Author: Robert Hyatt
Date: 11:24:18 02/18/02
Go up one level in this thread
On February 18, 2002 at 12:47:19, Uri Blass wrote: >On February 18, 2002 at 08:57:47, David Dory wrote: > >>On February 18, 2002 at 06:35:53, Uri Blass wrote: >>> >>>I do not think that all of the programmers of today are stupid. >>>I guess that they found better ideas. >>> >>>Uri >>> >> >>Better ideas? That's a relative thing, and we have no way to really compare >>their ideas (on DB's hardware and software), with ideas used in Rebel, Fritz, >>CM, ChessTiger, etc., on a PC, except in a very artificial and abstract way. >> >>I believe in each case, the programmers found ideas that were APPROPRIATE for >>their system. After all, the GREAT idea's of today, would have been disastrous >>to implement on a Fidelity Chess Challenger running with a Zilog Z80 CPU at a >>BLINDING 4Mhz. >> >>The reasons DB would still be kicking ass today, were it still around and being >>updated, are: >> >> 1) Hsu and his team had a history of creating a fantastic chess computer, DT. >> For all intents and purposes, they really had a doctorate in chess computer >> science! >> >> 2) They used the considerable resources IBM gave them, not just for software >> improvements, but to build a bunch of custom high speed micro-chips and >> integrate them into the fastest chess computer of all time. (so far :-)) >> >> 3) After a long time working out the bugs, they brought in GM Joel Benjamin >> to fine tune the openings, etc. >> >>How many other developer's do this, to this extent, Uri? >> >>It isn't just that Hsu & team were brilliant, or had a TON of resources, or had >>such sensational experience building a custom chess computer. It was all these >>things together, and I believe the whole was equal to more than the sum of the >>parts, which were considerable, in this case. >> >>If you had several million to invest in a new fantastic chess playing computer, >>wouldn't you do what the DB team did? >> >>Dave > >No > >I believe in pruning rules and I would use the money to find better pruning >rules. > > > >Uri Pruning rules introduce error. As you go deeper, those errors are summed. The DB guys instead chose to design hardware to let them go deeper with _zero_ error in the software search, and some unknown level of error in the hardware search due to whatever kind of pruning they chose to implement there...
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