The Luckiest No Rotation Game (BetaTetris NoRo)

More than 3 years ago, I created my first NES Tetris AI that played no rotation, well before BetaTetris was developed. Over these years, I've learned a lot from developing BetaTetris, so recently I decided to revisit the no rotation format and trained a new agent.
After completing the training, I ran 100,000 games on 50,000 randomly-generated TetrisGYM seeds (left well and right well for each seed). For all but two seeds, the maximum score was 80 lines, except for this one game that was a huge outlier, as well as another game with 90 lines.
Based on my estimation from the score distribution of other games, this agent can achieve 103+ lines in approximately only 1 in 5~6 million games (0.00002%). It is thus extremely lucky to found this seed even with 100,000 games. I ran an additional 300,000 games and did not find another game with more than 95 lines.
This is a no limits run, meaning the agent can react to the next box instantly, but it didn't know the seed and the piece sequence beforehand.
The agent achieves an average of 30.6 lines in this format (level 0 start, no limits), 6.2 lines higher than the previous noro agent. It achieves 30 lines in about 52% of the games, 35 in 30%, 40 in 15%, 45 in 6.7%, 50 in 2.6%, 55 in 1%, 60 in 0.33%, 65 in 0.1%, and 70 in 0.03~0.04% of the games. It also showed no statistically significant difference between the left and right well on level 0 with no rotation. At higher speeds (15, 19, 29 starts), right well performed slightly better (0.2 lines higher on average).
This no rotation agent can also play with / without adjustments, with / without tuck, and various starting levels (0, 9, 15, 19, 29). Gameplays in different formats are coming out soon!
The source code and the model are both available in this repository: github.com/adrien1018/betatet... (documentation not available yet)

[@adrien_1018]

Zoltan has provided an analysis for this game! You can find it here: kzbin.info/www/bejne/iJbch2mtpdaWicU

[@Phoenix-LBS]

Bet

[@OS_Erol]

They should make a game like this but where you can rotate the pieces, i think a lot of people would play it, it seems pretty underrated

[@darker4793]

That would be the worst decision in the history of video games, that would never work and even worse if they make it for portable consoles

[@OS_Erol]

@@darker4793 imagine if they added a level that was so fast you could barely tap fast enough to still play well, surely no one could ever beat that right?

[@zZeimos]

Imagine they had to add a faster speed for all the pros. That would be so sick.

[@raffimolero64]

​@@OS_Erol No way that would work. Knowing the software industry nowadays, they'd release a half-written beta build with a bunch of glitches that completely break the game and call it an "Early Access" and all the patches would have to be implemented through community modding. Hell, games are so badly optimized in this day and age that I wouldn't be surprised if basic *math* caused the game to crash.

[@jayxone]

Now imagine if they made it so that you get REWARDED for spinning, it would absolutely ruin the original spirit of the game

[@raineyoung3291]

this is a really weird but effective way of stacking for no rotation... never thought that stacking horizontally would get that far.

[@golden_rod]

zoltan taking notes

[@user-sc2xl5mk5f]

3:00 even got combos more than I've ever got in this version of the game

It does the PC setups I am very proud but stacks on left?! It effortlessly gets 100 lines like wtf dude?!?!?

[@adrien_1018]

It just happens that this game is right well (it can do both left or right well and I run both) - there is basically no difference between left and right on low levels and 100 lines is the power of having 1 in 5 million luck :)

[@ajaxmajor]

pretty good, but when I did no rotation I cleared 103 and a half lines

[@usernameunkn0wn-1]

Wdym half

[@Austin_Playz27]

its a joke 103 lines would be far beyond wr

[@joshk147]

A line is a line you can't say it's only a half

[@Andrux0821]

@@joshk147ok josh “k” 147

[@superburger1122]

​@@joshk147 well i actually can but yeah this guy cant

[@darrenlo9802]

Zoltan better try this seed

[@maxelkjaernersting]

Approximately ten times better than me ……

[@WriteWordsMakeMagic]

Insane!

[@docpi3141]

incredible

[@irrigamii]

This is insane wtf

[@triskai]

🔥

[@cmyk8964]

A triumph of AI

[@kruks]

I know Tetris well and I can't make heads or tails of the strategy without rotation. It's eery.

[@sonicclang]

Ok, starting at level 0, they're not that fast. How much did you speed this up?

[@adrien_1018]

It is because all the pieces are pushed down as much as possible (see the input display on the lower left). The video is not sped up.

[@iwersonsch5131]

How far can this agent get if it knows the next 4 pieces?

Probably 4-500 at least

[@worldprops333]

when is betatetris true rebirth

[@bobczech7774]

lol

[@adrien_1018]

4 months ago :)

[@worldprops333]

@@adrien_1018 why didnt you upload it then all there is on channel is normal rebirth not 17,600 line piece rng reset true rebirth

[@adrien_1018]

Oh I thought you meant original ROM then no since RNG/framecount reset requires RNG manipulation, it is only doable using TAS

[@worldprops333]

@@adrien_1018 ok

[@matthew99_]

GG

[@user-vw6lh4nh8p]

cheating! you clearly did rotate the block piece multiple times!

[@nguyencraft0195]

why in the last piece, row 2 isnt cleared?

[@tottiman3939]

well he topped out, maybe that's processed first

[@Zempro]

jfc adrien

[@aidanhennessey5586]

Fire

[@ryanamburgy2791]

DAMN

[@David30007]

You get thousands of views but only 551 subs.

[@codygrandell]

You should compare this to stack rabbit

[@codygrandell]

The ai

[@Isoundfiveyearsold]

Now do rebirth, no rotation Is this tas or not?

this is AI not TAS

[@Triscap_193]

Did bro use tas?

[@Austin_Playz27]

its an ai