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OpenAI Five at Dota 2 – The International [video]

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Re: OpenAI Five at Dota 2 – The International [video]

#71
post #5

We are playing with regular couriers for the first time! And against a pro team.

Pain isn't the toughest of opponents at TI. Will they be playing vs a team that is currently still alive in the bracket? So far it seems Pain is kind of controlling the game at least much better vs the caster team (99th percentile)

When OpenAI played caster team, there was 5 invulnerable couriers that further increase their strength using death ball strategy.

Re: OpenAI Five at Dota 2 – The International [video]

#73
post #64

Earlier quoted context omitted.

That's what OpenAI claims, but there have been too many insta-hex/euls moments for me to believe that. Players are shift-queing blink+AoE spells and getting hexed in between the two abilities. That's way faster than a 200 ms reaction time. I think OpenAI might have a bug with how they're adding reaction time.

Someone did an analysis on this because it seemed like insta hex the last time they played, but they were all pre-queued and the 200ms turned out to be accurate.

Yeah my guess is that perfect timing-awareness and 200ms reaction time looks a lot like 0ms reaction time. Just start the action 200ms earlier - that'll work in enough cases that you'll look like you have perfect timing.

Re: OpenAI Five at Dota 2 – The International [video]

#74
post #61
post #28

Overall a very good game. Definitely smart on PAIN gaming's part to delay the game and wait until the mid game (where OpenAI traditionally excels the most) is over in order to rely on their stronger carry. I think the lack of 5 couriers really showed where OpenAI had a crutch the last game it played. Excited to see the improvements as this goes on, and I suspect that next year we'll see the OpenAI team beat the #1 ra…

Loved the strategy used by Pain. They recognised that fighting OpenAI wasn’t working so they actively avoided fights. They recognised strategic shortcomings, like the AI’s reluctance to pressure lanes and exploited it. What disappointed me a bit is that the AI didn’t make a concerted effort to win the game when it was strongest.

This type of playstyle adjustment by Pain is just standard Dota strategy tbh. When your team is losing teamfights, you avoid teamfights unless you know you have an imminent advantage (terrain, towers, initiation, numbers, etc.). A big part of avoiding teamfights is splitting up and putting pressure on lanes so that the other team has to split up to defend their towers. If they are split up and defending their towers, they can't group up and force fights at objectives (Roshan, towers, w/e) that your team would have to group up to defend.

Not to take anything away from Pain--just making it to TI is enough to prove that they're excellent Dota players.

Re: OpenAI Five at Dota 2 – The International [video]

#75

Earlier quoted context omitted.

Many believe that it’s an exponential curve so there’s a substantial difference between the first and twentieth place teams.

Looking historically at team ELO and how squads have gone on 27-series win streaks, this is probably right. Though I think the gap between "low-tier" TI teams and TI winners is getting much tighter. Group B at TI8 was so close the difference between upper-bracket and lower-bracket was 1 game for most of the teams.

*Elo, not ELO :)

Re: OpenAI Five at Dota 2 – The International [video]

#76
post #31

Earlier quoted context omitted.

These were the limitations for the previous OpenAI game: - Random Draft using a pool of 18 heroes (Crystal Maiden, Death Prophet, Earthshaker, Gyrocopter, Lich, Lion, Necrophos, Queen of Pain, Razor, Riki, Shadow Fiend, Slark, Sniper, Sven, Tidehunter, Viper, or Witch Doctor) - No summons/illusions - 5 invulnerable couriers, no exploiting them by scouting or tanking - No Scan Not sure if this match has the same limit…

They didn't have the invincible carriers and had more heros this time around.

> had more heros this time around

They had a fixed draft from the above pool with 1 new hero:

Crystal Maiden, Death Prophet, Tidehunter, Gyrocopter and Lich

vs

Lion, Necrophos, Sniper, Witch Doctor and Axe (the new one).

Re: OpenAI Five at Dota 2 – The International [video]

#77
post #7

Earlier quoted context omitted.

> his team isn't the strongest (they placed 17-18th during this TI) Oh, is that all :P. Assuming a 2x buffer for players who are good but not competitive, there are maybe 200 humans in the world who are better at DotA. If mastery is 1 in 10,000, these people are masters.

Many believe that it’s an exponential curve so there’s a substantial difference between the first and twentieth place teams.

Even if this is true, pain is one of the unpredictable teams that can take a game off anyone. They went 3-1 against Liquid at the Birmingham Major.

Actually, "weaker" (top 20) teams regularly do take games off better teams so I don't think there's much evidence for an exponential skill increase between teams.

Re: OpenAI Five at Dota 2 – The International [video]

#78
post #56

Earlier quoted context omitted.

I think it’s becoming clear that the network is overfitting to team fights (and other small duration action). OpenAI use of cooldowns in the last 20 minutes was inexcusable. It became obvious OpenAI had no working strategy.

Is OpenAI's expected win chance available anywhere? Only the bot reaction time against initiations was keeping them in the game for the last 20 minutes, so it might have been the desperate flailing typical of bots when they are losing.

The bots are actually calculating their expected win chance continuously throughout the match, even while the heroes are still being picked. During the OpenAI Five benchmark, the AI estimated its win chance at over 90 percent when it got to pick its own heroes, but estimated a mid 20% chance of victory when it was deliberately given bad heroes.

Re: OpenAI Five at Dota 2 – The International [video]

#79

Earlier quoted context omitted.

I don't believe this is the case, as OpenAI was able to hex (an immediate disable) Earthshaker before he got off Echoslam (a spell with no cast delay except the time to click the key).

Did he blink in? Is there a delay there?

There's no delay, but when people looked at the replay, Earth Shaker was actually visible when he thought he wasn't. The AI that disabled him had precast his spell on the out of range Earth Shaker, so when Earth Shaker blinked in to range, the precast spell went off in the following server tick.

Re: OpenAI Five at Dota 2 – The International [video]

#80
post #66
post #39

Outfought the humans in teamfights, other than that not sure how much long term strategic thought was shown.

It was frustrating to see it do so many things well but make strange decisions otherwise - poor warding. Some wards were simply wasted. (Wards are small, invisible, immovable units that grant vision) - using powerful long cool down spells to earn gold instead of keeping it in reserve for fights - not recognising that one of the lanes needed to be pushed out. Eventually this bit them in the ass. - using buybacks where…

The warding was interesting. It had 3 wards basically stacked on top of each other near the Roshan pit at one point. On the one hand, it apparently learned to ward areas that were of high strategic importance. On the other hand… it had 3 wards stacked on top of each other.
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