![Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_1.jpg)
Stack by Konstantin Achkov
Product designer Konstantin Achkov has created a range of flat-pack furniture that slots together like a puzzle.
![Stack by Konstantin Achkov Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_2.jpg)
Called Stack, the pieces are assembled without glue, screws or other fixings.
![Stack by Konstantin Achkov Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_3.jpg)
The collection so far includes a round table, bar stool, chair and armchair.
![Stack by Konstantin Achkov Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_4.jpg)
Each one is made of 18mm-thick beech plywood, cut with a computer-controlled router.
![Stack by Konstantin Achkov Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_8.jpg)
The pieces were presented at Sofia Design Week from 1 to 8 June.
![Stack by Konstantin Achkov Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_9.jpg)
A graduate of Sofia University, Achkov plans to launch his own brand called Tenon to produce this range and his previous work.
![Stack by Konstantin Achkov Stack by Konstantin Achkov](https://static.dezeen.com/uploads/2012/06/dezeen_Stack-by-Konstantin-Achkov_10.jpg)