Stiletto

A dagger represents an option for a double move. Stiletto is a game from the family of Gomoku, where players try to make a five in-a-row. The main difference is that the second player (traditionally White) starts with a dagger. This allows to compensate for Black's strong initial advantage. When players use the dagger, they pass it to the adversary. Full rules and examples at the game's forum. Stiletto, from the Italian, is a small, slender dagger with a long, narrow blade designed primarily for thrusting.