Author: Uri Blass
Date: 19:03:32 08/17/00
Go up one level in this thread
On August 17, 2000 at 20:42:02, Uri Blass wrote: >On August 17, 2000 at 19:29:07, Uri Blass wrote: > >>On August 17, 2000 at 14:21:30, Christoph Fieberg wrote: >> >>>On August 17, 2000 at 13:52:51, Uri Blass wrote: >>> >>>>On August 16, 2000 at 06:40:10, Christoph Fieberg wrote: >>>> >>>>>>>>1.Lxd2 Sf6+ 2.gxh8S Txh8+ 3.Th7 fxg1D 4.c8D exd1D 5.bxa8D >>>>> >>>>>>>I think that this line is not a draw. >>>>> >>>>>>>White wins by 5.d8Q+(possible lines 5...Kg3 6.Qd6+ Kf2 7.Qd4+ Kf1 8.Qcc4+ Qe2 >>>>>>>9.Qxe2+ Kxe2 10.Nxg1+ hxg1 11.Qxg1 or 5...Rxc8 6.bxc8Q+ Kg3 7.Qd6+ Kf2 8.Qcc5+) >>>>>>> >>>>>>>Uri >>>>> >>>>>I agree that after 4.c8D exd1D 5.d8Q+! (instead of 5.bxa8Q) White will win. >>>>> >>>>>But what about the preventive 4....Kg3 (instead of exd1D). Is this also a forced >>>>>win for White? At the moment I analyse it with Fritz6 (will take some time). >>>>> >>>>>Regards, >>>>>Christoph >>>> >>>>I did not analyze the position but only gave it to Junior5.9. >>>> >>>>after 4...Kg3 Junior5.9 fails high on the move Rxh8 >>>> >>>>evaluation at depth 13(after the typical 0.3 addition for fail high moves) is >>>>1.03 pawns for white. >>>> >>>>I used pentium200MMX for 2 hours to get the evaluation(my pentiumIII450 is busy >>>>in another task). >>>> >>>>Uri >>> >>>Hi Uri, >>>I agree that 4...Kg3 is not sufficient - but in the meantime I found a line >>>after 1... Ng5+!! which seems to be a forced win for Black! Check this: >>> >>>1.... Ng5+!! 2.gxh8Q Rxh8+ 3.Rh7 fxg1Q! 4.e8Q Rxh7+ 5.gxh7 h1Q 6.Bxc2 Kg3+ >>>7.Kxg5 Qc5+ 8.Qe5+ Qxe5+ 9.Nxe5 Qh4+ 10.Kg6 b1Q 11.c8Q Qb6+ 12.Qc6 Qg4+ 13.Kh6 >>>a1Q 14.Rxa1 Rxa1 -+ >> >>Hi christhophe, > >Sorry, should be Christoph(I could copy and paste to avoid the mistake) >>Junior5.9 agrees that 1...Ng5+ is better. >> >>Main line after few hours on p200MMX begins with: >>1...Ng5+ 2.gxh8Q Rxh8+ 3.Rh7 fxg1Q 4.Bxc2 b1Q 5.c8Q Rxh7+ >> >>The evaluation is 2.46 pawns for black at depth 13(1725726 knodes) >> >>Uri > >Junior falled high at depth 14(2343520 knodes) and is very happy about Ng5 >evaluation 2.76 pawns for black(the normal +0.3 when Junior fails high). > >Junior did not solve the fail high problem and continues to consider Ng5 at >depth 14. > >regards,Uri Junior5.9 solved the fail high with score 2.87 pawns for black(3565564 knodes). The main line was changed and the main line now is 1...Ng5+ 2.gxh8Q Rxh8+ 3.Rh7 Rxh7+ 4.gxh7 Nf7+ 5.Kg7 fxg1Q Uri
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