Puzzle Pen IIA strange puzzle from the cube craze which resembles a mixture between the ten billion barrel and Atomic Chaos.
RanzhirAn implementation of Tower of Hanoi with eight pieces.
RomashkaAnother variant of the soviet flower puzzles.
Rota CubesThree cubes in a tetrahedral case. With every move they not only change position but also orientation.
Rusty TowerA remake of the Babylon tower but with bandaged grooves.
Saturn (Belgian)32 disc-like pieces that have to be grouped in six groups of four pieces on two rings.
Shar VolshebnyiLooks like a puzzle with utilizes marbles and one hole to move them but in fact it is dexterity puzzle.
SiskinsSliding Tile/Moving Hole Puzzle - similar to the varikon 2x2 cube.
Slide-1A Square-1 with four holes on the top and bottom layer and with additional holes on the sides.
Slideception3D-printed recursion: A moving hole puzzle made up out of moving hole puzzle.
SmartphoneA little sliding piece puzzle (5 pieces) and 32 challenges.