One Key World Cup 2025

One Key World Cup 2025 (1KWC 2025) was a country-based 2v2, double-elimination osu!mania 1-key tournament hosted by Jaye.

Tournament schedule

Prizes

Placing	Prize(s)
	profile badge

1KWC 2025 winner badge

Organisation

Links

• Discussion thread
• JOKE Discord server
• Livestream
• Tournament bracket
• Spreadsheets

  • Master
  • Statistics

Participants

Podium

This competition has come to an end and resulted in the following podium:

Placing	Team
	Japan (Grape_Tea, hz404, [Crz]yomogi237, SORA_T4kAhqSh1)
	United States (Sleeby Maddy, Sydosys, ERA Basil, ERA Dev)
	United Kingdom (MiniEgg_23, Sparxe, Teezel, Zoobin4)

1KWC 2025 podium

Mappools

Grand Finals

• Classic

  1. cYsmix - Arcade Busters (Sparxe)
  2. w_tre - Shannon's Theorem (Sparxe)
  3. Krimek - The Dark (Jaye)
  4. Chroma - Field : Kaerezu no Chi (Jaye)
  5. technoplanet - Intuition (Jaye)
  6. Marmalade butcher - Floccinaucinihilipilification (Sparxe)
  7. UNDEAD CORPORATION - Embraced by the Flame (Jaye)
• Old

  1. t+pazolite - !!!Chaos Time!!! (Jaye)
• Fan

  1. stereoberry - ametsuchi ([Iron]) [downpour]
  2. BEMANI Sound Team "PHQUASE & ZAQUVA" - QQ (FORMless000) [MAGNUM OPUS]
  3. 1KWC (-Kori)
• New

  1. KASHIWA Daisuke - Aqua Regia (Cut Ver.) (Jaye)
  2. Xeven - MMXVI (Jaye)
• Tiebreaker

  1. TB | BilliumMoto & rN - 1KOSAHEDRA (Jaye, -Kori, [Iron]) [1NF1N1TY]

Finals

• Classic

  1. BilliumMoto - 1xMISS (Sparxe)
  2. LeaF - Kyouki Ranbu (Jaye)
  3. seatrus x Se-U-Ra - Weiss Schwarz (r1chyy)
  4. Creo - Challenger (Jaye)
  5. Jun Kuroda - Cybernetics (Jaye)
  6. Yooh - Heracles (Sparxe)
  7. Se-U-Ra - Tsui no Maihime (Jaye)
• Old

  1. fallen shepherd feat. RabbiTon Strings - ENDYMION (Jaye)
• Fan

  1. ZxNX - Schadenfreude (Sparxe) [Expert]
  2. MisomyL - Desive (superSSS) [Last Dream]
  3. Zekk - Quantum L3ap (hz404) [Rice]
• New

  1. Andromedik - Don't Say (osu! edit) (Jaye)
  2. Trina Lydia - Late-Night Rocket Ride (Jaye) [Distance]
• Tiebreaker

  1. Cansol - Train of Thought (Jaye)

Semifinals

• Classic

  1. Fractal Dreamers - Gardens Under A Spring Sky (Jaye)
  2. NIWASHI - Astronote. (Jaye)
  3. tokiwa - Syuou Sange (Sparxe)
  4. Street - Hestia (r1chyy)
  5. OISHII - COCOA WATERSLIDE (r1chyy)
  6. Rabbit House - Gehenna (Jaye)
• Old

  1. Chaos City Niigata - Ukiyoe Yokochou (Jaye)
• Fan

  1. pm04034 - sn4pside (alemagno333) [pianito]
  2. We Own the Night (ERA Basil)
• New

  1. awfuless - Temptation (Jaye)
  2. Ardolf - FragmentOf(soul) (Jaye) [Radiance]
• Tiebreaker

  1. Xyris - Reikoku Assassins (Jaye)

Quarterfinals

• Classic

  1. A-One feat. Rute & Aki - Scream out! (Cut Ver.) (Jaye)
  2. ICDD - Danzai No Honoo To Koibito-Tachi No Rondo (Jaye)
  3. Yunosuke - GLAZ (Jaye)
  4. IAHN - Transform (Original Mix) (Jaye)
  5. Aethral - It's Boss Time, dude (Jaye)
  6. MDK - Press Start (Jaye)
• Old

  1. sky_delta - Midnight City Warfare (Jaye)
• Fan

  1. Cansol - 1,2,3,4! (Teezel) [1,1,1,1!]
  2. Thaehan - Doki-Doki (NamesAreRubbish) [1k Crazy Godmode]
• New

  1. 0 K - Luminous * Ciel (Jaye)
  2. MYUKKE. - Seal the Deal (Jaye) [Alliance]
• Tiebreaker

