In most modern protoss builds, protoss players want exactly 200 gas around 3:50-4:00 in order to make a stalker, a MsC, and warp gate all at the same time when the core finishes. There are several ways to get there, let's explore:
1) gas before gate:
+ Show Spoiler +
-9 pylon
-12 gas
-13 gate
**Chronoboost x3 on nexus**
-16 pylon
-18 core
-21 pylon
~200 gas mined @4:00
Although quite rare, this is a fun way to metagame someone who isn't paying attention with their scouting probe. The key here is that you appear to only have 1 geyser and look like you're gearing up for 4-gate/fast 1-gate expand, but in actuality, you're just doing a normal build. In some ways, this build is nice against cheese because if you spot it early on you can save chronoboosts. All in all, a fun way to change things up a little in your gameplay.
-12 gas
-13 gate
**Chronoboost x3 on nexus**
-16 pylon
-18 core
-21 pylon
~200 gas mined @4:00
Although quite rare, this is a fun way to metagame someone who isn't paying attention with their scouting probe. The key here is that you appear to only have 1 geyser and look like you're gearing up for 4-gate/fast 1-gate expand, but in actuality, you're just doing a normal build. In some ways, this build is nice against cheese because if you spot it early on you can save chronoboosts. All in all, a fun way to change things up a little in your gameplay.
2) delayed second geyser:
+ Show Spoiler +
-9 pylon
**Chonoboost x3 on nexus**
-13 gate
-14 gas
-16/17 pylon
-18 core
-19 gas
-25 pylon
~200 gas mined @4:00
Perhaps the second most common after 15 double gas, this build is very flexible and allows you to make changes on the fly if you scout cheese. You can save a chronoboost and the money you were going to spend on your second gas on an early zealot instead and be safe against things like proxy rax, proxy 2-gate, etc.
**Chonoboost x3 on nexus**
-13 gate
-14 gas
-16/17 pylon
-18 core
-19 gas
-25 pylon
~200 gas mined @4:00
Perhaps the second most common after 15 double gas, this build is very flexible and allows you to make changes on the fly if you scout cheese. You can save a chronoboost and the money you were going to spend on your second gas on an early zealot instead and be safe against things like proxy rax, proxy 2-gate, etc.
3) 16 double gas:
+ Show Spoiler +
-9 pylon
**Chronoboost x3 on nexus**
-13 gate
-16 double gas
**3 on each gas**
-17 pylon
-18 core
-25 pylon
~200 gas mined @4:00
This build is almost the same as 15 double gas except that you just delay the geysers by a little bit to consolidate your mineral income then catch up in gas by putting 3 in each geyser. Again, because you delay gases, you can respond to cheese a little bit better.
**Chronoboost x3 on nexus**
-13 gate
-16 double gas
**3 on each gas**
-17 pylon
-18 core
-25 pylon
~200 gas mined @4:00
This build is almost the same as 15 double gas except that you just delay the geysers by a little bit to consolidate your mineral income then catch up in gas by putting 3 in each geyser. Again, because you delay gases, you can respond to cheese a little bit better.
4) 15 double gas:
+ Show Spoiler +
-9 pylon
**Chronoboost x3 on nexus**
-13 gate
-15 double gas
**2 on each gas**
-17 pylon
-18 core
**Add 3 on each gas**
-25 pylon
~200 gas mined @4:00
Probably the most standard opening for protoss is 15 double gas. This build is really versatile and transitions well into anything. If you decide to go for an early expand, you can leave 2 in the geysers and get a later stalker. If you want to tech up quickly, you can add in a 3rd probe at each geyser to get the gas income you need. It's just very mutable and very flexible.
**Chronoboost x3 on nexus**
-13 gate
-15 double gas
**2 on each gas**
-17 pylon
-18 core
**Add 3 on each gas**
-25 pylon
~200 gas mined @4:00
Probably the most standard opening for protoss is 15 double gas. This build is really versatile and transitions well into anything. If you decide to go for an early expand, you can leave 2 in the geysers and get a later stalker. If you want to tech up quickly, you can add in a 3rd probe at each geyser to get the gas income you need. It's just very mutable and very flexible.