One complete exact hand
Choose North, East, South or West as the exact seat and enter its cards suit by suit.
Bridge SolverConstrained hand generation
Generate Bridge Deals with Precise Hand Constraints
Generate complete bridge deals from known cards and precise descriptions of the unseen hands. Use the resulting boards for simulation, partnership discussion, bidding practice or a focused teaching set.
Analyses require a Bridge Solver account.North exact♠ A K 8 4♥ Q T 7♦ K 9 3♣ J 8 2
EastHCP 5-10♠ exactly 6Weak 2 spade
SouthHCP 11-15♥ 4+!unbalanced
Matching deals1,000 / 1,000
Workflow
How constrained deal generation works
The generator builds a population for analysis rather than producing unrelated random boards.
- 01
Choose the exact seat
Enter one known 13-card hand, or switch to an all-descriptive setup when every seat should be generated.
- 02
Describe each other hand
Set point ranges, suit minimums and maximums, fixed cards, shapes and bidding-related conditions.
- 03
Preview the scenario
Generate a small preview to catch impossible assumptions or a population that does not match your intention.
- 04
Generate the analysis set
Request the desired deal count and use the accepted boards directly in a contract simulation.
Constraints
Control the hand population
Every active condition is applied to a complete 52-card deal, with duplicate-card and range validation before the run begins.
Known cards elsewhere
Assign individual honors or spot cards to descriptive seats when the auction or previous play makes ownership known.
HCP ranges
Set a minimum and maximum from 0 to 37 HCP for each generated seat.
Suit-length ranges
Require exact, minimum or maximum lengths independently for spades, hearts, diamonds and clubs.
Shape and bidding presets
Use balanced, semibalanced, unbalanced, notrump, passed-hand, weak-opening, overcall, control and keycard rules.
Logical expressions
Combine direct syntax and presets with AND, OR and negation to represent alternatives or exclude a class of hands.
Example
Build a weak-two practice set
A teacher wants deals after East opens a weak 2 spades and North has a known hand with a borderline takeout-double decision.
Translate the lesson into constraints
Enter North exactly. Describe East with the Weak 2 spade preset, which requires the configured six-card suit quality, and add the point range used by the lesson. Constrain South and West broadly enough to keep realistic variety. If a specific auction promises a known honor or side-suit shortage, add that information explicitly.
Preview several boards before launching a large run. The boards can support a partnership discussion about doubles and advances, or they can feed a contract comparison that asks whether one action produces a better result. The generator is most useful when the constraints express the learning objective without scripting the answer.
Uses
From generation to useful bridge work
For simulation, the generated boards become the common sample on which contracts are compared. For partnership practice, they expose the range of hands behind an auction agreement. Teachers can use a narrow scenario to discuss recurring decisions, while analysts can inspect why a result changes when a point or shape assumption moves.
Bridge Solver currently keeps generation inside the analysis workflow. It is not a standalone dealing program and does not claim PBN, LIN or CSV export. Previewed and saved boards remain connected to the assumptions and results that produced them, which is useful when the goal is a reproducible analysis rather than a deck file.
Good generation habits
- Start broad and add one auction inference at a time.
- Check that every seat can still hold 13 cards.
- Inspect preview boards for unintended shapes.
- Record partnership-specific definitions in the description.
- Watch accepted deals and attempts for rare populations.
Methodology
Sampling, rejection and pick rate
The generator samples complete deals and rejects layouts that fail an active condition. The accepted set therefore reflects the combined constraints, not the frequency of an unconstrained random deal. Tight conditions require more attempts. Conditions that are individually possible can still conflict when combined across four seats.
Requested count describes the target; generated count describes the boards actually accepted. Pick rate is accepted deals divided by attempts. A low rate is not automatically an error, but it is a reason to inspect the model and avoid claiming more precision than the accepted sample supports.
Questions
Bridge deal generator FAQ
Is there a separate random deal generator?
Deal generation currently lives inside the Simulation workflow. You configure a scenario, preview matching boards and then generate the set used by a simulation analysis.
Can I fix all four exact hands?
The current Simulation interface supports one complete exact hand. Other seats can receive fixed individual cards and descriptive constraints, or all four seats can be generated descriptively without an exact hand.
Can generated deals be exported as PBN, LIN or CSV?
No standalone PBN, LIN or CSV export is currently offered by the web deal-generation workflow. Generated boards can be previewed and inspected as part of the saved analysis.
What happens if my constraints are too narrow?
Bridge Solver rejects non-matching samples until it reaches the requested count or the attempt limit. Very rare or contradictory conditions can produce a low pick rate or fewer accepted deals than requested.
Can I exclude a hand type?
Yes. Custom filter expressions support negation and combinations, so rules such as !balanced or !weak 2 hearts can remove holdings from the generated population.
Keep exploring
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Run your own analysis
Generate the deals your question needs
Enter the known cards, describe the unseen hands and preview a population before using it in a simulation.