A similar argument has been used in the more-or-less famous proof of how to assemble a lamp with Tetris-shaped components into a rectangle: https://jackmorris.

A similar argument has been used in the more-or-less famous proof of how to assemble a lamp with Tetris-shaped components into a rectangle: https://jackmorris.xyz/2015/the-simple-proof-of-the-tetris-lamp/ https://jackmorris.xyz/2015/the-simple-proof-of-the-tetris-l...