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Place the twelve pentominoes into the grid so that they do not touch each other, not even diagonally. Numbers below and to the right indicate the number of cells used by the pentominoes in the respective row and column. Pentominoes may be rotated and reflected. Cells marked with an × cannot be occupied with a pentomino.

(Rules and example (using 5 tetrominoes) from PGP IB)

Rule variations[edit]

  • Place some of the given pentominoes rather than all 12 pentominoes.
  • Place 5 / 7 tetrominoes (with or without reflection).
  • Some cells belonging to a certain pentomino are marked with corresponding letters.

History of the puzzle[edit]

First seen on the WPC in 1996. Who invented it is unknown.


Masyu Pentominoes[edit]

See List of Masyu variants#Masyu Pentominoes

Galaxies and Pentominoes[edit]

See Spiral Galaxies#Galaxies and Pentominoes

Appearances in the past WPCs[edit]