3 ms·
#18 is impossible. This margin is too small to provide the proof.
by kangnkodos 5y ago
#18 is impossible. This margin is too small to provide the proof.
- blueplanet200 5y agospoiler for how to prove it: think of colors of chessboard (black/white alternating) and what colors a domino piece will always cover.
- SamBam 5y agoNice. I was confused by the L-shaped shading in the top-right corner of the diagram, though.
- eevilspock 5y agoblueplanet200's proof can fit in a sentence or two. So sounds like you came up with an entirely different strategy. I'm curious what it is (doesn't matter if it's not as elegant).