Spider rules and strategy
The solitaire game played with two decks: ten columns, face-down cards to reveal and eight runs to build from king to ace. This site explains the exact rules, strategy and a winning game verified card by card. To play: Spider Solitaire, on iPhone, iPad and Android.
Available on the App Store and on Google Play.

Spider at a glance
Spider is played alone with 2 decks, or 104 cards. 54 cards form 10 columns of 5 or 6 cards: only the last card in each column is face up. The other 50 cards remain face down in the stock, which is used 5 times to place a new card on each column.
Place a card on a card one rank higher, regardless of suit: a 7 on a 8. The aim is to build a complete run of the same suit from king to ace in a column: it is then removed from play. The game is won when all 8 runs have been removed. The rules explain each move in detail, and the strategy explains how to proceed.
A deal from the app
Here is the deal with code SP1-S1C-AAAAAAD as dealt by the app, with 1 suit. Paste this code into the New Game window to play it; a game won in 117 moves is described in detail on the Examples page.
Stock: 50 cards, 5 deals remaining; no sequences removed. Column 1: 5 face down, then 2 of spades; column 2: 5 face down, then 10 of spades; column 3: 5 face down, then 9 of spades; column 4: 5 face down, then jack of spades; column 5: 4 face down, then 7 of spades; column 6: 4 face down, then 9 of spades; column 7: 4 face down, then 5 of spades; column 8: 4 face down, then king of spades; column 9: 4 face down, then 10 of spades; column 10: 4 face down, then ace of spades.
Where to start?
The rules
Setting up the 104 cards, legal moves, groups, dealing, removed runs and scoring.
Strategy
Reveal face-down cards, build in the same suit, keep an empty column as a tool and prepare for each deal.
Verified games
Actual deals from the app with their game codes, including a game won in 117 moves, replayed move by move.
Frequently asked questions
How many suits should you choose? Why is dealing refused? How is the score calculated? Short answers.
On phone and tablet
The app is played in landscape orientation. It offers 1, 2 or 4 suits, Classic or Relaxed rules, a code for each game to replay or share a deal, undo for the last 100 actions and statistics.

