> For the complete documentation index, see [llms.txt](https://21-duel.gitbook.io/21-duel-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://21-duel.gitbook.io/21-duel-docs/21-duel.md). # 21 Duel ## Introduction ### The Problem with Modern Gaming In the current landscape of online games and Telegram bots, the player is almost always at a mathematical disadvantage. Whether it's slots, dice, or standard blackjack, you are playing against **"The House"**—an algorithm designed to ensure you eventually lose your money. The House edge is built into the code. The longer you play, the more you lose. ### The 21 Duel Solution **21 Duel** flips this model upside down. We are not a casino. We are a **Protocol**. 21 Duel is a **Player-vs-Player (PvP) Strategy Game** where the protocol acts as a neutral referee. We provide the security, the shuffling fairness, and the matchmaking. You provide the skill. When you sit at a table, you are not fighting a computer; you are fighting another human being on the other side of the screen. ### Core Vision Our mission is to build a decentralized economy where value flows to the **active players**, not the developers. #### 1. Fairness First Every game starts with a cryptographically secure coin toss to determine turn order. The deck shuffling is handled by server-side SystemRandom entropy, making it mathematically impossible to predict cards or rig hands. #### 2. Proof of Play (Mining) We introduced a mechanism called **"Proof of Play"**. You do not buy $21D tokens during a presale; you **mine** them by playing the game. Winning hands against AI or Humans "unlocks" tokens from the supply contract. #### 3. Hyper-Deflation We do not take a profit from your losses. Instead, we enforce a **2.5% Burn Protocol** on every PvP pot. * **Winner:** Takes 97.5% of the total pot. * **Protocol:** Takes 2.5% and **BURNS** it immediately. This reduces the total supply of $21D forever, ensuring that as the game grows, the tokens become scarcer and more valuable.