On the TV show Lost What game did Locke use to illustrate the battle of good and evil on the island?

In the TV show Lost, john Locke used the game of backgammon to illustrate the battle of good and evil on the island. He explained that the two sides of the game represented the opposing forces, with the black pieces symbolizing darkness and the white pieces representing light. This metaphor underscores the central themes of conflict and duality present throughout the series.