  1. Kou! - Youkaikakushi Nijyusekai (Jaye)

Round of 16

• Classic

  1. James Landino - Hide And Seek (Jaye)
  2. Sound Souler - Aqua Stars (Sparxe)
  3. PTB10 - Aeronautica (Jaye)
  4. False Noise - Space Angel (Cut Ver.) (Jaye)
  5. Rohi - Slan Leat (Jaye)
• Old

  1. E.G.G. - Got noir forever. (Jaye)
• Fan

  1. Shounen wa Sora wo Tadoru Prog Piano Remix (arpia97)
• New

  1. Grant Bowtie - Cloud Nine (Jaye)
  2. ZxNX - NULLPARS (Jaye) [Elegance]
• Tiebreaker

  1. Our Stolen Theory - United (L.A.O.S Remix) (Jaye)

Round of 20

• Classic

  1. Origami Angel - The Title Track (Jaye)
  2. Fuki - Zekkai no Juliet (Jaye)
  3. Celldweller - Senorita Bonita (Jaye)
  4. Miss Bass & Rusty K - Palm Shot (Edit) (Cut Ver.) (Jaye)
  5. BLANKFIELD - Half Ghost (Jaye)
• Old

  1. ESTi X M2U - Obelisque (Jaye)
• Fan

  1. Jimmy Weckl - Icicles (Paturages) [Stalactite]
• New

  1. my sound life - waterflowing (Jaye)
  2. siqlo - Beyond the Decision (Jaye) [Defiance]
• Tiebreaker

  1. Dazuko as "Kazuya" - Pixel Love (Feeling Naughty) (Jaye)

Qualifiers

1. nekodex - Moonlight Feast (Cut Ver.) (Jaye)
2. Kagetora. - Reimei (Jaye)
3. Akiri - Backlash (Jaye)
4. Virtual Self - Particle Arts (Jaye)
5. Ben Briggs - Fearless Living (Jaye)
6. Krimek feat. eili - Aquira (Jaye) [Entrance]

Match results

Grand Finals

Saturday, 7 June 2025:

Team 1			Team 2	Match link
United Kingdom	3	7	United States

Sunday, 8 June 2025:

Team 1			Team 2	Match link
Japan	7	2	United States

Finals

Saturday, 31 May 2025:

Team 1			Team 2	Match link
United States	7	0	China
United Tingdom	7	0	Furnited States
United States	7	0	United Tingdom

Sunday, 1 June 2025:

Team 1			Team 2	Match link
Japan	7	0	United Kingdom

Semifinals

Friday, 23 May 2025:

Team 1			Team 2	Match link
Sweden	6	1	Idkdonesia

Saturday, 24 May 2025:

Team 1			Team 2	Match link
China	6	0	Australia
Japan	6	1	United States
Mexico	6	1	66% Canadian

Sunday, 25 May 2025:

Team 1			Team 2	Match link
Mexico	3	6	China
Furnited States	6	1	Peru es clave
United Kingdom	6	1	United Tingdom
Furnited States	6	0	Sweden

Quarterfinals

Saturday, 17 May 2025:

Team 1			Team 2	Match link
Japan	6	0	Sweden
Mexico	1	6	United Tingdom
Random States A	0	6	66% Canadian

Sunday, 18 May 2025:

Team 1			Team 2	Match link
United States	6	1	Furnited States
Norway	2	6	Australia
Idkdonesia	6	4	Mixedonesia
Taiwan	0	6	Peru es clave
United Kingdom	6	4	China

Round of 16

Saturday, 10 May 2025:

Team 1			Team 2	Match link
United Kingdom	5	0	Taiwan
66% Canadian	0	5	Sweden
United States	5	0	Norway

Sunday, 11 May 2025:

Team 1			Team 2	Match link
Furnited States	5	0	Australia
Japan	5	0	Random States A
Peru es clave	0	5	China
Mexico	5	2	Idkdonesia
United Tingdom	5	0	Mixedonesia

Round of 20

Saturday, 3 May 2025:

Team 1			Team 2	Match link
Japan	5	0	Australia
Random States A	5	3	Croatia
Norway	5	0	Autobahn Avengers
Furnited States	5	1	66% Canadian

Sunday, 4 May 2025:

Team 1			Team 2	Match link
China	1	5	Mexico
Idkdonesia	5	0	Poland
United Kingdom	5	0	Mixedonesia
Random States B	1	5	Taiwan
United Tingdom	5	1	Peru es clave
United States	5	0	Sweden

Qualifiers

Seeding results are calculated based on rank sum across the 6 qualifier stages, with average score used to break ties. The results of the Qualifiers can be found in this spreadsheet.

