Crafting a game system so compelling that other designers want to create their own games using it is a rare beast in board gaming. Veteran wargame designer Volko Ruhnke has managed it twice - first with the COIN series, which saw its asymmetric counterinsurgency design influence games including Root, and his Levy and Campaign series, which currently runs to nine volumes of designs by various creators. The former CIA intelligence analyst spoke to BoardGameWire about his continuing drive towards accessibility with new design Hunt for Blackbeard, which is on Kickstarter now, how he's solving the hidden movement mechanics conundrum, and which games have been influencing his own design processes in recent years.