Violin (cast puzzle)

 

Vortex (cast puzzle)

 

Ring puzzel 2 (cast puzzle)

 

Quartet (cast puzzle)

 

Cast cake

 

Spiral (cast puzzle)

 

Equa (cast puzzle)

 

Cast G en G

 

Cast key 2 (cast puzzle)

 

Ring puzzel (cast puzzle)

 

U & U cast puzzel

 

Donuts

 

Dolce (cast puzzle)

 

Cast cylinder

 

Chain (cast puzzle)

 

Cast news (cast puzzle)

 

Cast Dial

 

Cast Hashtag

 

Schaak puzzels

 

Square (Cast puzzle)

 

Archimedes Star

 

Archimedes infinity

 

Archimedes Atom

 

Archimedes Sphere and cilinder

 

Archimedes Nuts and bolts