PetitPrince wrote an essay on Tetris the Grand Master.

He writes:

There is a famous superplay video found throughout the web. Perhaps you’ve seen it before? Like many people, my initial reaction to this video was something along the lines of “WTF? O_O Wow, that’s fast! This Japanese guy is crazy.” and I left it at that. But behind this video there was a game of unimaginable depth: the Tetris the Grand Master series. “Come again? A deep Tetris game? What’s so special about that??” you might say. Patience, young grasshopper, for the real presentation is yet to begin.

Check the essay for a closer look at Tetris the Grand Master.