Choosing Piece Sets Polyominoes includes 6 different piece sets to choose from. Statistics and high scores are only kept for the Pentominoes. Trominoes are all the polyominoes made of 3 squares. Tetrominoes are all the polyominoes made of 4 squares. Pentominoes are all the polyominoes made of 5 squares. Hexominoes are all the polyominoes made of 6 squares. 1-Sided Tetrominoes are all the polyominoes made of 4 squares, where mirror images are counted as separate pieces. In other words, a left hand and a right hand would be thought of as two different pieces, whereas normally they're thought of as the same. 1-Sided Pentominoes are all the polyominoes made of 5 squares, where mirror images are counted as separate pieces.   1-Sided and 2-Sided Pieces If 1-Sided Pieces is selected, then you cannot flip pieces -- you can only rotate them. Generally, you will want to select 1-Sided Pieces when using the 1-Sided Tetrominoes or 1-Sided Pentominoes. Though there is no rule that this has to be so. If 2-Sided Pieces is selected, then you can flip and rotate pieces.   Creating Your Own Piece Sets If the included piece sets aren't enough for you, you can create your own piece sets! See the help section on Creating Piece Sets.

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