The South Korean company, Samsung, stated Monday entrants in its “Smart App Challenge 2013” must make use of the Samsung Chord SDK (software development kit). Chord is a software interface for creating wireless connections directly between Samsung smartphones, without the use of an online server or mobile phone network.Samsung is marketing its peer-to-peer technology to end users as “Group Play,” a service for multiplayer games or sharing music and photos among users of its phones and tablets. The company is the world’s largest smartphone manufacturer but relies on Google’s Android ecosystem for the bulk of its online offerings and apps, most of which also run on rival phones. Read the full story here.