Ruleset

Tournament Information

1. One Key World Cup 2025 (1KWC 2025) is a 2v2 tournament with team sizes of 2-4.
2. Beatmap scoring is based on Team VS, ScoreV2.
3. All maps used in the tournament are dedicated 1-key osu!mania maps.
4. The tournament is Free Mod: players are allowed to use Hidden, Fade In, Flashlight, Mirror, any of the xK mods, or No Mod.
5. The NF mod may be used but is not mandatory; failed scores do not count to the end result.
6. If a map ends in a draw, it will be replayed. If the map ends in a draw again after this, the Picker's Privilege rule is envoked: the team that picked the map will be awarded 1 point, and the match will proceed as normal. In the unlikely event that a draw happens on the tiebreaker map, the map will be replayed until a winner is decided.

   • Teams cannot win a match via the Picker's Privilege rule. In cases where this would occur the map will be replayed until a winner is decided.
7. If a player disconnects, they are treated as if they failed. Map aborting for a "false start" is up to the referee's discretion (and is guaranteed to take place if a disconnect occurs within the first 30 seconds of a map).
8. The usual osu! rules apply; therefore, macroing and the likes is strictly prohibited. If you want to be 100% safe, please just use one key for input. If you want to try something unique out for yourself, don't hesitate to ask staff if your play method is allowed.
9. Please be kind to other players and members of staff; referees have the ability to issue punishments to players or teams based on the severity of rudeness/disruptiveness.

Registrations

1. The registration form can be found both on the Master Sheet as well as in our Discord server.
2. Participants are required to both complete the form and be a member of our Discord server. This is for identification/legitimacy of registration purposes and for convenience in posting updates about the tournament. If the registration form is filled out and the user is not present in the server when the registration phase is concluded, they will automatically be withdrawn from the registrant list.
3. In cases where a registration for a full team has been completed, the first player listed will automatically be designated as the team captain (this may be changed). In all other cases the captaincy will be discussed by the team members once a team is constructed.
4. It is possible for some regions to merge if desired, and other countries to have multiple teams (i.e. A-team and B-team). If captains are interested in this, please contact the tournament host to discuss.
5. There are no restrictions for signing up: any rank, any mode, any region is allowed. Please note that the osu! tournament staff hold the right to screen you out of the tournament.

Stage Instructions

1. The first weekend will be the Qualifiers. Team captains will nominate a day/time for their team to participate. All teams will then play through the Qualifiers mappool, followed by a 5 minute break (the teams may opt to skip this), and then through the Qualifiers mappool for the second time (the teams may opt to skip playing certain maps again, or the whole pool).
2. Following Qualifiers will be the Round of 20.

   • Teams seeded 1st - 12th will play in a no-elimination match where the higher seeded team will fight to retain their seed; if the lower seeded team wins this matchup, both teams will swap seeds heading into the Round of 16.
   • Teams seeded 13th - 20th will play in a single-elimination match with the winner advancing to the Round of 16. Their seed will be equal to the higher seeded team of their respective matchup.
3. The Bracket Stage (following the Round of 20) is double-elimination.
4. The winning condition for each stage is as follows:

Match Instructions

1. A referee will create a multiplayer room approx 10 minutes in advance. Players must gather during this period.
2. Room settings are Game mode: "osu!mania", Team mode: "Team VS", Score mode: "ScoreV2". Room name must be 1KWC: Qualifiers ({team}) for Qualifiers, and 1KWC: ({Red Team}) vs ({Blue Team}) for every other round.
3. Teams will be listed as having forfeited should they fail to gather at least 2 eligible players 10 minutes after the scheduled match time.
4. This tournament will not feature warmups.
5. There will be no bans in this tournament.
6. The team captain must use !roll in #multiplayer. If the captain is unavailable, a member of that team must be nominated for the roll.

   • The winner of the !roll will proceed to pick the first map of the pool.
7. In case of a tie at the penultimate point needed to win, the tiebreaker map will be played.

Mappool Instructions

1. There will be one mappool per week.
2. The maps used in this tournament are all from the JOKE series of tournaments (JOKE, JOKE2, and JOKE3) complemented with a handful of new maps. The pools for each round will be revealed after the conclusion of all matches in the previous round.
3. Mappools do not contain mod categories, but are instead categorised as follows: Classic, Old, Fan, New, Tiebreaker.
4. The size of the mappool will increase by 2 when the win condition calls for it (see Stage Instructions).

Scheduling Instructions

1. Each stage will be held on a single weekend.
2. Scheduling will be handled by the staff team; match times will be based on the local times of the participating countries.
3. To successfully complete a reschedule, the agreement between the captains of competing teams must be provided (excluding Qualifiers, where teams are free to pick a lobby time that they wish to enter).
4. The deadline for rescheduling is always Wednesday, 23:59 UTC. The latest a match can be rescheduled to is Sunday, 19:00 UTC. Times outside of this range or reschedules requested after the deadline are subject to staff availability and may be rejected.