Here are but a few examples of the many Dealmaster screens and printouts . why the Dealmaster Pro bridge simulator program is ideal for Bridge Players. Dealmaster Pro is so extensive in its capabilities that no serious bridge partnership should be without it and it is a must for teachers. You can restrict the dealing.

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If the code, on the other hand, uses a good random number generator such as the Mersenne Twister, I suspect we are seeing artifact of dealmatser memories. Try this for abouthands and I think you will find that the match is quite close.

And then the complaints about the number of voids, singletons and 8-card suits started. I haven’t been able to obtain an advantage from this yet, but I should be able to in the future.

The above mentioned data prove its effectiveness. One well liked program – BIg Deal – is now included in Dealmaster.

Dealmaster Pro

Now, any bridge hand generator that doesn’t do the BigBook method of generating hands now is being lazy and by lazy, I mean not reprogramming it. It did about 22 before it blocked not enough entropyand after that it took about 10, 15 seconds of playing around to get another set. Every time DM Pro deals are generated for club play, the user is invited to print a statistical summary.

Looking at some of the next hands where north did not hold the club 5, I’ve also noticed a very high percentage of hands where north holds an approximate club 5, for example the club 3, 4 or 6. In the front end by Kaj Backas, one needs to click a number of times with the mouse. A document describing the process is available by emailing dealmaster at dealmaster.

Yes the players still noticed a difference between computer hands and hand shuffled hands. I didn’t look at these hands but the test portion of the report proved that the results were as expected.


If you’re able to control your typing to the microsecond, you’ll be able to influence the RNG though not much, because they also bring in things like “number of free ddealmaster on the disk, system uptime, process id, Remember – most peoples hand shuffling does not give random results.

There are a number of other dealing programs out there. BTW, I was also a math major. I’m sure if Dealnaster was playing FreeDoom in another window, it would have deamaster faster: Finally, we believe DM Pro can create every possible bridge deal.

Hanoi5, on October, I suggest that anyone wishing to implement computer generated hands at their club start with a one month control period – where you actually shuffling everything by hand yourself, but tell them they were computer generated. When four or five dealmatser deals have been created, there is significant data for an informed judgment re accuracy of the shapes compared to standard expected. I don’t know how this things work but I remember someone made a deal generator in our federation in the 90’s and the seconds needle from the clock would start the randomness.

True, but my partner is a math major and I am a statistics minor and both of us are suspicious of the non-randomness of the hands so far.

Community Forum Software by IP. Oh, and the entropy-generators do handle “suspiciously repetitive same key typing” – i. If the code, for example, uses the standard C library random number generator, these complaints are likely valid–it is a very poor random number generator intended for quick “randomish” values for testing–no one should use it for serious simulations such as bridge dealing where a good approach to randomness is desirable.

After a while people accepted deqlmaster fact that they were now playing ‘really’ random deals yeah yeah, it’s not truely random, I know eealmaster, while they weren’t in the past.

All platforms have something sane for generating entropy and cryptographically-secure random numbers for seeds and such. You can do the same. The timing and location of the mouse clicks provide the randomness. To give just one example, I’ve noticed that there appear quite a lot of series of 5 or 6 hands in which one player picks up the same spot-card. Most players wouldn’t be able to evaluate “statistical norms” to save their life.


It would really help if someone knowledgeable in computer science took a look at the underlying code. I don’t know how Big deal is implemented in Deal Master Pro, but it wouldn’t make much sense to implement it without using the method Big deal uses to generate the random numbers. Given that the number of bridge deals is a little less than 2 96one would need a 96 bit Mersenne Twister.

While most of the hands are random, I’ve also noticed the relatively frequent occurance of non-random hands, or rather, series of non-random hands. It’s random number generator is mathematically more robust than the base one in Dealmaster, but no in a way that anyone would notice even if they played every day.

No one has proven it cannot. The data shows no bias toward excessive voids or singletons. In Big deal, the random generation is performed by involving input from the user. The data is accumulated. For example, noticing that north has held the club 5 for 4 or more hands in a row, I’ve started to expect north to hold the club 5 again on the next hand.

Deal Master Pro – BBO Discussion Forums

Is there another dealing program that will make appease the club members who want a more random hand generation – perhaps similar to the current ACBL tournament hands? Is it any wonder that hand shuffled hands are flatter with fewer singletons voids and long suits than there should be?

It includes a table with the frequencies for all possible hands. PrecisionL, on October, That ended the controversy.

Then let all the superstitious people with selective memory about voids and such come out and complain and make fools of themselves before you actually switch.

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