Author: Uri Blass
Date: 04:25:23 01/04/03
Go up one level in this thread
On January 04, 2003 at 06:24:15, Sune Fischer wrote: >On January 04, 2003 at 06:01:45, Kurt Utzinger wrote: > >>Hi Sune >>This position is an easy win for white who threatens 1.Qc8 +- and against this >>deadly threat black's only move is 1...Qa8+ but it does not help as can be seen >>from the following analysis of Shredder7 and Fritz8005 on P4 1.8/32 MB hash > >Hi, > >No I don't think it is that simple, black can do some damage before the pawn >promotes. Most programs can find Qc8 with a +9 score if there is no other >tactics, even mine :) > > >>Utzinger,K - Shredder 7 >>3q4/3P2kp/5p2/p7/1p1R2P1/8/2Q2PK1/4r3 b - - 0 1 >> >>Analysis by Shredder 7: > >>1...Qa8+ 2.f3 Qd8 3.Kf2 b3 4.Qc3 Re5 5.Qc8 Qe7 6.d8B Qe6 >> +- (5.89) Depth: 10/35 00:00:40 10657kN >> +- (4.39) Depth: 12/39 00:03:19 54725kN >> >>(Utzinger, MyTown 04.01.2003) >>************************************************************************************ >>Utzinger,K - Fritz 8 >>3q4/3P2kp/5p2/p7/1p1R2P1/8/2Q2PK1/4r3 b - - 0 1 >> >>Analysis by Fritz 8: > >>1...Qa8+-- >> +- (4.37) Depth: 9/35 00:00:03 2570kN >> +- (3.22) Depth: 14/45 00:01:54 82279kN >> >>(Utzinger, MyTown 04.01.2003) > >Interesting that the score drops going even deeper. > >Crafty takes a long time here: >12 197 20426 104027337 1. ... Qa8+ 2. f3 Qd8 3. Rd2 Kf8 4. Qxh7 Re5 5. Rd6 >Rg5 6. Qh8+ Rg8 7. Qxf6+ Qxf6 8. Rxf6+ Ke7 >13 345 59922 328433020 1. ... Qa8+ 2. f3 Qd8 3. Rd2 Qb6 4. d8=Q Re2+ 5. >Rxe2 Qxd8 6. Rd2 Qe7 7. Qf5 Qe5 8. Rd7+ Kh6 9. Rxh7# > >S. Crafty finds the right line. There is a trap here 1...Qa8+ 2.f3 Qd8 3.Qc8? Qe7 and suddeenly movei can fail a low to a draw score. Movei needs some minutes to avoid 3.Qc8 at depth 11 I do not know if this trap could impress thinker. Uri
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