Double Dummy Solver
Enter a deal and see every makeable contract, then play it out card by card against perfect defense.
What a double dummy solver does
A double dummy solver, or bridge solver, looks at all four hands and works out how many tricks each side can take in every denomination with best play from all four players. The result is a grid. For each declarer and each strain it shows the number of tricks that can be made against perfect defense, so you can read which games and slams were on and check whether the line you took at the table was the best one.
How to use it
- Click a seat in the compass, then click the cards it holds. The counter beside each seat shows how many are in.
- Random Deal fills whatever is still empty, so you can enter one hand and let the solver deal the rest.
- Press Analyze. The makeable contracts appear, and you can open any contract and play it out card by card. At every trick the solver shows which cards hold the result and which give a trick away.
Manual entry is free and needs no account. If you have a photo or a screenshot of a hand record, the upload option reads the cards for you, and the voice option lets you dictate them. Those two use credits.
Questions about the bridge solver
What does a double dummy solver show?
A grid of tricks: for each of the four declarers and each of the five strains, the most tricks that side can take when all four players see all 52 cards and play perfectly. From it you can read which games and slams were makeable and compare the line you took at the table with the best one.
Is the bridge solver free? Do I need an account?
Entering a deal by hand and analyzing it is free and needs no account. Reading the cards from a photo or from your voice uses credits, so those two need you to be signed in.
How do I enter a deal from a hand record or a BBO screenshot?
Click a seat in the compass and click its cards, or type each suit as a string of ranks such as AKQ2 in the quick input. Random Deal fills any seat you leave empty. If you have a screenshot or photo of the hand diagram, the photo option reads all four hands for you.
What does "double dummy" mean?
Play with every hand face up. The solver assumes each player sees all 52 cards, so it takes a finesse it knows is working and avoids one it knows is off. It tells you what was possible on the deal, which is not always what was reasonable with the information you had at the table. The double dummy solver guide explains the trick grid and the play mode in more detail.
How accurate are the trick counts?
Exact. The engine searches every legal line of play, so the numbers in the grid are proofs rather than estimates.
The photo reader did not get my cards right. What should I do?
It reads hand diagrams, not real playing cards. Use a clear image with all four hands visible and the diagram centered. You can also correct any card by hand before analyzing, or enter the deal manually.