On an infinite chessboard, a solitaire
game is played as follows: at the start, we have n² pieces occupying a square
of side n. The only allowed move is to jump over an occupied square to an
unoccupied one, and the piece which has been jumped over is removed. For
which n can the game end with only one piece remaining on the board?
@Zakaria-Yokiama le fr 😂