Quick answer: Chicago bridge (also called four-deal bridge) is a fixed-length format where players play exactly four deals, with vulnerability rotating on a set schedule. It uses the same bidding and card play as rubber bridge but eliminates the variable-length game, making it ideal for social play where table rotation or time limits matter.
If you’ve ever wanted to learn how to play Chicago bridge, you’ve chosen one of the most social and accessible formats of the game. Chicago bridge — formally known as four-deal bridge — was developed as a practical alternative to rubber bridge for situations where players can’t commit to an open-ended session. Each round consists of exactly four deals, takes roughly 20–30 minutes, and has a pre-set vulnerability schedule that removes any ambiguity about scoring. Whether you’re hosting a dinner party, running a bridge club rotation, or just want a tightly structured game with friends, Chicago bridge delivers everything great about bridge in a compact, fair package.
What Is Chicago Bridge?
Chicago bridge is a variant of contract bridge played over exactly four deals. Unlike rubber bridge — where a game continues until one partnership wins two games and the length is unpredictable — Chicago has a fixed structure. The name comes from the Standard Club of Chicago, where the format was popularised in the early twentieth century.
The key distinction between rubber bridge vs Chicago is length and vulnerability. In rubber bridge, vulnerability is earned by winning a game. In Chicago, vulnerability follows a fixed rotation regardless of the score. This makes Chicago fairer over short sessions and easier to score up at the end of the evening.
Setup and Dealing
Chicago bridge is played by four players seated at a table, traditionally labelled North, South, East, and West. North–South and East–West form the two partnerships. The setup is identical to standard contract bridge:
- A standard 52-card deck is used, with no jokers.
- Cards rank from Ace (highest) down to 2 (lowest).
- A second deck is usually shuffled by the dealer’s partner while the first is in play, to speed things up.
The dealer for the first deal is determined by drawing cards — highest card deals. After that, the deal rotates clockwise: Deal 1 is dealt by the player designated as first dealer, Deal 2 by the player to their left, and so on. After four deals, the round is complete and scores are settled.
The Chicago Vulnerability Schedule
This is what makes Chicago bridge unique. Vulnerability is fixed in advance, not earned through play. The schedule is:
| Deal | Dealer | Vulnerable |
|---|---|---|
| 1 | First dealer | Neither side |
| 2 | Second dealer | Dealer’s side only |
| 3 | Third dealer | Dealer’s opponents only |
| 4 | Fourth dealer | Both sides |
North ♠A Q 9 5 ♥8 4 2 ♦A 7 3 ♣K 6 5 | ||
West ♠10 4 3 ♥K 10 6 5 ♦10 6 4 ♣A 10 3 2 | East ♠8 6 ♥J 9 7 3 ♦Q 8 5 2 ♣J 9 7 | |
South ♠K J 7 2 ♥A Q ♦K J 9 ♣Q 8 4 |
This rotation ensures every partnership faces both vulnerable and non-vulnerable situations before the round ends. It also means you always know the vulnerability before the bidding begins — no surprises.
How Bidding Works in Chicago Bridge
The bidding in Chicago bridge is identical to standard contract bridge. If you already know how to play bridge, you’ll be right at home. For those newer to the game, here’s a summary:
Each bid names a number of tricks (from 1 to 7) and a trump suit — Spades, Hearts, Diamonds, Clubs — or No Trump. A bid of 1♥ means your side contracts to win at least 7 tricks (6 base + 1) with Hearts as trumps. Bids must always be higher than the previous bid, either in level or in suit rank (Clubs lowest, then Diamonds, Hearts, Spades, No Trump highest).
Players may also:
- Pass — make no bid this turn.
- Double — challenge the opponents’ contract, increasing penalties and bonuses.
- Redouble — if the opponents have doubled your contract, you may redouble, further multiplying the stakes.
Bidding ends when three consecutive players pass. The final bid becomes the contract. The player in the declaring partnership who first named the trump suit (or No Trump) becomes the declarer. Their partner is the dummy.
Play of the Hand
Once the contract is set, the player to declarer’s left makes the opening lead — any card face-up on the table. The dummy then lays their entire hand face-up, organised by suit, and declarer plays both hands.
Play proceeds in tricks: each player in clockwise order plays one card. Players must follow suit if possible. If they cannot, they may play any card including a trump. The highest card of the led suit wins the trick, unless a trump is played — in which case the highest trump wins. The winner of each trick leads the next.
The declaring side must win at least as many tricks as their contract requires. Winning more is good; winning fewer results in penalties.
Example Hand
Here is a typical Chicago bridge deal — Deal 4, both sides vulnerable, South is dealer:
North: ♠A Q 9 5 ♥8 4 2 ♦A 7 3 ♣K 6 5
South: ♠K J 7 2 ♥A Q ♦K J 9 ♣Q 8 4
East: ♠8 6 ♥J 9 7 3 ♦Q 8 5 2 ♣J 9 7
West: ♠10 4 3 ♥K 10 6 5 ♦10 6 4 ♣A 10 3 2
South opens 1♠, North raises to 3♠ (invitational), South bids 4♠. North–South have 26 high-card points between them and eight spades in the combined hands. Declarer can draw trumps and set up the diamond suit for an overtrick. Making 4♠ vulnerable scores 620 points — a significant swing in a Chicago round.
