Author: Uri Blass
Date: 18:00:34 12/18/04
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On December 18, 2004 at 20:40:28, Harvey Williamson wrote: >On December 18, 2004 at 18:21:08, Uri Blass wrote: > >>On December 18, 2004 at 17:47:24, Harvey Williamson wrote: >> >>>I left my computer on infinite analysis looking at the following position. I >>>noticed after about an hour when Junior was searching at depth 18 that the kns >>>had dropped from over 2000 to under 300! >>> >>>Why would that be? >>> >>> >>> >>>1. Nf3 d5 2. d4 c6 3. c4 e6 4. Qc2 Nf6 5. Bg5 dxc4 6. Qxc4 b5 7. Qc2 Bb7 8. e3 >>>Nbd7 9. Nbd2 a6 10. a4 Rc8 11. Be2 c5 12. d5 exd5 13. axb5 a5 14. O-O c4 15. e4 >>>dxe4 16. Nd4 * >> >>Most programs do not know to count nodes or to calculate nodes per second >>correctly when the number of nodes is bigger than 2^32. >> >>If you give it to search for an hour then it is natural to get more than >>2^32 nodes. >> >>Uri > >Thanks Uri! > >I have only ever noticed this with J9 but I guess from what you say all is >probably ok? I noticed that problem with most engines if I give them enough time to analyze more than 2^32 nodes. Junior is a fast searcher so searching 2^32 nodes may happen faster with it. Uri
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