Minor 2nds – Playing by Name on Guitar Down 1 2 In this lesson, we will play Minor 2nds on the guitar going down. The one special case is similar to what we learned before. If the interval crosses over the B and G string going down we do the opposite and subtract one fret. Please press the Exercise button below.May 7, 2013 1 2 In this lesson, we will play Minor 2nds on the guitar going down. The one special case is similar to what we learned before. If the interval crosses over the B and G string going down we do the opposite and subtract one fret. Please press the Exercise button below.