Not what I referred to here:  >>/54942/, but couple of quotes David Glantz's Soviet Military Operational Art: In Pursuit of Deep Battle. Pages 100 and 101.
Ultimately the Red Army successfully met this second great challenge and triumphed, but only after years of attrition, frustration, and an agonizing process of military reeducation conducted during wartime. Throughout the war a new generation of commanders emerged, new equipment was developed and fielded, and military theories matured
For the sake of analysis the Soviets subdivide their "Great Patriotic War" into three distinct periods, each characterized by broad unifying themes reflecting Soviet fortunes in war and the state of military art.* The first period of war (June 1941 - November 1942) found the Soviets on the strategic defense punctuated by several Soviet attempts to undertake offensive operations on several important directions. The second period (December 1942 - December 1943) was one of transition from defensive operations to a general Soviet offensive designed to wrest the strategic initiative from the Germans. The third period (1944-1945) was a period of general Soviet offensives culminating in the achievement of total victory.

I see some parallels with the recent war on Ukraine. Perhaps because these are fairly generic terms. But.
It does seem the Russians coming out on top, after they changed the whole process how they wage the war. They are reeducating themselves. And the three stages also stands from the period counting from 2022 April, after they lost the initiative as the contracts of their troops expired and they have to mobilize. Ukraine was on the offensive but during the second period in 2023 they wrestled back the initiative, and now they are on a continuous offensive. And the Kursk intermezzo did not disrupt this offensive.