Antiwordle #1711
  11 guesses

⬛🟨🟨⬛⬛
⬛🟨🟨🟨⬛
⬛🟨🟨🟨⬛
⬛🟨🟨🟨⬛
🟨🟨🟨⬛⬛
🟨🟨🟨⬛⬛
🟨⬛⬛🟨🟨
⬛⬛🟨🟨🟨
🟨🟨🟨⬛🟨
🟨🟨🟨⬛🟨
🟥🟥🟥🟥🟥

Neat. Got a bit unlucky with the first two guesses, but you can still get quite far