Codeseum

    Codesport · the duel format

    Two competitors. One clock.

    Codesport is head-to-head competitive coding: same trial, same start window, same tape requirement, one result that moves the ladder.

    60-second match window·Winner Elo ×1.25 · Loser Elo ×0.40·48-hour scoring window

    Most Codeseum attempts are solo. Codesport is the live format: two competitors accept the same trial, start together, and submit under the same scoring rules. The difference is pressure. Somebody is on the other side of the clock.

    • · Open Compete and enter the duel queue.
    • · Two competitors accept the same trial within 60 seconds.
    • · Preflight checks the feeds, screen, and engine declaration.
    • · The match starts when both competitors are ready.

    MARK is decided when the clock stops. The run that passes more checks wins; if both pass the same checks, faster time breaks the tie. The winner earns the standard Elo move plus the public Codesport modifier. The loser takes the normal loss only.

    ROOM (peer vote) and FINDINGS (judge review) on a Codesport tape only count toward your rating if they're cast within 48 hours of the duel ending. After that the tape stays up, but the live result is closed. A duel is a moment, not an open-ended appeal.

    One ladder. Solo runs and duels both move the same number. The duel modifier is fixed and public — no caps, no secret math.

    • · Winner: + Elostandard × 1.25
    • · Loser: − Elostandard × 0.40
    • · No caps. Beating someone above you still pays more — that's already baked into standard Elo.
    • · You risk less than you stand to gain. That's the deal that keeps duels getting accepted.
    • · Peer (ROOM) and Judge (FINDINGS) points apply only inside the 48-hour window after the duel ends.
    • · Same engine policy as solo — declare it before the run.
    • · Disconnects inside the first 90 seconds void the duel. After that, the clock keeps running.
    • · One duel at a time per competitor. No background queueing while you're mid-run.
    • · Tape removal follows the standard takedown rules — only Codeseum can pull a duel tape, and only for cause.

    Solo tells the room what you can do. A duel tells the room you can do it while someone else is trying to do it faster.

    Open the duel queueSee the standings