Only picked up a guitar, a Gear4Music strat style electric (didn't want to spend too much until I felt I was making progress) six months ago. It was an ambition from way back to have a go and finally retirement gave me the opportunity. Anyway, I came across a tab the other day with something I don't understand and if anyone could enlighten me I'd be grateful. The A string on this tab is played open, the B string on the second fret, with nothing marked for D&G. The A & B notes are shown one directly above the other, which to my limited knowledge means they are played together, but how do I do that without hitting D&G as well?. Do I play A & B separately or hit all four, leaving D&G open?. Any advice would be welcome.