ZvP scouting (advanced discussion)

I'd like to share some timings I've learnt that have helped me identify cheeses. I'm a high masters player. I'd also like others to share their scouting tips in this matchup.

12gate finish time: 2:42-2:47 (2:47 max if they're sloppy)
13gate finish time: 2:53
14gate finish time: 3:00.

If you have a "late" drone scout you can deduce these timings by subtracting 0:50 from the cyber finish.

If the gate finishes significantly earlier than 2:42 you know he probably went 10 pylon 10 gate.

If Protoss is doing a 4 gate, commonly you will see 12 gate with 3 chronos. The warpgate research finishes at 5:25-5:35 on this brand of 4 gate (usually this is the 1 gas one).

If you're drone scouting, you want to leave his base at zealot + 0:40 (no chrono on gate) or + 0:30 (chrono on gate) [this includes a 2s safety window] by mineral walking so you don't die to the stalker or sentry. [this assumes he makes this ranged unit straight after the zealot. You can keep your eye on the gate to see this. This also assumes that the zealot spawns after the cyber finishes].
This is the reason that I don't block his cyber with just a drone going in circles. If I block his cyber, my drone will always die. However, of course I will block his cyber if I plan to then go to gas steal. Although, I think if you're getting there when his cyber isn't down, you're doing it too early. The only thing you gain from this is identifying 2 gate or proxy gate or forge by scouting this early (if you do drone scout) [you do have to identify forge this early if you're FE, I guess]. Gate timing, chronos, gas timing information all can be deduced from clicking on the geyser, subtracting 0:50 from cyber, etc. Remember that on a map like meta, if his probe gets to your base at 1:23, he's in close positions and he did a 9 scout.

You also want to see his gas timings. If he has an unusually late gate (after 3:00), he may or may not have gone gas first. There are some builds that delay the gate until the probe identifies whether you're hatch first, so it's not a sure thing. You can identify gas first by clicking on his first geyser at 4:00. If it has significantly less than 2355 at this time, he went gas first. (2355 is the amount 13 gate 15 gas has at 4:00). It mines at 116/min so you can use your common sense here if you scout it late. There are some protoss that really like gas first builds, such as minigun, yet most never use them. It still helps to be able to identify it. Off gas first builds, if he saves all his chronos and goes 3 gate blink stalker, the research is finished at 6:50 (4 stalkers are warped in just before this time). I've actually seen gate first squeeze research out at this same time, somehow. Perhaps he got an earlier 2nd gas in this replay. At this time, if you're on a short map and am going roaches in defense, you will want to use a creep tumour at your natural for obvious reasons (nestea said this). If he's going phoenixes, 4 of them are finished (saved chronos used purely on phoenixes) at 7:15. If he uses some chronos on nexus it can be 7:30+.

Of course with all this I'm assuming OL scouting is denied. Sometimes this occurs, these timings are therefore important to know.

Almost all 3 gate 2 gas expansions put the nexus down between 5:58-6:15. If it comes down at this time but he doesn't show enough sentries (he will very soon have 4-5 sentries on/after this time in a normal 3 gate build), he's hiding gas somewhere. This assumes you've scouted the standard 15/18 gas, and not the 15/21-22 gas 3 gate expansion or the 1 gas 3 gate expansion. Either he has sentries in his main, has bad macro, or is investing in DTs or stargate or something. DTs can't come before 7:15 in this build, so you can either get an overseer at this time or put down an evo at 6:05 (evo and spore take 65s to build) for a spore in each base. 1 spore in natural is risky, if he sneaks past your units you lose the game. Plus, you usually aren't sure if he's DTs or stargate, so the spore in both bases is fine if you choose this route. I've seen 5 pros face this information in the countless replays I've watched. Two unnamed pros got extra queens but didn't get detection, so they would've died to it. Idra, July and Nestea all reacted to this information properly (Idra stream, July/Nestea GSL), and at an optimal time. 1 base DTs come earlier for obvious reasons, but you should be able to sus this out because you've recorded the timings of both his gases and the second unit he makes. I'm talking specifically about the hidden DT build where 2 sentries are made after the zealot and an expansion is placed to mask the build.

As for distinguishing stargate or blink stalker from DTs, the difference lies in the chrono usage early game. Gas first with saved chronos, you should be more weary of blink stalker and stargate and not of DTs.

If you're hatch first, the earliest realistic time you can get 3 pylon walled in (your ramp) is ~2:30, but this requires total probe cutting (stop probes at 14). If they keep making probes, they can wall you off at 2:50 the earliest. Forge included. Many natural setups can wall not only your ramp but block the probe behind the minerals which guarantees the hatch death. Therefore if you're doing FE, it becomes crucial to see if he's forge before 2:50.

I may do one of these for ZvT.. but there's much less tells for terran...
12 rax finishes 2:40, 13 gas finishes 2:35... if rax is later but already gs he went gas first... if rax finishes 2:53 and has gas, he's doing the 11 gas 12 rax quick factory, probably for reactor hellions - bulidings switchover at 4:34 in this build.. gas first banshee earliest at 6:00... 12 rax 13 gas 1 star banshee earliest at 6:33 (out of port) with cloak at 7:25. first marine out at 3:05 off 12 rax...Every 0:25 add one marine.. This is one way to identify 2 rax off bottom ramp wall in if he shows his marines for whatever reason. Drone scout at 14 supply on meta (and i'm guessing shattered temple) otherwise ur drone dies in cross position..
I don't have much more for terran tbh.

Now, some of you may think memorizing this is too difficult, or its application is too difficult. Memorizing, maybe. But once you know them, the application is instantaneous and automatic - it requires no effort.