Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

Moving Hole (3D pieces)
2x2x4 Sliding BlockA sliding block puzzle with an unusual size.
Blind Varikon 2x2x2A puzzle with the mechanism of the Varikon 2x2x2 but the goal of Rubiks Dice.
BloxboxA puzzle equivalent to Varikon 2x2x2 but produced way before the cube craze.

Bloxbox (by Piet Hein)An earlier version of the Varikon 2x2x2, signed by the first inventor.
Challenge Cube FourThe little brother of Challenge Cube Nine from the same company. It depicts six different fruits.

Challenge Cube NineSliding block puzzle with playing card suits.
Clark's CubeA new twist to the sliding blocks theme.
Equal-7A sliding blocks 2x2x2 with four challenges

Inside Out 2x2x2 Start (aka Vadasz Kocka)The solid colour, 2x2x2 version of the Vadasz cube.
Inside Out 3x3x3 Standard (aka Vadasz Kocka)The solid colour, 3x3x3 version of the Vadasz cube.
Inside Out 4x4x4 Profi (aka Vadasz Kocka)The solid colour, 4x4x4 version of the Vadasz cube.

Inside Out 4x4x4 Rainbow (aka Vadasz Kocka)The rainbow coloured 4x4x4 version of the Vadasz cube.
InversionA sliding blocks puzzle with only edges and corners.
IQubeA well-designed 3D movable space puzzle.

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