A method of operating an internal combustion engine, the internal combustion engine and control unit for an internal combustion engine

The invention relates to a method for operating an internal combustion engine (1) comprising the steps of: introducing a gaseous fuel into a combustion chamber (3) of the internal combustion engine (1) during a Saugtakts, or during a compression stroke and / or during an expansion stroke; first light-off at least a portion of the gaseous fuel; Expanding the at least partially inflamed gaseous fuel, and second ignition of the expanded gaseous fuel.