Spades - Expert AI

Play popular variants: Partnership Spades, Mirror Spades, Suicide Spades, Whiz Spades, and Solo Spades (Cut Throat), and more!

Just learning Spades? The NeuralPlay AI will show you suggested bids and plays. Play along and learn!

Features include:

• Undo.

• Hints.

• Offline play.

• Detailed statistics.

• Replay hand.

• Skip hand.

• Customization. Choose the deck backs, color theme, and more.

• Play checker. Let the computer check your bids and plays throughout the game and point out differences. Great for learning!

• Review the play of the hand trick by trick at the end of the hand.

• Six levels of computer AI to provide challenges for beginning to advanced players.

• Unique thinking AI to provide a strong AI opponent for different rule variations.

• The Rest Are Mine (TRAM). Claim the remaining tricks when your hand is high.

• Achievements and leaderboards.

Play with your favorite rules. Rule customizations include:

• Jokers and/or deuces as high trump.

• Passing.

• Nil.

• Blind nil.

• Blind bids.

• Nil/blind nil bonus.

• Minimum bid.

• Bag penalty.

• Bag (overtrick) points.

• Failed bid penalty.

• 10-for-200.

• Initial lead.

• Trumping first trick.

• Spades can be lead anytime or must be broken first.

Spades is a trick-taking card game for four players in two partnerships. The goal of the game is to be the first team to reach 500 points by winning tricks and bidding accurately.

Gameplay

The game is played with a standard deck of 52 cards. The cards are ranked from high to low: A, K, Q, J, 10, 9, 8, 7, 6, 5, 4, 3, 2. Spades are the trump suit.

The game begins with the dealer dealing 13 cards to each player. Players then bid on the number of tricks they think their team will take. The minimum bid is 1, and the maximum bid is 13.

After the bidding, the player to the left of the dealer leads with any card. The other players must follow suit if possible. If a player cannot follow suit, they may play any card, including a spade.

The highest card of the suit led wins the trick, unless a spade is played, in which case the highest spade wins. The player who wins the trick leads the next card.

Scoring

* Each trick taken counts as 10 points.

* If a team bids and makes their bid, they receive 10 points for each trick they bid.

* If a team bids and fails to make their bid, they lose 10 points for each trick they missed.

* If a team bids and makes 13 tricks, they receive a bonus of 100 points.

* If a team bids and fails to make 13 tricks, they lose 100 points.

Expert AI Logic

The expert AI in Spades uses a combination of logic and heuristics to make its decisions.

Bidding

* The AI evaluates its hand and estimates the number of tricks it can take.

* It considers the number of spades in its hand, the distribution of the other suits, and the bids of the other players.

* It uses a probabilistic model to calculate the probability of making each bid.

Card Play

* The AI chooses the card to lead based on the following factors:

* The number of spades in its hand

* The distribution of the other suits

* The bids of the other players

* The current state of the trick

* The AI tries to lead cards that will force the other players to play spades or high cards.

* It also tries to avoid leading cards that will allow the other players to win the trick cheaply.

Defense

* The AI tries to prevent the other team from making their bid.

* It does this by playing spades to trump their tricks.

* It also tries to force the other team to lead cards that are difficult for them to win.

Conclusion

The expert AI in Spades is a powerful opponent that can challenge even the most experienced players. It uses a combination of logic and heuristics to make its decisions, and it is constantly learning and improving.