Place letters into some cells in the grid. Same letters cannot share a side, and blank cells cannot share a side. Each outlined region must be filled in alphabetical order, starting with ‘A’, from left to right and top to bottom. Each outlined region contains at least one blank cell. Cells with the letters form a single connected area.
(Rules and example from WPC 2017 IB)
History of the puzzle
Invented by Nikola Živanović (Serbia) in 2017 as a submission for Puzzle Innovations Contest, a pre-event of WPC 2017.
Appearances in the past WPCs
- WPC 2017/Round 18 by Deb Mohanty and Ashish Kumar