To learn Harry Gregson-Williams - (From The Chronicles of Narnia: The Lion, The Witch and The Wardrobe/Score) The Battle chords, your first step should be understanding these chords - A, Gb, D, Gb, D, B, Gbm, Gb, Eb and Dm in sequence. Begin your practice at a relaxed 62 BPM, then work your way up to the song's BPM of 125. Given the song's key of C Minor, adjust the capo to align with your vocal range and chord preference.