Okay, I thought I'd be a nice bloke and take a look at this replay, and here's my advice;
You did a 4 gateway into 5 gateway robo build off of 1 base. I don't want to call it a 4gate because it was FAR from crisp, you need to learn the build order and timings. Let's focus on teaching one thing at a time, I want you to focus on your opener.
Your pylon is on a good time, that's fine. After your 10th probe, it's okay to build a probe even though you're supply blocked - it saves you from wasting the time between when your pylon finishes and you building the probe - about 1 second or so. Also, this way you can chronoboost your nexus as soon as your pylon finishes.
13 gateway, for now just stick to 12 gateway in PvP (it's simpler and better in most circumstances, offensively and defensively). I want you to focus on constantly producing probes as soon as your gateway is built, because you may have to stop probe production for a tiny bit to get your gateway up, then as soon as you build the probe on 12 chronoboost it so your second chronoboost is also on your nexus. You do this, but you do it a LOT later than it should be.
Constantly producing probes and only spending two chrono's on your nexus, you should be able to put down gas on 14, pylon and cyber on 16 (again, you may have to stop production for a second to get the cyber on 16, but faster warpgate in PvP is better for you). and a zealot on 18, warpgate tech as soon as it finishes and non-stop chronoboosts on that from now until its finished. Stalker on 22, cut probes now (don't bother with second gas) and throw down your extra 3 gateways before you throw down your 3rd pylon. Then build a sentry to defend on 24, or a stalker if you're going to be offensive on 24. Move out and have forward pylons to warp in units, run up his ramp and kill him with constant warp ins.
Things to remember: if you cut at the right time, you should have exactly 3 probes in gas and 16 on minerals, which is optimal as you don't need any more for your build. 8/10 of my PvP games I don't build more than 6 probes for gas and 16 for minerals, plus 1-2 for placing forward pylons so around 24 all up. Staying on 1 base is a good idea rather than attempting to expand in PvP.
I know this sounds like a lot of things to remember, but if you think about it and practice it it will become second nature for you.
Checklist 9 Supply - Pylon
Chronoboost Nexus as soon as Pylon finishes 12 Supply - Cut probes to get Gateway as soon as you get 150 minerals
Chronoboost your Nexus as soon as you build your next probe 14 Supply - Assimilator 16 Supply - Build your pylon and stop probe production to get your cyber core as soon as your gateway finishes
Resume probe production although don't chrono your Nexus this time, save it. 18 Supply - Build Zealot
Warpgate as soon as cyber core finishes - still producing probes and Chrono the shit out of it, non-stop until its finished 22 Supply - Build Stalker and stop probe production so you're on 24/26 supply. 24 Supply - When you can, throw down your 3 gateways (Try around when warpgate is 1/3 to 1/2 of the way done). Then build a pylon and a Sentry/Stalker.
Forward pylons, constant chronos on your warpgate and your 4gate should hit at a time when he's not ready for it, if he forcefields his ramp just go back, warp in another round and try go up again. If you see him 4gating I wouldn't recommend risking getting your army cut off by a forcefield.
Oh, and you built too many sentries, only need 1 maybe 2 max. ^_^ Don't need to focus on anything past this, you either kill him with this build, or sit at the bottom of his ramp while you tech to blink stalkers/immortals/colossus with constant warp ins. Focus on your opener though before you fix anything else. Your probe production and chronoboost timings are small yet vital things to optimising your play and getting a massive lead against your opponent.
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