Melting as a Tool for Strategy. In rummy, melting is a strategic tool. You can learn more about your opponents' hands and modify your approach by watching what they are melding. An oslots casino onlinepponent may be about to go out if they lay down a run of hearts, for example, which could lead you to play more defensively by discarding cards that could aid them in finishing their melds. manipulating the dynamics of the game. Also, by keeping some cards until the ideal time to reveal them, melding can give you the chance to control the dynamics of the game.