> ## Documentation Index
> Fetch the complete documentation index at: https://docs.battlecode.cam/llms.txt
> Use this file to discover all available pages before exploring further.
# Core
> Your central building — if it's destroyed, you lose.
The core is each team's central building. **If your core is destroyed, you lose the game.** Each team starts with one core.
## Properties
| Property | Value |
| -------------- | --------------- |
| HP | 500 |
| Footprint | 3×3 |
| Vision radius² | 36 |
| Action radius² | 8 (from centre) |
## Spawning
The core can **spawn one builder bot per round** on any of the 9 tiles it occupies. Spawning costs one action cooldown.
Each team can have at most **50 living units total**, including the core. That means you can have at most **49 additional living units**. Use `c.get_unit_count()` together with `GameConstants.MAX_TEAM_UNITS` if you want the exact numbers. `c.can_spawn()` and any unit-producing `c.can_build_*()` method already account for the cap.
```python theme={"dark"}
# Spawn a builder on an empty core tile
pos = c.get_position() # centre of the 3x3 core
for dx in range(-1, 2):
for dy in range(-1, 2):
target = Position(pos.x + dx, pos.y + dy)
if c.can_spawn(target):
c.spawn_builder(target)
break
```
## Resource delivery
Resources must be transferred to the core via [conveyors](/spec/conveyors) to be added to your team's global resource pool, which is used for building.
Raw axionite delivered to the core is **destroyed**, so refine it first if you want to keep it.
## Conversion
The core can convert refined axionite from the global resource pool into
titanium with `c.convert(amount)`.
$$
1 \text{ Ax} \rightarrow 4 \text{ Ti}
$$
Converted axionite is removed from the Ax collected stat and added to the Ti
collected stat.