Chicago Bridge Scoring
Chicago bridge scoring follows the same underlying point system as rubber bridge but applies differently because there are no partial scores carried between deals.
Trick Points (Earned by Making Your Contract)
| Contract | Points per trick bid and made |
|---|---|
| Clubs or Diamonds (minor suits) | 20 per trick |
| Hearts or Spades (major suits) | 30 per trick |
| No Trump | 40 for the first trick, 30 for each subsequent trick |
Game and Part-Score Bonuses
This is where Chicago scoring differs most from rubber bridge. Because there are no carried-over part-scores, Chicago awards explicit bonuses:
| Achievement | Not Vulnerable | Vulnerable |
|---|---|---|
| Making game (100+ trick points) | +300 | +500 |
| Part-score (below game) | +50 | +50 |
| Small slam (12 tricks) | +500 | +750 |
| Grand slam (13 tricks) | +1000 | +1500 |
Undertrick Penalties
| Tricks down | Not Vulnerable (undoubled) | Vulnerable (undoubled) |
|---|---|---|
| 1st undertrick | 50 | 100 |
| Each subsequent | 50 | 100 |
Doubled and redoubled penalties increase substantially — a powerful incentive to bid accurately.
Worked Scoring Example
North–South bid and make 4♥ on Deal 4 (both vulnerable). Here’s the score:
- Trick points: 4 tricks × 30 = 120
- Game bonus (vulnerable): +500
- Total: 620 points to North–South
If they had gone one down, East–West would score 100 (vulnerable undertrick). That 720-point swing shows why vulnerability matters so much in Chicago bridge scoring.
At the End of Four Deals
After all four deals are played, each partnership totals their points. The side with the higher score wins. If playing for stakes, the difference in scores determines the amount. There’s no running total carried into the next Chicago round — each four-deal set is completely independent.
Common Mistakes to Avoid
- Ignoring vulnerability. Always check the deal number before bidding. Going down vulnerable when you didn’t need to bid game is an expensive error.
- Forgetting the part-score bonus. New players sometimes forget that every made contract — even a lowly 1♣ — earns the 50-point part-score bonus in Chicago. Don’t concede cheap contracts.
- Overbidding on Deal 1. Neither side is vulnerable on the first deal, so the risk-reward balance shifts. Be especially precise rather than stretching to marginal games.
- Misapplying rubber bridge rules. In rubber bridge, part-scores carry forward to help make game next hand. In Chicago they don’t. Bid each hand as its own independent game.
- Slow dummy play. Chicago is designed to be quick. Declarer should claim when the outcome is clear rather than playing out every card.
Pro Tips for Chicago Bridge
- Prioritise Deal 4. Both sides are vulnerable and the bonuses are largest. A well-bid slam or a successful game swing can decide the entire round on the last deal.
- Be aggressive on Deal 3 as dealer. Your opponents are vulnerable; you are not. This is the ideal deal to push for marginal games or sacrifice at a low cost.
- Defend accurately on Deal 2. You are not vulnerable but your opponents are. Defeating their game contract saves 500+ points — equivalent to bidding and making your own game.
- Signal clearly in defence. Because only four deals are played, there’s no time to recover from a poor defensive board. Clear count and attitude signals help your partner make the right decisions.
- Keep a running score. Note the scores after each deal. Knowing whether you’re ahead or behind heading into the final deal shapes your bidding strategy significantly.
Frequently Asked Questions
What is the difference between Chicago bridge and rubber bridge?
The main differences are length and vulnerability. Rubber bridge continues until one side wins two games, making session length unpredictable. Chicago bridge is always exactly four deals. Vulnerability in rubber bridge is earned by winning a game; in Chicago it follows a fixed schedule per deal. Chicago also awards explicit part-score and game bonuses on each deal, whereas rubber bridge awards a bonus only for winning the rubber.
How many deals are in a Chicago bridge game?
A Chicago bridge game always consists of exactly four deals. This is why it’s formally known as “four-deal bridge.” After four deals, scores are totalled and the round is complete. Players then typically rotate or begin a new four-deal set.
Do part-scores carry over in Chicago bridge?
No. Part-scores do not carry forward between deals in Chicago bridge. Each deal is scored independently. If you make a part-score on Deal 1, you receive the flat 50-point bonus for that deal and start fresh on Deal 2. This is a key difference from rubber bridge, where part-scores accumulate toward making game.
What happens if a deal is passed out in Chicago bridge?
If all four players pass on the first round of bidding, the deal is passed out (no contract is played). In Chicago bridge, a passed-out deal is typically redealt by the same dealer. Some house rules simply move to the next dealer — agree on the rule before you start playing to avoid disputes.
Can you play Chicago bridge with two people?
Chicago bridge is designed for four players in two partnerships. You cannot play the standard version with two people. However, there are two-player bridge variants (sometimes called “honeymoon bridge”) that borrow bridge mechanics for a pair. If you want to play Chicago-style bridge solo or with fewer players, bridge apps like Bridge Card Game Classic let you play against AI opponents using full Chicago rules.
Practice what you’ve learned
The best way to improve at bridge is to play — and Bridge Card Game Classic lets you play rubber bridge, Chicago bridge, and more against AI opponents at any skill level, right on your phone.
Play bridge free online or download the app to practice Chicago bridge scoring and strategy on real hands.