Daily 9x9 Nurikabe for 2021-12-11

Nurikabe is a binary determination puzzle. You must decide for each cell if it is white or black (by clicking on them) according to the following rules:

• All of the black cells must be connected.
• Each numbered cell must be part of a white island of connected white cells.
• Each island must have the same number of white cells as the number it contains (including the numbered cell).
• Two islands may not be connected.
• There cannot be any 2x2 blocks of black cells.

Read more about the history and methods behind nurikabe in the Wikipedia nurikabe article.