Author: Wayne Lowrance
Date: 13:40:30 08/18/00
Go up one level in this thread
On August 18, 2000 at 13:58:00, Mark Young wrote: >On August 18, 2000 at 13:33:10, James Thompson wrote: > >>In an earlier post the following position was proposed: >> >>[D] kbb2rr1/1p6/p3p1q1/PN1pB3/1n6/R3Q3/5PB1/6K1 w - - >> >>Varoius responses indicated some pretty rapid solution times for various >>programs: some as short as 8 seconds. When I set up this position for Fritz6a, >>I left the computer running overnight and it still had not found the solution >>mate in 8 beginning with 1.Qa7+. I used the normal settings for mate analysis >>in the Fritz program. Any idea why Fritz could locate the mate? I must admit I >>was surprised and disappointed when my "number 1" rated program could not find >>the solution and others could. :( >> >>James > >You have something setup wrong, this position is a no brainer for just about any >chess program. > >New position >kbb2rr1/1p6/p3p1q1/PN1pB3/1n6/R3Q3/5PB1/6K1 w - - 0 1 > >Analysis by Fritz 6: > >1.Bxb8 > -+ (-6.53) depth: 1/3 00:00:00 >1.Bxb8 Qxg2# > -+ (-#1) depth: 1/4 00:00:00 >1.Nc7+ > -+ (-13.25) depth: 1/8 00:00:00 >1.Nc7+ Bxc7 > -+ (-10.69) depth: 1/8 00:00:00 >1.Bg3 > -+ (-10.41) depth: 1/8 00:00:00 >1.Bg3 axb5 > -+ (-9.62) depth: 1/9 00:00:00 >1.Bg3 Qb1+ 2.Kh2 Rh8+ 3.Bh3 axb5 > -+ (-9.75) depth: 2/9 00:00:00 >1.Bg3 Qb1+ 2.Kh2 Rh8+ 3.Bh3 axb5 > -+ (-9.75) depth: 3/12 00:00:00 1kN >1.Bg3-- > -+ (-10.41) depth: 4/16 00:00:00 2kN >1.Bg3 Qb1+ 2.Kh2 Bxg3+ 3.fxg3 > -+ (-10.56) depth: 4/19 00:00:00 5kN >1.Qa7+! > = (0.00) depth: 4/19 00:00:00 8kN >1.Qa7+ Bxa7 2.Nc7+ Kb8 3.Ne8+ Ka8 4.Nc7+ > = (0.00) depth: 5/11 00:00:00 9kN >1.Qa7+ Bxa7 2.Nc7+ Kb8 3.Ne8+ Ka8 4.Nc7+ > = (0.00) depth: 6/20 00:00:00 10kN >1.Qa7+ Bxa7 2.Nc7+ Kb8 3.Ne8+ Ka8 4.Nc7+ > = (0.00) depth: 7/21 00:00:00 17kN >1.Qa7+ Bxa7 2.Nc7+ Kb8 3.Ne8+ Ka8 4.Nc7+ > = (0.00) depth: 8/28 00:00:00 25kN >1.Qa7+! > +- (#8) depth: 9/26 00:00:00 33kN > >(Young, MyTown 18.08.2000) Fritz6a finds mate immediately Qa7+! +-(#8) depth 9/26 00:00:00 33kN Wayne
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