# Solitaire card games/Ninety-One

The game is won when the top cards of the thirteen piles have a total value of 91. The easiest combination to obtain is a sequence of thirteen cards from ace to king (${\displaystyle 91=1+2+3+4+5+6+7+8+9+10+11+12+13}$). But there are many other combinations that add up to 91, such as four kings, four aces, three fives, and two tens for instance (${\displaystyle 91=13*4+1*4+3*5+10*2=52+4+15+20}$). It is up to the player how to figure out those combinations.