Author: Dann Corbit
Date: 10:30:40 05/10/00
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On May 10, 2000 at 10:52:19, Mark Andreoli wrote: [snip] > 1.I have heard time after time that "there is only one best move in any given >position"(It makes sense /the one that wins the fastest) . In this case most of >us agreed it was 19.Bf8! Ok my question is why >didn't My Fritz 5 ,6 or Hiarcs find this move especially given the fact that F6 >is in the top 5 on the SSDF list?Are they weak analyzers? It is clearly not a true statement. From one position there may be ten distinct moves, all of which mate in 5 and no other move mates faster. Therefore, even by the criteria you have established, the assumption that there can only be one best move is clearly false. Further (in my opinion) any move which leads to a large advantage is a "best move" in the sense that it is used with chess programs. Unless a chess program searches the tree clear to the end (nearly impossible from almost all board positions) there is always some doubt left as to what is the best move. > 2.How can it be that the above mentioned engines (F5/6/Hiarcs)manage to "Kick >Butt" time and time again on other engines who found Bf8 but _they_ were unable >to find it? So What engine is _really _ the strongest? Nobody knows which engine is the strongest. Of the top ten, all of them have tactical ability (at least) which is on the GM level. I suspect also that even with GM's, some of them will pick e5. It turns out (after long analysis) that e5 also leads to a decisive advantage. It is true that it will probably take longer to get to checkmate, but it is still a winning position. No computer plays perfect chess -- far from it! But as for tactical ability, they are truly excellent and also tireless. If you have a position which is particularly compelling, you can have five different engines think about it all night and you may see some excellent results that way. > 3. Given the fact that I do play a lot of tournament chess what _computer >chess program_ (Will the truly best analyzing engine please _stand up_!) do I >have to buy now to get a "second opinion" on my game positions. I still can't >express how disappointed I am in F5/F6 and Hiarcs for not finding 19.Bf8! >(remember Nenad Aleksic found it in only about 20 seconds over the board!) Computers will sometimes make brilliancies that GM's will not see. On the other hand, if a benefit is too deep, they often won't see it at all. If you read a lot of messages from this forum, you will come to understand why.
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