# Board Grade

When participating in **Great Works**, you can place up to **20** [**Famous Buildings**](https://city-whitepaper.gitbook.io/reality-rush/advanced-gameplay/famous-buildings) on your **Great Work Board**. These buildings can come from different[ **tiers** and **grades**](https://city-whitepaper.gitbook.io/reality-rush/advanced-gameplay/famous-buildings/building-grades), with their total [**RP Points**](https://city-whitepaper.gitbook.io/reality-rush/getting-started/rp-points) contributing to the **board power**. The composition of the board is crucial, as it directly impacts your success rate and the overall costs of completing a Great Work.

#### Key Strategy

Using low-grade buildings to fill the board may seem appealing, but it comes with a hidden cost. Each building incurs an associated **cost per project**, and if your rewards do not outweigh these costs, you risk losing **$RRUSH tokens** over time. Always ensure that your **expected value** is higher than your **total cost**.

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#### Board Grade Calculation

The **Board Grade** is determined by the majority grade of the buildings placed on the board. Here's how it works:

<table data-header-hidden><thead><tr><th width="189"></th><th></th></tr></thead><tbody><tr><td><strong>Board Grade</strong></td><td><strong>Condition</strong></td></tr><tr><td><strong>Titan</strong></td><td>Majority of buildings on the board are <strong>Titan Famous Buildings</strong></td></tr><tr><td><strong>Artifact</strong></td><td>Majority of buildings on the board are <strong>Artifact Famous Buildings</strong></td></tr><tr><td><strong>Legendary</strong></td><td>Majority of buildings on the board are <strong>Legendary Famous Buildings</strong></td></tr><tr><td><strong>Epic</strong></td><td>Majority of buildings on the board are <strong>Epic Famous Buildings</strong></td></tr><tr><td><strong>Rare</strong></td><td>Majority of buildings on the board are <strong>Rare Famous Buildings</strong></td></tr><tr><td><strong>Uncommon</strong></td><td>Majority of buildings on the board are <strong>Uncommon Famous Buildings</strong></td></tr><tr><td><strong>Base</strong></td><td>Majority of buildings on the board are <strong>Base Famous Buildings</strong></td></tr></tbody></table>

**Tie Rule**

If the board has an **equal number of buildings** from different grades, the **lower grade** will define the **Board Grade**.

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#### Examples

1. **Example 1:**
   * **Board Composition:** 13 Famous Buildings
     * 2 Legendary
     * 4 Artifact
     * 5 Rare
     * 2 Epic
   * **Result:** Majority of buildings are **Rare**, so the board is classified as a **Rare Board**.
2. **Example 2:**
   * **Board Composition:** 5 Famous Buildings
     * 3 Artifact
     * 1 Titan
     * 1 Legendary
   * **Result:** Majority of buildings are **Artifact**, so the board is classified as an **Artifact Board**.
3. **Example 3:**
   * **Board Composition:** 20 Famous Buildings
     * 10 Rare
     * 10 Epic
   * **Result:** Since the number of Rare and Epic buildings is equal, the **lower grade** (Rare) defines the board. The board is classified as a **Rare Board**.

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#### Impact of Board Grade

The **higher the board grade**, the better the **probabilities of success** for completing higher levels of **Great Works**. Balancing the number and grade of buildings to optimize your **expected value** is essential for maximizing your rewards and minimizing costs.