# The Bulgarian solitaire and the mathematics around it

• Published in 2015
In the collections
The Bulgarian solitaire is a mathematical card game played by one person. A pack of $n$ cards is divided into several decks (or "piles"). Each move consists of the removing of one card from each deck and collecting the removed cards to form a new deck. The game ends when the same position occurs twice. It has turned out that when $n=k(k+1)/2$ is a triangular number, the game reaches the same stable configuration with size of the piles $1,2,\ldots,k$. The purpose of the paper is to tell the (quite amusing) story of the game and to discuss mathematical problems related with the Bulgarian solitaire. The paper is dedicated to the memory of Borislav Bojanov (1944-2009), a great mathematician, person, and friend, and one of the main protagonists in the story of the Bulgarian solitaire.

## Other information

key
TheBulgariansolitaireandthemathematicsaroundit
type
article
2017-08-10
date_published
2015-07-11

### BibTeX entry

@article{TheBulgariansolitaireandthemathematicsaroundit,
key = {TheBulgariansolitaireandthemathematicsaroundit},
type = {article},
title = {The Bulgarian solitaire and the mathematics around it},
author = {Vesselin Drensky},
abstract = {The Bulgarian solitaire is a mathematical card game played by one person. A
pack of $n$ cards is divided into several decks (or "piles"). Each move consists
of the removing of one card from each deck and collecting the removed cards to
form a new deck. The game ends when the same position occurs twice. It has
turned out that when $n=k(k+1)/2$ is a triangular number, the game reaches the
same stable configuration with size of the piles $1,2,\ldots,k$. The purpose of the
paper is to tell the (quite amusing) story of the game and to discuss
mathematical problems related with the Bulgarian solitaire.

The paper is dedicated to the memory of Borislav Bojanov (1944-2009), a great
mathematician, person, and friend, and one of the main protagonists in the
story of the Bulgarian solitaire.},
comment = {},
}