---
title: "Packet 66: RankUps"
description: "Describes one or more rank/score changes for end-of-match progression presentation."
canonical: "https://aosplay.net/protocol-168/packets/66"
markdown: "https://aosplay.net/docs/protocol-168/packets/66.md"
last_updated: "2026-07-16"
protocol: "Ace of Spades Battle Builder 168"
packet_id_decimal: "66"
packet_id_hex: "0x42"
direction: "Inactive"
family: "Progression"
implementation_status: "Planned"
evidence: "Provisional"
wire_size: "Variable: 5 + rank-up records"
---

# Packet 66: RankUps

> Describes one or more rank/score changes for end-of-match progression presentation.

- **Decimal ID:** 66
- **Hex ID:** 0x42
- **Direction:** Inactive
- **Family:** Progression
- **Status:** Planned
- **Evidence:** Provisional
- **Wire size:** Variable: 5 + rank-up records

## Exact wire layout

The application packet ID is the first byte. The remaining rows are in decode order. Byte sizes exclude ENet headers, wrapper prefixes, LZF chunk framing, and compression effects.

| # | Field | Encoding | Bytes | Purpose | Condition |
| ---: | --- | --- | ---: | --- | --- |
| 0 | `packet_id` | u8 | 1 | Always 66 (0x42). | — |
| 1 | `rank_up_count` | i32 LE | 4 | rank up count value. | — |
| 2 | `rank_ups[].score_reason` | i32 LE | 4 | rank ups[].score reason value. | — |
| 3 | `rank_ups[].old_score` | NUL-terminated UTF-8 string | N + 1 | Old score encoded as decimal text. | — |
| 4 | `rank_ups[].new_score` | NUL-terminated UTF-8 string | N + 1 | New score encoded as decimal text. | — |

## Encoding conventions

- `LE` means least-significant byte first.
- `fixed16` is two-byte sign-magnitude at 1/64 precision.
- `orientation16` uses the measured 1/8192 orientation mapping.
- NUL strings consume their encoded byte length plus one `00` terminator.
- Counted arrays repeat immediately in the documented order.

## Related resources

- [HTML packet page](https://aosplay.net/protocol-168/packets/66)
- [Complete packet catalog](https://aosplay.net/protocol-168/packets)
- [Packet catalog in Markdown](https://aosplay.net/docs/protocol-168/packets.md)
- [Protocol 168 guide](https://aosplay.net/protocol-168)