Author: Uri Blass
Date: 00:09:06 01/05/03
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On January 04, 2003 at 21:52:32, Robert Hyatt wrote: >On January 04, 2003 at 21:41:31, scott farrell wrote: > >>On January 04, 2003 at 15:01:34, Robert Hyatt wrote: >> >>Yes it is about the knight on a8. A human doesnt need a horizon to see the >>knight on a8 should be scored way down, and will probably be lost, but most >>programs if it cant see it being lost inthe qsearch, consider the piece to be >>safe. > >Maybe. Crafty has code to hate a knight on a8, and the PV it had showed the >knight getting back out quickly. Here is the PV: > > 15 1:44 0.96 2. Nxb6 Nxd3 3. Nxa8 Nf4 4. Rfe1 Nf6 > 5. Re5 b6 6. Nc7+ Kd7 7. Na6 Bd6 8. > Re3 N4xh5 9. Rae1 Nxg3 10. fxg3 > >As you see, in that variation, the knight gets out pretty quickly. The >only issue is does white have time to do that, or does white have to handle >some other threat by black that prevents getting the knight out? That is not >easy to compute for me (as a human) or crafty (as a computer). > >My gut reaction is that this is winning for _white_... not black... if white >plays well. If white doesn't realize that the knight is dangerously close to >being lost on a8 and take immediate action to extricate it, I could easily see >a program losing that knight by a misstep here or there... 5...b6 in your main line seems wrong 5...Bd6 6.Ra5 Bb8 and the knight cannot get out. Uri
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