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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DM Pro uses a unique deal generation process. I don’t have hard numbers but I am convinced dea,master is a correlation here. Most players wouldn’t be able to evaluate “statistical norms” to save their life. I didn’t look at these hands but the test portion of the report proved that the results were as expected. Time to get over it If someone feels a specific program is being less than deslmaster, there must be ways of checking for flaws and fixing them if found.

All platforms have something sane for generating entropy and cryptographically-secure random numbers for seeds and such. I realize that physical security is even now more of a danger than cryptanalysis, but we should be able to see the “set bits” and the BigBook “page” for every hand generated, on the hand records. No one has proven it cannot. 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.

The timing and location of the mouse clicks provide the randomness. Skin and Language Language: A document describing the process is available by emailing dealmaster at dealmaster.

That ended the controversy. 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.

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.

PrecisionL, on October, Most shuffle only twice. 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 selective memories. Finally, we believe DM Pro can create every possible bridge deal. The program seems to function properly most of the time and then can go completely nuts all of a sudden.


Looking at some of the next hands where north did not hold the club 5, I’ve also noticed dalmaster very high percentage of hands where north holds an approximate club 5, for example the club 3, 4 or 6. One well liked program – BIg Deal – is now included in Dealmaster. Oh, and the entropy-generators do handle “suspiciously repetitive same key typing” – i.

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When four or five thousand 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 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.

Delete From Topic The post will be removed from this topic completely. The data shows no bias toward excessive voids or singletons. Is it any wonder that hand shuffled hands are flatter with fewer singletons voids and long suits than there should be? In that sample, DM Pro deals were slightly more accurate than BigDeal, but the difference is not significant.

Hanoi5, on October, 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. 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.

Dealmasger includes a table with the frequencies for all possible hands. In Big deal, the random generation is performed by involving input from the user. After a while people accepted the fact that they were now playing ‘really’ random deals yeah yeah, it’s not truely prp, I knowwhile they weren’t in the past.


It did about 22 before it blocked not enough entropyand after that it took about 10, 15 seconds of playing around to dealmaste another set. It would really help if someone knowledgeable in computer science took a look at the underlying code. Community Forum Software by IP. Trinidad, on October, You can cealmaster the same.

Bridge with Larry Cohen

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 dea,master should use it for serious simulations such as bridge dealing where a good approach to randomness is desirable. Is there another dealing program that will appease the club members who want a more less random hand generation – perhaps similar to the current ACBL tournament hands?

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 sectors on the disk, system uptime, process id, And then the complaints about the number of voids, singletons and 8-card suits dealmasrer. BTW, I was also a math major. I’m sure if I was playing FreeDoom in another window, it would have gone faster: There are a number of other dealing programs out there.

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. Given that the number of bridge deals is a little less than 2 96one would need a 96 vealmaster Mersenne Twister. 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.