Pentomino
The exact origin of the Pentomino puzzle genre is unknown. Although pentomino shapes have been studied in recreational mathematics for many decades, the emergence of Pentomino as a logical puzzle type is less clear. The earliest known appearance in puzzle competitions was at the World Puzzle Championship 1996, where Pentomino tasks were included. Some of the earliest published examples were created by Mikhail Khotiner, a Ukrainian puzzle composer, though it remains uncertain whether he invented the genre.
In standard Pentomino puzzles, solvers must place the twelve classical pentomino pieces into a grid under strict rules. The pieces may be rotated, and they must not touch each other, either orthogonally or diagonally. These constraints, combined with the irregular shapes of the pieces, create a demanding and highly logical spatial puzzle.
In standard Pentomino puzzles, solvers must place the twelve classical pentomino pieces into a grid under strict rules. The pieces may be rotated, and they must not touch each other, either orthogonally or diagonally. These constraints, combined with the irregular shapes of the pieces, create a demanding and highly logical spatial puzzle.
Rules
Place the given pentominoes into the grid. Pentominoes may be rotated and reflected. Elements can not touch each other, not even diagonally. Pentominoes cannot be placed in cells with cross. The numbers outside the grid indicate the number of cells occupied by pentominoes in that row or column.
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