Piece
kyocera ringtones cheap adipex free samsung ringtones ativan online xenical online cheap propecia cheap wellbutrin celexa online hgh online didrex wellbutrin online alprazolam free ringtones hydrocodone online free midi ringtones free mp3 ringtones free cool ringtones free sony ringtones real ringtones cheap cialis cheap xenical nextel ringtones cool ringtones free sharp ringtones free nokia ringtones norco online lorazepam online mp3 ringtones ambien online sprint ringtones cheap levitra carisoprodol online fioricet cheap prozac diazepam online cheap clomid order zanaflex cheap hoodia free mono ringtones cheap xanax cheap phentermine free real ringtones polyphonic ringtones cheap zyban viagra online carisoprodol online cheap ultracet free kyocera ringtones cheap cyclobenzaprine vicodin online cheap meridia cheap nexium cheap ambien free funny ringtones norco online free mp3 ringtones flexeril cheap diazepam cheap cyclobenzaprine hgh online sagem ringtones buy wellbutrin fioricet online cheap hydrocodone carisoprodol online norco online free tracfone ringtones midi ringtones free sagem ringtones lortab free mono ringtones free mtv ringtones cheap xenical tracfone ringtones but clomid cheap soma cheap vigrx ativan online free ericsson ringtones nexium online cheap lorazepam cialis alltel ringtones free wwe ringtones levitra online tenuate online celexa online online pharmacy online cheap diethylpropion free ringtones buy alprazolam free motorola ringtones alltel ringtones paxil online zyban online cheap cyclobenzaprine propecia online free qwest ringtones funny ringtones free motorola ringtones cheap xanax free nextel ringtones cheap clonazepam meridia cingular ringtones buy alprazolam order flexeril cheap adipex cheap phentermine vigrx online sildenafil online verizon ringtones polyphonic ringtones jazz ringtones free tracfone ringtones buy pharmacy online free nextel ringtones valium online buy clonazepam order valium prozac online cialis online hoodia online cheap lisinopril cheap ativan tramadol free sony ericsson ringtones buy valium albuterol online free verizon ringtones free sharp ringtones free sonyericsson ringtones free samsung ringtones cheap vicodin viagra online free samsung ringtones order levitra but lipitor tramadol online nokia ringtones cheap albuterol mtv ringtones cheap phentermine free qwest ringtones real ringtones cheap meridia didrex online diethylpropion online free sprint ringtones cheap xanax free ringtones didrex online jazz ringtones ortho online online paxil cheap soma buy lorazepam free ericsson ringtones ultracet online qwest ringtones buy soma buy ultram buy rivotril fioricet online buy tenuate free nokia ringtones free sonyericsson ringtones free motorola ringtones sildenafil online viagra online free sony ericsson ringtones nexium online zoloft online funny ringtones buy ambien cheap hydrocodone ortho online free cingular ringtones lisinopril online cheap zanaflex ultram online cheap vicodin order ultracet free punk ringtones cheap clonazepam lortab online free wwe ringtones music ringtones order adipex free punk ringtones order lipitor buy diazepam cheap propecia free music ringtones online rivotril ultram online online zoloft cheap tramadol cheap paxil free sony ringtones A piece in Tetris and similar games is a geometric shape consisting of a set of blocks that is moved as a unit. A block is the part of a piece that fills one unit of the playfield. In some games, all blocks that make up a piece are colored the same; in others, especially falling piece games other than Tetris and its clones, they are colored differently.
Polyominoes
A polyomino is a piece made of two or more square blocks, where all blocks are connected through full coincident edges (as if squares on graph paper).
- A free polyomino is one that may be translated (moved about), rotated, or reflected.
- A one-sided polyomino is one that may be translated or rotated.
- A fixed polyomino can only be translated.
Polyominoes come in several sizes:
- 2 blocks make a domino: featured in Dr. Mario and Puyo Pop; seen in Tetris Blast.
- 3 blocks make a tromino (or trimino): featured in Columns (fixed I only) and Pac-Attack (L only); seen in Tetris Blast.
- 4 blocks make a tetromino (or tetramino or tetrimino): featured in Tetris and its clones. Lumines uses only O tetrominoes.
- 5 blocks make a pentomino: featured in Daedalian Opus; seen in Tetris 2 Bombliss.
Polyominoes are often named by a Latin letter that resembles the shape of the polyomino. For instance, an "I" has all its blocks in a straight line, and a "T" consists of an "I" tromino with one or more blocks in a straight line connected to one side of the center of the "I".
Hinged polyominoes
| |
| Hinged tetrominoes in Tetris 2 |
A hinged polyomino is similar to a polyomino but also allows connections at a point. In games that use hinged polyominoes, a piece may break apart at the diagonal connections when it lands, and the fragments may or may not be controllable afterward.
- 4 blocks: Hinged tetromino (featured in Tetris 2).