#30 - Heyawake - WTF

 Heyawake

 

 

Shade some cells in the grid according to the following rules:
- regions with a number should contain as many shaded cells;
- two black cells cannot be adjacent horizontally or vertically;
- a straight (horizontal or vertical) run of consecutive unshaded cells cannot span across more than 2 regions (it cannot cross more than one bold frontier);
- all unshaded cells should be connected in a single group.

 

Solve on Penpa: https://tinyurl.com/2glvkenh