Elimination Tapa Nurikabe-style: Shade some of the cells black. Black cells must be connected, but no 2×2 square may be all black. Cells containing numbers may not be shaded black. A cell with numbers represents the lengths of contiguous black cells in the cells adjacent to itself, separated by at least one white cell between different groups.

In addition, each square with numbers has one extra number. Removing extra numbers is part of the puzzle. Question marks indicate unknown numbers.

Expected difficulty Hard • Answer • Comment/E-mail if you want a solution to be published

From The Archives 001: Symmetric–
Elimination Tapa

Clearly intended to be a standalone post for this.

Yeah, reposting puzzles I’ve published somewhere else. This includes my old blog.

Also, yay, managed to disable anti-aliasing with a program!