Blacken some areas so that the numbers on the edge indicate how many cells in the corresponding row or column are black. Within an area either all cells must be black or none.
(Rules and example from WPC 2018 IB)
History of the puzzle
First appeared on Nikoli volume 53 (1995). Invented by Toshiharu Yamamoto (Japan). Original name タイルペイント is a transliteration of English words "tile" and "paint." In Nikoli's "Tile Paint," shaded cells revealed a hidden picture, similarly to Nonogramm.
The name Crazy Pavement was given in 2003 by Hans Eendebak when the puzzle was introduced to Breinbrekers magazine.  By then shaded cells no longer formed a picture.
Appearances in the past WPCs
- WPC 2018/Round 1 by Jiři Hrdina
- WPC 2017/Round 16 by Ashish Kumar
- WPC 2014/Round 3
- WPC 2013/Part 4
- WPC 2013/Part 8