Sardinia Len Cyber Camp – Capture the Flag Finals

Competition Overview

The CTF Final is divided into two distinct contests, taking place over two consecutive days:

Day 1 – Jeopardy CTF (September 25)

• A classic Jeopardy-style Capture the Flag competition.
• Duration: 12 hours, from 10:00 AM to 10:00 PM.
• Challenge Categories: Crypto, Misc, Reverse Engineering, Pwn, Web.
• Teams will solve challenges to earn points, with increasing difficulty across the board.
• Online collaboration is allowed among all team members throughout the event.
• This contest will contribute to the overall score used in the final ranking.

Day 2 – Sardinia Len Speedrun Arena (September 26)

• A fast-paced, head-to-head contest composed of 5 timed rounds (details below).
• This event follows special rules regarding participation limits and support constraints.
• The score from this contest will be combined with the Jeopardy CTF score to determine the final rankings and podium.

Sardinia Len Speedrun Arena Rules

1. Contest Structure

• Sardinia Len Speedrun Arena consists of 5 rounds, each lasting a maximum of 20 minutes.
• Each round is dedicated to a different CTF category:
  • Crypto
  • Web
  • Reverse
  • Pwn
  • Misc

2. Team Composition

• Only 2 players per team, freely chosen by the team, participate in each round.
• Each player may take part in a maximum of 2 out of the 5 rounds.
• The remaining 3 players are not allowed to intervene, except within the limits of the allowed help (see point 5).
• It is the team's responsibility to strategically manage player rotation while respecting this rule.

3. Round Execution

• Teams tackle the same challenge simultaneously.
• Each round lasts a maximum of 20 minutes.
• A round ends when:
  • Time runs out, or
  • All teams have completed the challenge.

4. Scoring and Bonuses

• In the speedrun challenge, teams earn bonus points based on their finishing order, with earlier finishers receiving more points.
• The maximum score available in the speedrun is equal to:
  MIN(200, 10% of the top team's Jeopardy score)
• Each team’s speedrun score is then calculated using the following formula:
  Speedrun_Score(i) = Max_Speedrun_Score × (1 / i)
  Where:
  • i is the team’s finishing position in the speedrun (1 = first, 2 = second, ..., 10 = tenth)
  • Max_Speedrun_Score is the lower of 200 or 10% of the top Jeopardy score
• Example:
  • If the top Jeopardy team scored 1800 points, then:
    Max_Speedrun_Score = MIN(200, 1800 × 0.10) = 180

  • Placement	Formula	Points
    1st	180 × 1/1	180
    2nd	180 × 1/2	90
    3rd	180 × 1/3	60
    4th	180 × 1/4	45
    ...	...	...

  • If the top Jeopardy score is 3000, then:
    Max_Speedrun_Score = MIN(200, 300) = 200

5. Requesting Help

• During each round, each team may request support once from one of the 3 inactive players.
• Support may last a maximum of 2 minutes.
• Support can only be provided through voice communication, with no screen sharing or remote control.
• The organizers will monitor compliance with this rule.

Behavior and Fair Play

• Any collaboration between teams is strictly prohibited.
• The use of automated tools that violate the spirit of the CTF is prohibited.
• Teams caught breaking the rules may be penalized or disqualified.

Ranking and Winners

• At the end of the 5 rounds, each team’s final score is the sum of the points earned during:
  • The previous day's CTF
  • The Speedrun Arena rounds
• The total will then be adjusted with any applicable bonuses earned through speed in solving the challenges.