Pentomino

Pentomino is the set of puzzle pieces made by joining five identical squares.

There are a total of 12 unique conformations of the shapes, excluding rotation and reflection.

It is a 2-player game, and is played on a 8x8 grid.
1. each player takes turn to lay down a piece, any piece, on the gird without overlapping any of the previously laid pieces.
2. The player who fails to lay a piece legally loses; or IOW, the last player who successfully put down a piece wins.

Further reading:
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