Shape Minesweeper

Rules

Place all of the given shapes into the grid. The shapes may be rotated and/or reflected. Shapes cannot cover the numbered cells. Shapes cannot touch each other (not even diagonally). Numbered cells indicate how many of the surrounding cells (including diagonally adjacent cells) will contain a shape part.

(Rules and example from PGP IB)

Rule variations

• "Polyominoes" from WPC 2017/Round 4 can be seen as a Shape Minesweeper puzzle without diagonal constraints (shapes can touch pointwise, numbers didn't count diagonally touching cell).

History of the puzzle

Probably the oldest of this type of variant is "Battleships varia #2" from WPC 1999/Part 9. That puzzle can be seen as Shape Minesweeper with a standard fleet of battleships as the given set of shapes. The author of that puzzle is currently unknown.

This very generalised name was first used in the 2015 Puzzle Grand Prix, 5th Round. The author of the puzzle was Thomas Snyder (USA).

Appearances in the past WPCs

• WPC 2017/Round 5 (Triangular) by Rohan Rao
• WPC 2016/Round 17 by Matej Uher
• WPC 2011/Part 15
• WPC 1999/Part 9