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GTT ©2026 — More than a HackBarcelona · --:--

GTT

Més que dades.(More than data)

Five people, one question: who has the ball? We turn raw tracking data into possession, frame by frame — reproducible, measured, explained.

Meet the squadFollow on GitHub

Live · Phase 1

Ball possession

Initial Challenge · online

spellF1 to beat
0.2433
Deadline in
--d --h

Barcelona20 Oct — 17 Nov

  • Tracking data
  • Homography
  • Possession
  • spellF1
  • Smart Tagging
  • Python
  • Reproducible science
  • Barcelona
01 — The challengePhase 1 · online

Who has the ball?

For every frame of a full LaLiga match, say which team has the ball. One CSV, one row per frame, scored against a private frame-by-frame ground truth — no jury, just a number.

The tracking is automatic and uncorrected: gaps, identity switches, and a ball nobody can see for long stretches. That is the game.

  • HHome in possession
  • AAway in possession
  • DDead ball
  • XNo answer
Our fork of the challenge
Frame 011185 · 25 fpsH — Home in possession
Ball not tracked
−40 sPossession spellsNow

Home 50%50% Away

    Simulated players — not match data. Dashed line: nearest player to the ball, the official baseline's idea. Dashed ring: the ball the tracking lost.
    frames to label
    199,319
    home, away, dead, no answer
    H·A·D·X
    scored frames with the ball unseen
    41%
    baseline spellF1 to beat
    0.2433
    02 — The squad1-2-2 · 5 players

    The squad.

    Five players, one shape: a 1-2-2 built to keep the ball.

    Up front
    Edu · Pablo
    At the back
    Nico · Jimy
    In goal
    Alejandro

    Hover or tap a player for their links

    03 — ApproachHow we work

    How we play.

    Our goal is not just to build a solution, but to understand why it works, how it can fail, and how to improve it.

    • Data analysis
    • Algorithm development
    • Evaluation & validation
    • Engineering
    1. 01

      Reproducible by default.

      Every number we report regenerates from the repository with one command. If it can't be rebuilt, it isn't a result.

    2. 02

      Measure before we believe.

      spellF1 and macroF1 on the public window, plus our own validation — before any claim leaves the team.

    3. 03

      Know why it fails.

      Tracking gaps, identity switches, an invisible ball. We study the failure modes, not just the score.

    4. 04

      Built together.

      Small pull requests, written decisions, shared notebooks. Five people, one codebase.

    04 — Fixtures2026 — 2027

    The fixtures.

    1. 20Oct 2026

      Kick-off

      Match data released. The Initial Challenge opens online.

      All teams

      —

    2. 17Nov 2026

      Phase 1 deadline

      Possession CSV, public repository and technical write-up.

      All teams

      —

    3. 26Nov 2026
      → 14 Jan 2027

      Innovation Challenge

      Open analytical and tactical questions on the same data.

      Top 20

      —

    4. 02Mar 2027

      Final Pitch

      On stage at Talent Arena, in front of a professional jury.

      Top 5

      —

    05 — FollowBarcelona

    Follow the build.

    We share our approach, code and write-up as the competition allows. Star the repository, or just say hola.

    github.com/GTT-TalentArena