|No. 0|| Irregular, contains two equal pieces
The only puzzle with round pieces!
|No. 5|| Pentomino (all 12 possible pieces out of 5 squares)
in a rectangle of 6 x 10 squares.
|No. 6|| Hexiamond (all 12 possible pieces out of 6 triangles)
in an onion-shape puzzle surface.
|No. 8|| Pentomino (all 12 possible pieces out of 5 squares)
in a 8 x 8 square surface with a hole in the centre.
|No. 22|| Pentahex (all 22 possible pieces out of 5 hexagons)
In two colours in a rhomb shape surface.
|No. 24|| Septiamond (all 24 possible pieces out of 7 triangles)
in a hexa-star shape surface. This is by far the hardest puzzle!
|No. 600|| Hexomino (all 35 pieces out of 6 squares)
in a nearly rectangular surface.
|No. 783|| Double Tetromino (All 5 pieces out of 4 squares occur twice)
If you have played computer game Tetris you are in advantage!