Tetris with {O, S} Pieces: NP-Hardness Proof

Demonstration of the bottle structure for {O, S} for proving the NP-hardness of Tetris clearing with these two piece types in the paper "Tetris with Few Piece Types": https://arxiv.org/abs/2404.10712

Playthrough filmed using Jstris. Try for yourself at https://jstris.jezevec10.com/map/81818