I’d like to start this out by posting some of the common chords i use for backing up celtic music in the Orkney Tuning. I created these using Fretty Charts. I’ll be getting the full version soon, so pardon the light demo version watermark on the fretboard.
Without a capo Orkney tuning is CGDGCD, low to high strings. The 6th, 5th, and 1st strings are dropped down a step, and the 2nd string is raised up a step. As long as you dont have anything heavier than medium gauge string on your guitar you should be fine raising that second string.
In Orkney i usually play backup with the Capo at the 2nd fret. The chord diagrams are laid out from that perspective. Treat the nut as if it were a capo at the 2nd fret in the pictures.
These some of the basic shapes i use when backing up irish music. Alot of them contain no thirds, which sounds nice, and alot of the chord forms are movable. Experiment and see what you come up with.
I’ll be posting some more chords and scales soon.