# Introduction

## Introduction

HPB Pool is a protocol for no-loss prize games on the HPB blockchain. The protocol:

**Enables developers to build their own no-loss prize games**

Prize games are pools of funds whose accrued interest is distributed as prizes. The concept is well-established and otherwise known as "[no loss lotteries](https://en.wikipedia.org/wiki/Prize-linked_savings_account)" or "[prize savings accounts](https://en.wikipedia.org/wiki/Prize-linked_savings_account)". All prize games created by the protocol share the same key characteristics:

* No loss of deposited funds
* Ability to withdraw at any time
* Fair prize distribution according to a prize strategy

Prize games can be differentiated in the following ways:

* The prize strategy used to determine frequency and distribution of prizes 
* The additional rewards offered by the prize pool
* The asset type the prize pool accepts for deposits 
* The fairness parameters