This invention provides the portable (pocket size) board multi-game set for playing chess, checker or backgammon games. An improved portable board multi-game set includes the set of chess and checker/backgammon pieces each including the piece opening, inclosure and director, a game board comprising two foldable half-boards coupled to each other by the hinges, chess/checker field layer, a backgammon field layer, and the apertures located on the side of the board intended for chess/checker games and providing the prevention of the piece's misplacement off the center of the squares on the chess/checker game field by passage of the piece's director into aperture. The portable board game set also comprises a compartment for storage of the pieces.