1. Launch the game "Best Classic Spider Solitaire" on your mobile device.

2. Choose the difficulty level, typically based on the number of suits: 1, 2, or 4.

3. The objective is to build eight complete sequences of cards in descending order from King down to Ace in the same suit.

4. Cards are dealt into ten columns at the start of the game. Some cards are face up and others are face down.

5. Tap and drag cards or sequences of cards to move them to another column. You can only move cards if they form a descending sequence and are of the same suit.

6. You can place any card or valid sequence onto an empty column.

7. Tap the deck in the lower corner to deal an additional row of cards to each column when no more moves are possible or desired.

8. You must complete a full sequence from King to Ace of the same suit to remove it from the board.

9. Continue revealing hidden cards and organizing sequences to clear all cards from the tableau.

10. Try to finish the game in as few moves and as quickly as possible to earn a higher score.