---
title: Change Difficulty (serverbound)
description: "Play 0x04, client → server."
---

`play` · `0x04` · **serverbound** (client → server)

Requests a new world difficulty from the difficulty screen in the options menu. The server applies it only if the sender is an operator and the difficulty is not locked, then broadcasts `ChangeDifficulty` (clientbound) to all players.

Sent by the client, read by the server. Listen for it with `client.on("ChangeDifficulty", (data) => …)` on the receiving side.

## Fields

| Field | Type | Notes |
|---|---|---|
| `newDifficulty` | VarInt | Enum: `0` peaceful, `1` easy, `2` normal, `3` hard. also `difficulty` |

## Send it

```ts
await client.sendPacket("ChangeDifficulty", {
  newDifficulty: /* VarInt */,
});
```

Field aliases listed under Notes are accepted as alternative keys when writing.

Source: [`src/Core/Versions/776/Packets/play/serverbound/ChangeDifficulty.ts`](https://github.com/GDLev/mc-protocol/blob/master/src/Core/Versions/776/Packets/play/serverbound/ChangeDifficulty.ts)