Author: Terry McCracken
Date: 08:08:52 11/25/02
Go up one level in this thread
On November 25, 2002 at 01:01:12, Robert Hyatt 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 I am way beyond rusty, because I +still+ don't see it. :) > >Qxe7 Ka2 (your move) >Qe6+ > >Now what? Kb1? If so, I'd probalby try Qe4+ and expect c2. Now I play >f4 and wait for black to try to unpin the pawn. Ka1 Qa4 Kb1 and we dance >again. > >How does black make progress here? > >Note that this is human analysis, not computer analysis. I let crafty crank >on it a while yesterday or whenever and it simply said 0.00 very quickly and >didn't change. > >I'm not sure the above is very accurate. I didn't dwell on this for many >minutes, so I probably overlooked something simple, but I've generally found >that with a queen, a queen and pawn is usually not enough of a shelter to stop >the forever checks. > >I was trying to create a position where > >(1) black controls the b1-c2-d3-etc diagonal so that white can't pin the >pawn there; > >(2) the black king would then be at b1, and somehow checks along the b-file >are impossible so that a check on the 8th rank could be met by c1=Q blocking >the check; > >(3) I don't see how to do both, although from your comments apparently it is >possible or else white can be forced to a queen location where the pin along >the diagonal can't be played? Keep going!;-) Date: 25/11/2002 White: Terry McCracken Black: Chess Tiger 14.0 1. Qxe7+ Ka2 2. Qe6+ Kb1 3. Qe4+ c2 4. f4 Qc3 5. Qb7+ ( 5. h4 Kb2 6. Qb7+ Kc1 ( 6... Ka3 7. Qa6+ Kb4 8. Qb7+ Kc4 9. Qe4+ Kc5 10. Qe7+ ( 10. Qf5+ Kd4 11. Qf6+ ( 11. Qd7+ Ke3 ) 11... Kd3 ) 10... Kd4 11. Qd6+ Ke3 ) ) 5... Kc1 Terry Don't take the pawn! Qa6+!! Draws! Interesting posistion. Notice 4.f4 Qc3! winning for Black.
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