これがずばぬけて一番だ。

this (indicating an item near the speaker, the action of the speaker, or the current topic); this person (usu. indicating someone in one's in-group); now; here; I (me); certainly

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to tower above the rest; to be by far the best; to be prominent; to be outstanding; to be a cut above

number one; first; first place; best; most; game; round; bout; as a test; as an experiment; by way of experiment; by way of trial; tentatively; song (e.g. in Noh); piece

be; is; indicates past or completed action; indicates light imperative