If you enjoy that problem you might enjoy: Cut one corner off a chessboard. Is it possible to tile the remaining board with 3-by-1 dominoes? (Spoiler/solution

If you enjoy that problem you might enjoy: Cut one corner off a chessboard. Is it possible to tile the remaining board with 3-by-1 dominoes? (Spoiler/solution: https://www.jeremykun.com/2011/06/26/tiling-a-chessboard/ https://www.jeremykun.com/2011/06/26/tiling-a-chessboard/)