From Liquipedia StarCraft Brood War Wiki
3 at 4, 8, 12
2011 - Current
- Backdoors - There are two backdoors to each main (one leading to each of the other mains, with a gas expansion in between), blocked off by two Xel'Naga Temples and a mineral patch.
- The middle expos were all shifted counter-clockwise, away from the ramps.
- Number of mineral patches in the main were reduced from 10 to 9.