Plus two squares
Plus two squares (one-sided set)
Plus three squares
Plus three squares (one-sided set)
Plus two dominoes
Sets Formed by adding a Straight Tetromino
Trominoes plus I tetromino
One-sided set
Tetrominoes plus I tetromino - this set of 70 pieces is unbalanced on a chessboard colouring and so no rectangle can be made.