Learning SC2

Every race in Starcraft 2 has its own unique methods of scouting and detecting cloaked units. This presents a challenge for new players, as there are multiple options available to you and the best one to use is often not so clear. Protoss has a few obvious and a few not so obvious ways of scouting. Much of these are simply personal preference but some are more effective in certain match ups than others. Detection, however, is a bit more strict in its use, specifically Photon Cannon placement. Below is what I have learned to be the effective ways to scout as Protoss as well as the best ways to use your detection options.

Scouting With Your 9 Supply Probe

Use that scout and count those drones.

The ‘standard’ time for Protoss to scout with their probe is at 9/10 supply. Typically, this probe warps in your first Pylon and then heads off to the opponents base. For ease of scouting I set this probe to a control group right at the start of the game (control group ‘0’ is my scouting control group). What this Probe is looking for is the key. First off he wants to eliminate the possibility of your opponent doing a ‘cheesy’ or all-in build. Signs of these types of early builds include:

• Vs. Zerg – Very few Drones and a Spawning pool indicates a ‘6 pool’ Zergling rush or similar.
• Vs. Terran – 2 Barracks and no Refinery indicates a possible ‘2 Rax’ Marine rush.
• Vs. Protoss – 2 Warpgates, no Cybernetics Core indicates a ‘2 Gate’ Zealot rush.
• Vs. Protoss – Empty Protoss base, or only a Pylon and Forge indicates a Cannon rush or Proxy gateways. Go scout in and around your base!

The second objective of that Probe is to identify what your opponent might be planning. There are many small things that you might see that can indicate what your opponent’s plans might be and there is an excellent list of these things on the Team Liquid forums here. Please check them out. While this scouting is important do not let it maintain all of your focus. There is nothing worse than knowing exactly what your opponent is doing but not being able to do anything about it because you have been to busy scouting too build anything.

Protoss Scouting Options

Scouting options for Protoss begin limited, just Probes, Zealots and then Stalkers, but as your tech level increases those options increase exponentially. I will simply list the options that I have heard of/discovered, if you know of any more please let everyone know in the comments section!

Hallucination

Hallucinate is available from the Cybernetics Core and you can begin research on it as soon as your Warpgate Tech is finished. Hallucinate allows you to use a Sentry to create a hallucinated unit of your choice. And your choice will almost certainly be to hallucinate a Phoenix to scout your opponents base. There are two nice things about this tech: firstly, if you are not planning on getting air units a few hallucinated air units can force your opponent to build unnecessary air defences. Secondly, you can use this to scout throughout the game without any further financial cost. Note: Do not attack with the Hallucinated units, they don’t do any damage and your opponent will know that it’s a fake!

Observers

Observers are almost a necessity later in the game, and can be a very effective way to scout before then. Often Protoss will settle for just getting one Observer to scout the opponents base/keep an eye out for cloaked units. Observers are cheap, quick to produce and are cloaked. So get lots of them, you can have one at your opponents front, one at each edge of their bases to watch for drops/air unit harass and one checking for your opponents expansions. With the vision provided by your observers and by having units on Xel Naga watchtowers you will be able to instantly shut down any harass or drops before they do any damage.

Phoenix

Dark Templar can do more than just kill workers.

Phoenix are quick to produce, are one of the fastest moving units in the game, have good harassment capabilities (especially against Zerg) and can provide excellent air superiority. With a few Phoenix it is possible to scout and harass your opponent at the same time. A drawback of using Phoenix for scouting is that their costs will weaken your ground army production by a decent amount. By using them to harass your opponent you can negate this somewhat.

Dark Templar

In a similar fashion to Phoenix, Dark Templar (DT) can harass and scout at the same time. Since they are cloaked, your DTs can just wander into an opponents base and scout before popping over to their mineral line for harassment. DTs usefulness for scouting your opponents base is limited if your opponent is prepared with detection. They can still be extremely useful for watching your opponents front and delaying enemy troop movements (as your opponent cannot move out without first getting mobile detection).

My Scouting Experiences

I have had personal success with using lots of observers, particularly against Terran. I find that I am able to shut down drops much better and can keep Terran contained much more effectively with the mobile vision provided by the Observer. Keeping Terran contained provides me with the extra confidence I need to dominate this matchup. PvT is currently my best matchup as Protoss, and I believe it is due to having excellent vision at all times. When I lose that vision is usually when I lose.

Against Protoss opponents I often use Dark Templar to scout, contain and harass and I have had decent success with this approach. I have found that it is necessary to also get Observers in PvP due to the increasing amount of players that seem to be using Warp Prism harass. I feel that PvP is currently my worst matchup and I need to work on maintaining good vision to overcome this hurdle. I may experiment with using Hallucination in this matchup.

I typically use DTs and Observers against Zerg, but I have had success with the Phoenix approach in the past. Zerg can, however, react very quickly to DTs if they are at Lair tech (if not DTs will be the end of them). As such I think I may lean more towards Phoenix in the PvZ matchup in the future.

Photon Cannons

Tucking a Cannon into the minerals like this will help those probes feel safe.

Its good practice to put at least 1 Photon Cannon in each of your mineral patches. This is mainly for the detection they provide but they also act as a deterrent for any light harassment. For as long as your army is fairly close to your bases this will be pretty much all you need. Once you expand more or start to move your army out it is always a good idea to put up extra cannon in the back of each base. This will effectively defend you from any harassment or counter attacks that may come.

I have had many, many games in the past where I have ended up trading bases with my opponent due to a counter attack drop in the back of my main base. I have also lost a lot of games due to cloaked Banshee harass. After I started putting up one Cannon in each of my mineral lines cloaked Banshees have not been a problem. However, I am still having trouble remembering to throw up those extra Cannon later in the game, and it has ended up costing me a few wins.

Do you have any other tips or strategies that you use to scout/detect with Protoss? If so, share them with me below!