Quite simply, both of you went the same build, but he executed it better. Not trying to be mean, but give constructive criticism. Have you watched the replay yourself?
1. Keep up probe production! You stopped at 19 probes...that's not even enough for 2 at each patch and 3 in each geyser. Your opponent literally had double your probes, even if he stopped making them too, his economy was double yours (not to mention an expansion). Always keep making them!
This is especially true in the early game. You missed a probe when you were scouting, which is a harder thing to work on. At that point in the game he has nothing to kill your scout off with, so don't worry so much about him, and hit 5Q (assuming you put your nexus on 5 and use grid ).
2. Macro! When you attacked your opponent was 30 food higher than you. You're going to need some amazing positioning and micro to come out ahead in that battle. Work on keeping your money low by constant probe and unit production.
3. Extended Thermal Lance! He had it, you didn't. End of story.
Okay, maybe not quite the end . You knew you were researching it, I saw you chrono boost it once or twice. So why did you attack before it was finished? Honestly PvP comes down to whoever has the most colossus...or whoever doesn't have range yet.
4. Build Order. I don't play protoss, so I can't comment much here, but you did seem to have a definite plan in mind. It seemed like the other guys one got everything out faster though? Perhaps a protoss could comment on this bit.
Things I liked:
1. Your early game chrono boosting! Ignoring the fact you sometimes forgot to make a probe right away, for the first few minutes there was never excess energy on your nexus, and you kept chrono boosting out those probes. (yes I know 4gate builds save chrono for warpgate, but you clearly didn't need to do that).
2. You brought your scout home! You hung around and got some intel, then buggered off home and went straight back to mining when it wasn't safe anymore. Every worker is important, congratulations for not giving your opponent that little edge over you.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.