The Diamond Deck idea
A diagram introduces a situation. An explanation makes it understandable. A repeatable setup makes it practicable. The ecosystem connects these steps across cards, books, the app and projection.
The author’s perspective
Yuriy Setko is identified in the project materials as the developer of the 3.5–11–6 Unified Diamond System. The work reflects an effort to organize pool knowledge into a consistent language for learning and practice.
Practice remains the point
None of these tools replaces time at the table. They are intended to make that time more structured, visual and purposeful.