Shade some empty cells black to form a set of dominoes (1×2 rectangles) that divides the grid into white regions; the dominoes cannot overlap or share an edge. Each region must contain exactly one type of given letter, and must also contain all instances of that letter (i.e. there cannot be two regions that contain C).
Example puzzle:
And the actual puzzle:
Solution code: Enter the lenght of consecutive WHITE cells for the following Rows/Columns: Row 1, Row 9, Column 7, Column 10
on 19. June 2022, 16:54 by Drawoon
penpa+: https://tinyurl.com/2djjqv3f
on 21. June 2017, 07:50 by Richard
Very interesting type with nice conclusions/deductions. Thx!