Author: Uri Blass
Date: 08:02:01 11/25/02
Go up one level in this thread
On November 25, 2002 at 10:48:11, Terry McCracken wrote: >On November 25, 2002 at 01:08:27, Uri Blass wrote: > >>On November 24, 2002 at 13:22:46, Terry McCracken wrote: >> >>>On November 24, 2002 at 10:23:38, Robert Hyatt wrote: >>> >>>>On November 23, 2002 at 19:16:23, Jay Hysenbeg wrote: >>>> >>>>>On November 23, 2002 at 08:17:02, Terry McCracken wrote: >>>>> >>>>>>On November 23, 2002 at 00:32:08, Robert Hyatt wrote: >>>>>> >>>>>>>On November 23, 2002 at 00:13:32, Terry McCracken wrote: >>>>>>> >>>>>>>>On November 22, 2002 at 23:45:01, Jay Hysenbeg wrote: >>>>>>>> >>>>>>>>>[D]8/4p3/4Q3/8/8/k1p3PP/1q3P1K/8 w - - 0 1 >>>>>>>>>wKh2,Qe6,Pf2,g3,h3/bKa3,Qb2,Pc3,e7 >>>>>>>>> >>>>>>>>>is this a problem with my deepfritz7 or does this happen with your df7 too. mine >>>>>>>>>fails to see that Qxe7 is a loosing line >>>>>>> >>>>>>> >>>>>>>Is it certain Qe7 loses? All I can see is a long series of checks and I don't >>>>>>>see how black can find a safe haven from them to promote the pawn... >>>>>>> >>>>>>>I let Crafty run a while and it says 0.00... >>>>>> >>>>>> >>>>>>Bob White can't lose, I just inserted the [D] to look at the position. >>>>>> >>>>>>It looked totally uninteresting. >>>>>> >>>>>>Terry >>>>>chesstiger 15/14 and gambit tiger both see that Qxe7 is losing for white score >>>>>jumps by 5 pawns >>>> >>>> >>>>Would you post the "losing" line? I don't see how black can ever escape the >>>>checks. >>> >>>Bob I looked at it again and it appears I really underestimated the position! >>> >>>After 1.Qxe7+?? ...Ka2!! going to b1 and it really goes down hill for White >>>quickly! >>> >>>I should have seen this...arrghh! getting rusty...."creak"....sigh... >>> >>>Terry >>> >>>P.S. 1...Kb3 is ok I think but Ka2!! and White will have to resign, Black will >>>get out of check and promote his pawn. >>> >>>Try it yourself, you'll see White starts to lose ground for grabbing the pawn. >>> >>>It's a tricky endgame and Fritz 7 is slower than Tiger to spot the loss. >>>HIARCS 8, Junior 7, Shredder 6 all see a lost position but not straight away. >>> >>>Only Tiger spots it instantly! Bravo Christophe! >>> >>> >>>Juni >> >>I guess that tiger see is based on evaluation and it may see a wrong win when >>there is only a draw(I do not know if this is the case). >> >>I expect intelligent programs to see that black is better(unless they can see >>that white can force a draw) but I also expect them not to evaluate the position >>as +5. >> >>As a human I think that only black can win the endgame so the score should be >>better for black unless I see a forced draw. >> >>Uri > >You rely too much on computers....Qxe7+?? loses for White and Qa6+!! draws for >White. How can you be sure without testing it with computers? Yace latest line is New position [D]8/8/8/8/4Q3/6PP/1qp2P1K/1k6 w - - 0 1 Analysis by Yace 0.99.56: 4.Qe4-f5 Qb2-d4 5.Kh2-g2 Kb1-a1 6.Qf5xc2 Qd4-d5+ 7.Kg2-g1 Qd5-g2+ 8.Kg1xg2 = (0.00) Depth: 17 00:18:04 397608kN (Blass, Tel-aviv 25.11.2002) Uri
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