First off the tl;dr for those in a hurry.
My SPS source code has been available since July 2022. It's not the only implementation.
So the short explanation is that the design of pickTetriminoSeed, the function that is the basis for the whole of TetrisGYM SPS (v4 and v5 seeds) has a weakness that Tetris original rom does not. The attached seeds are a list of seeds that fall into the same sequence before piece 100. This is caused by @invalidIndex. There are 276 seeds. Because of how the LFSR in generateNextPseudorandomNumber works, it's not just 276 seeds that do that, it's ~2x that. This is true of just about everything I've checked so instead of 4 million unique seeds, we have about 20k-80k sequences that a player can expect to get (research not complete). And because of how it locks, it continues indefinitely. This is probably beyond the capacity of a person to memorize, but we could see players memorize a small fraction of favorable and unfavorable sequences for a benefit in competition. Let's start the work of writing an improved SPS shall we?
Hoy discutimos un mecanismo muy interesante.
The audio is created with Google Text-to-Speech in Android for free using the spanish (Spain) voice. The script was written by various authors around the world and given to Wikipedia, where I got it on June 30, 2024.
Toma fotos!
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This is the twentieth podcast. Hoy discutimos un animal muy interesante.
The audio is created with Google Text-to-Speech in Android for free using the spanish (Spain) voice. The script was written by various authors around the world and given to Wikipedia, where I got it on June 12, 2024.
I want to thank the listeners for spending time learning. Keep up the good work. I'll try to keep creating good content for you on a reasonable schedule. Creating this blog is helping me learn as we build a podcast.
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