd722c2830dea5/dat/npcdeath.des

↑ https://github.com/tnnt-devteam/tnnt/blob/094682c847645ffcaed475830c6ff0a4d0a07cab/src/files.c#L4746

↑ https://github.com/tnnt-devteam/tnnt/commit/3daa921efec09f743274436548abc0a324a1a4c6#diff-d44fd1f10753be45c0184db0c0b5c8906f737bdb1f0c522c20f0988f95438f51

↑ https://github.com/tnnt-devteam/tnnt/commit/427c59fa1896d6ed3fb216b6443d6e6ebcf5a731