Strategy is a solitaire

Solitaire

Solitaire is any tabletop game which one can play by oneself or with other people. The solitaire card game Klondike is often known as simply Solitaire....

 card game

Card game

A card game is any game using playing cards as the primary device with which the game is played, be they traditional or game-specific. Countless card games exist, including families of related games...

 which uses a deck of 52 playing card

Playing card

A playing card is a piece of specially prepared heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic, marked with distinguishing motifs and used as one of a set for playing card games...

s. It belongs to the same family as Sir Tommy

Sir Tommy

Sir Tommy is a solitaire card game using a deck of 52 playing cards. It is said to be the earliest card building games and belongs to the same family of card building games as Calculation and Strategy. It is also known as Try Again, Old Patience and Numerica.Cards are dealt one at a time...

 and Calculation, and this can be regarded as the more difficult cousin of Sir Tommy.

The cards in the deck are dealt one at a time. Aces, whenever they appear, are placed onto the foundations and are built up by suit. Cards that cannot yet be built are placed on any one of eight wastepiles, the top cards of which are available for play. Once a card is placed on a wastepile, the next place it will go is to foundations; it cannot be moved to another wastepile.

The game finishes after all cards are dealt to the wastepiles and all appropriate cards are built. The game is won when all cards end up in the foundations.