DawgCTF 2025 - Magnus Opus

Published: April 22, 2025 | CTF: DawgCTF 2025
CTF OSINT Chess

Magnus Opus (OSINT)

Category OSINT (Open Source Intelligence)
Points Unknown
Difficulty Medium
Magnus Opus Challenge Description

This OSINT challenge involves identifying a famous chess game. The title "Magnus Opus" is a clever play on words, combining "Magnus" (likely referring to Magnus Carlsen, the current world chess champion) and "magnum opus" (a great work).

Analyzing the Chess Position

The challenge provides a screenshot of a chess position. To identify the game, I'll need to analyze this position and search for it in chess databases.

Chess Position

From the position, I can see:

Searching for the Game

Given the title's reference to Magnus, I first looked through some of Magnus Carlsen's most famous games. However, I also considered that the title might be misleading, and this could be another famous player's game.

I took several approaches:

  1. Searched for the position using online chess position recognition tools
  2. Looked through collections of famous chess games
  3. Searched for "immortal chess game" and similar terms, as the position looked like a sacrifice-heavy attack
Chess Database Search Results

After thorough research, I identified the position as coming from a famous game known as "Kasparov's Immortal" - a game played by Garry Kasparov against Veselin Topalov in 1999. This game is renowned for Kasparov's stunning queen sacrifice followed by a brilliant attack.

Kasparov's Immortal Game Analysis

The game is called "immortal" because it's considered one of the greatest chess games ever played, featuring spectacular sacrifices and attacking play. The term "immortal" in chess refers to games that are so brilliant they will be remembered forever.

FLAG: DawgCTF{Kasparov's_immortal}
Key Learning: This challenge demonstrates the importance of domain knowledge in OSINT investigations. Understanding chess terminology, famous games, and being able to identify patterns were key to solving this challenge. It also shows how titles and hints can sometimes misdirect (Magnus vs. Kasparov) but still provide useful context.