It seems you're asking about the "Diablo" tactic from Championship Manager 03/04 (CM 03/04), specifically looking for team instructions and how to apply that tactic in a 2021 context (likely meaning a modern replay, a modded database, or a retro tactic discussion from that year).
The tactic relies on a bug where the AI's marking system fails to track a central midfielder making direct runs into the box. While the strikers occupy the defenders, the MC remains unmarked and arrives late to score an absurd number of goals. Formation: 4-1-3-2 Defense: Flat Back 4. cm 03 04 diablo tactic team instructions 2021
If you want, I can also provide a download link to the .tac tactic file (for CM 03/04) or a screenshot of the tactic screen as it looks in-game. Just let me know. It seems you're asking about the "Diablo" tactic
To achieve the classic "Diablo" effect, the following team settings are typically used: Mentality: Gung-Ho (the most aggressive attacking setting). Passing: Short. Tackling: Hard. Pressing: Always (Close down always). Offside Trap: Yes. Counter Attack: Yes. Marking: Zonal. Focus Play: Down Both Flanks. Key Player Roles & Instructions Pressing: Start with medium press for first 15
The original team instructions were designed for maximum aggression: Mentality: Gung-ho (maximum attacking intensity). Short and rapid to exploit spaces. Defensive Style: