it was discovered that if you stay out of vision and cast raze, the other player does not get stick charges. that was the 1v1 shadow fiend bot a year ago though.
If that's the case, that's incredibly misleading. Especially because that's not undiscovered by human players, just by the OpenAI team, if that's what it is: https://blog.openai.com/more-on-dota-2/
"Sumail pointed out that the bot had learned to cast razes out of the enemy’s vision. This was due to a mechanic we hadn’t known about: abilities cast outside of the enemy’s vision prevent the enemy from gaining a wand charge."
That mechanic was in the patch notes for dota 6.69 released in 2010. Maybe its importance to high level 1v1 shadow fiend was revealed but that's stretching it. It is cool that the bot rediscovered it though.
Doubt that's what they are talking about if the mechanic was undiscovered before this year. Stick + vision mechanics have been well known for a while, I learned about it when I read about the Kunkka mid matchup. Might have been Pajkatt buying mangoes and using them out of vision last year? Not sure, my memory of the details is fuzzy.
"Sumail pointed out that the bot had learned to cast razes out of the enemy’s vision. This was due to a mechanic we hadn’t known about: abilities cast outside of the enemy’s vision prevent the enemy from gaining a wand charge."
That's not an undiscovered mechanic in the world of Dota - that's been known for a while and at least documented since 2015 https://dota2.gamepedia.com/index.php?title=Magic_Stick&oldi....
I wouldn't be surprised if it was known before then, I certainly remember this from a while back.
Again, if that's not what it was, then I take back what I said, but if it was, I do think that statement is misleading as written.