Marble Solitaire is a single-player board game that involves moving marbles on a wooden or plastic board. The game typically features a cross-shaped layout with holes for marbles, where one hole is left empty at the start. The objective is to remove marbles by jumping over them into the empty space, similar to checkers. Players continue jumping marbles until no more moves are possible. The goal is to end up with a single marble remaining on the board, ideally in the center position. Marble Solitaire can be played in various styles, with different board shapes and rules, but the core concept remains the same.