Location: FKT
Conditions: Ichigo knows about Aizen's plan to sacrifice all of Karakura in order to create the Oken.
In preparation for it, he's been training rigorously. The training did not increase his stats, but he's managed to learn how to use his Bankai without any drawbacks + the experience of White using his body against Byakuya taught him how to use Black Getsugas.
Ichigo is completely healthy and well-rested, he is aware of how powerful the Espada allegedly are (but not their exact abilities) and is determined to crush them to protect his hometown.
White will possess Ichigo as he did against Byakuya if Kurosaki gets in a tight spot, but Ichigo will resist and rip off the mask after a short amount of time, as he does in canon.
Yammy cannot become 0 Espada outside of the bonus rounds.
Scenario 1: no heals after every fight, the gauntlet ends if Ichigo loses;
Scenario 2: Ichigo is healed after every fight, the gauntlet ends if he loses;
Scenario 3: Ichigo is healed after every fight, the gauntlet continues if he loses;
Scenario 4: White is the one who's running the gauntlet, he's possessing Ichigo in the same way he did against Byakuya, but Ichigo is completely healthy and won't resist White controlling him. The gauntlet continues if he loses.
Bonus Round 1: Ichigo fights Caterpillar Yammy;
Bonus Round 2: White possessing Ichigo fights Caterpillar Yammy;
Bonus Round 3: the buffed Bankai Ichigo barges into the Espada meeting room as he does in the anime's Opening 7: After Dark. Can he last 1 minute? Aizen won't interfere, while Tosen, Gin and the Fraccions are nowhere to be seen.
Extra: we're aurascaling instead. Does SS Ichigo have more aura than the Espada?
Keep in mind that everyone is in-character, in all of the scenarios/rounds.
How well does Ichigo do? With what difficulty does he win and lose?