Perfect Tetromino Tiling: Player Manual
Objective
The goal of Perfect Tetromino Tiling is to completely fill the rectangular board using all 42 tetrominoes. There are 6 of each type available, and there does exist a combination of all 42 pieces that perfectly fills the board.
How to Play
Picking Up Tetrominoes
- Click on any tetromino in the stacks to pick it up.
- Drag it to the board while holding the mouse button or dragging with your finger on a touchscreen.
Placing Tetrominoes
- Release the mouse button or lift your finger to lock the tetromino into the nearest grid position on the board.
- Tetrominoes automatically snap to the grid for precise placement.
Moving Tetrominoes
You can move a tetromino again at any time by clicking or tapping it on the board, then dragging it to a new location.
Rotating Tetrominoes
Double click or double tap a tetromino while it is on the board to rotate it 90° clockwise.
Dropping Outside the Board
If you release a tetromino outside the board while dragging it, it will return to its original stack.
Stacks and Counters
- The stacks at the bottom of the screen show all 7 tetromino types.
- Each stack has a counter showing how many pieces of that type are remaining.
- Clicking or tapping a tetromino from a stack decreases its counter by one.
- Returning a tetromino to a stack increases its counter by one.
Timer
The timer starts automatically the first time you click or tap on any stack and shows the elapsed time in HH:MM:SS format.
Winning the Game
- You win when all tetrominoes are placed on the board, all counters are 0, and the board is completely filled with no empty squares.
- Once these conditions are met, the timer stops and you are notified of your success.