The 2021 The Schubert Theorem Shiraz was made with fruit from the Roennenfeldt Road vineyard, in Marananga, with 70% whole bunches in the ferment. The northeastern corner of this vineyard is matured in concrete egg to preserve the blue-fruited core that defines the style of this wine; it is the only cuvée that features an alternate maturation vessel. I knew (before and) when I tasted the 2019 and 2020 vintages what I was going to get, by and large. When I was in the Barossa in June 2021, I was already thinking about what the Schubert would look like from this year, as the perceived fit of season and style had the potential to dovetail in a most titillating fashion—a "stars aligning" kind of thing. A cool season overlays a warm site capable of producing dark, dense, sometimes brooding, always pure Shiraz. The combination of concrete egg (and, in this case, a slightly shorter maturation in this vessel) and cooler year has produced a wine of scintillating precision and fruit sweetness. It glows with its own black light. It shimmers and oscillates between fruit luminescence and plush tannic texture, and in doing so, it barely contains its own energy and abundance. The distinction between this profusion of fruit and the old "fruit bombs" of yore is the precision of acid and pliable fruit tannin that defines the middle palate and the ability of the fruit (courtesy of the winemaking) to shine through the vessels in which it matured. The tannin that shapes the wine is plentiful, make no mistake, yet it is ductile and fine and threads through every aspect of the palate. A thrilling Schubert this year, it's like a strike of lightning on a dark night. This wine appeals most fervently to my penchant for freshness, energy and resonant bass line. 14.9% alcohol.

99 points, Wine Advocate (May 2023)