Pentominoes in White

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Rules[edit]

Pentominoes in White Example.png Pentominoes in White Example Solution.png

Place identical pentominoes into the grid. The pentominoes may be rotated and reflected, but they cannot touch each other, not even diagonally. Then blacken the unused cells. The numbers outside the grid indicate the lengths of blocks of blackened cells. If there are more numbers in one row/column, there must be at least one white cell (part of the pentomino) between two blocks of blackened cells. The numbers outside the grid are given in increasing order.

(Rules and example (2 Ws) from WPC 2016 IB)

Rule variations[edit]

  • As for all the other polyomino puzzles, some rulesets allow reflection, while others don't. The original from WPC 2012/Part 5 forbade reflections.

History of the puzzle[edit]

First appeared on WPC 2012/Part 5. Its author is currently unknown. Most likely influenced by Paint by Numbers or specifically its Japanese Pentominoes variant.

Appearances in the past WPCs[edit]