Canal View
Rules[edit]
Shade some empty cells to create a single connected group. Cells with numbers cannot be shaded, and the shaded cells cannot form a 2×2 square anywhere in the grid. Each numbered cell indicates the total number of shaded cells connected vertically and horizontally to that numbered cell, in a straight line till the next numbered/unoccupied cell, or the edge of the grid.
(Rules and example from WPC 2017 IB)
History of the puzzle[edit]
Invented by Prasanna Seshadri (India). The first puzzle appeared on 2014 US Nationals under the name "Tapa View", but later renamed.[1]
Appearances in the past WPCs[edit]
- WPC 2017/Round 2 by Prasanna Seshadri
- WPC 2017/Round 7 by Prasanna Seshadri