If you're Zerg and your enemy is Protoss, then you'll pretty much have a hard time. Just fight your best and pray...

- Broodlings cast by queens won't work on many units. However, they'll work on Zealots which aren't robotic.

- Watch out for PSI storm which works on all living things. Your buildings are living so they can PSI storm them.

- You might be disappointed by how plague works against the Protoss. It won't hurt their shields so it's useless if you plan on plaguing some units and "tap" them with your troops to finish them off.

Remember that 4 Zerglings will kill a Zealot with 1 or 2 zerglings surviving. However, it'll be much harder to kill 10 Zealots with 40 Zerglings unless their Zealots are spread out and you have good control with your Zerglings. Make sure 4 are hitting one Zealot and there is only 4 Zerglings to one Zealots. Don't let a second Zealot bother your individual group of 4 that's attacking one Zealot.