#16 - Tapa (Palindrome)

   A Tapa (Palindrome) puzzle. I created this puzzle on 13 June, 2021. It was my entry to a speedsetting session in the CTC Discord, taking 2nd place out of 13 entries.

Difficulty: 3/5

(Classic rules from GM Puzzles)
Shade some empty cells black to create a single connected wall. Numbers in a cell indicate the length of consecutive shaded blocks in the neighboring cells. If there is more than one number in a cell, then there must be at least one white (unshaded) cell between the black cell groups. Cells with numbers cannot be shaded, and the shaded cells cannot form a 2×2 square anywhere in the grid.

Additionally, there are palindrome lines drawn in the grid. The pattern of shaded and unshaded cells is the same when read from either end of the line.

Solve on penpa