Author: blass uri
Date: 22:11:41 06/05/00
Go up one level in this thread
On June 05, 2000 at 19:18:56, Pete R. wrote: >Here is the diagram Mr. Uri posted last week: > >[D]r2qr3/pb3pk1/np3b1N/2pp3Q/3P4/1PR1P1P1/P4PBP/5RK1 w - - 0 1 > >I let Fritz 5.32 run the weekend on it, and after a great deal of >thought it decided the best move is...1. e4!!. > >Analysis by Fritz 5.32: > >-+ (-2.94) 1.dxc5 Bxc3 2.Nxf7 00:00:00 >= (-0.25) 1.Nxf7 00:00:00 >² (0.31) 1.Nxf7 00:00:00 >= (0.25) 1.Nxf7 Qe7 00:00:00 >³ (-0.47) 1.Nxf7 Qe7 2.Ne5 00:00:00 >³ (-0.44) 1.Rfc1 00:00:00 >³ (-0.41) 1.Rfc1 Qd7 2.Nf5+ Kg8 00:00:00 >³ (-0.37) 1.Rd3 00:00:00 >³ (-0.34) 1.Rd3 Qd7 2.dxc5 Nxc5 3.Nf5+ Kg8 00:00:00 >³ (-0.31) 1.Qxf7+ 00:00:00 >² (0.50) 1.Qxf7+ Kxh6 2.Qxb7 Nb4 00:00:00 >= (0.06) 1.Qxf7+ Kxh6 2.Qxb7 Nb4 3.a3 00:00:00 >= (0.09) 1.Nxf7 00:00:00 >² (0.44) 1.Nxf7 Qd7 2.Ne5 Bxe5 00:00:00 >² (0.53) 1.Nxf7 Qe7 2.Nh6 Rh8 3.Nf5+ Kf8 00:00:00 >² (0.56) 1.Nxf7 Qd7 2.Nh6 Kf8 3.Nf5 Rac8 00:00:00 >² (0.47) 1.Nxf7 Qe7 2.Nh6 Bc8 3.Qxd5 Nc7 4.Nf5+ Bxf5 5.Qxf5 cxd4 00:00:00 >² (0.69) 1.Nxf7 Qc7 2.Nh6 Rf8 3.Nf5+ Kg8 4.f4 Rae8 5.Nh6+ Kg7 00:00:03 >± (0.75) 1.Nxf7 Qc7 2.Nh6 Rh8 3.Nf5+ Kf8 4.Qg6 Bg7 5.Rd1 Rd8 00:00:08 >² (0.69) 1.Nxf7 Qc7 2.Nh6 Rad8 3.Nf5+ Kf8 4.a3 Qf7 5.Qxf7+ Kxf7 00:00:24 >± (0.81) 1.Nxf7 Qc7 2.Nh6 Rh8 3.Nf5+ Kf8 4.Qg6 Bg7 5.Bxd5 Bxd5 00:01:27 >± (0.81) 1.Nxf7 Qc7 2.Nh6 Rf8 3.g4 Kh8 4.Nf7+ Kg8 5.Qg6+ Bg7 00:03:49 >± (0.84) 1.g4 00:28:08 >± (1.06) 1.g4 Rh8 2.Qxf7+ Kxh6 3.f4 Rg8 4.g5+ Bxg5 5.Qxb7 Nc7 01:22:25 >± (1.00) 1.g4 Rh8 2.Qxf7+ Kxh6 3.f4 Rg8 4.Qxb7 Nc7 5.h3 Bg7 01:41:17 >² (0.50) 1.g4 Rh8 2.Qxf7+ Kxh6 3.f4 Rg8 4.Qxb7 Nb4 5.g5+ Bxg5 04:56:05 >² (0.53) 1.Nxf7 05:04:04 >² (0.69) 1.Nxf7 Qd7 2.Ne5 Bxe5 3.dxe5 Qe6 4.f4 Rh8 5.Qg5+ Kf7 09:27:46 >± (0.72) 1.e4 16:27:07 >± (0.78) 1.e4 dxe4 2.g4 Rh8 22:38:47 >± (0.84) 1.e4 dxe4 2.g4 Rh8 3.Qxf7+ Kxh6 4.Qxb7 Nc7 5.Rh3+ Kg7 37:03:44 > >Final depth reached is 16 ply. As you can see it took 16.5 hours on a PII >400 to decide on 1.e4!!. According to my analysis (although not completely >exhaustive) I do think this is the best move and white likely wins in all >lines: > >1. e4!! dxe4 2. g4 Rh8 > >other tries: > > A) 2...Bc8 3. Qxf7+ Kxh6 4. Rh3+ Bh4 5. Qh5+ Kg7 6. Rxh4 Qf6 > 7. Qxe8 Qxh4 8. Re1 +-. > > B) 2...Bh4 3. Nf5+ Kg8 4. g5 Qd7 5. g6 fxg6 6. Qxg6+ Kf8 7. Rg3 +-. > > C) 2...Bg5 3. Nf5+ Kf6 4. f4 exf3 5. h4 Bd2 6. Bxf3 Rh8 7. g5+ Ke6 > 8. Re1+ Bxe1 9. Re3+ +-. > >3. Qxf7+ Kxh6 4. Rh3+ Bh4 5. Qxb7 and white wins: > > a) 5...Nc7 6. dxc5 bxc5 (...Kg7 7. cxb6 axb6 8. Rc3 Rc8 > 9. Rfc1 Bxf2+ 10. Kxf2 +-) 7. Rxh4+ Qxh4 8. Qc6+ Kg7 > 9. Qxc7+ Kg8 10. h3 +-. > > b) 5...cxd4 6. f4 Nc7 7. Qxe4 Kg7 8. Qe5+ Bf6 9. Rxh8 Kxh8 > 10. Qh5+ Kg8 11. Qg6+ Kf8 12. g5 +-. > > c) 5...Qg5 6. Qxa6 Qxg4 (...Rag8 7. f3 cxd4 8. Qc4 e3 9. Rc1 Rg6 > 10. Qxd4 Rd8 11. Qe4 +-) 7. f3 exf3 8. Rfxf3 Rae8 9. Qf1 +-. > >So black is dead meat after 1...dxe4. Black's only serious alternative is > >1....Rh8, leading to the line 1. e4 Rh8 2. Qxf7+ Kxh6 3. Rf3 Rf8 >4. Qxb7 and now Nb4 appears best for black. I've analyzed a number of >continuations and have not been able to prove an ironclad win for white >in all of them, but white definitely has the upper hand and black is >merely defending. Chessmaster6000(ss=10) is clearly faster than Fritz5.32 Here are the results of chessmaster6000 after some hours: (0.25) Nxf7 0:00:32 depth 1/8 (0.35) g4 0:02:36 depth 1/8 (0.94) g4 0:04:46 depth 1/9 (0.91) g4 0:07:14 depth 1/10 (0.33) g4 0:19:48 depth 1/11 (0.53) e4 1:18:55 depth 1/11 (0.58) e4 2:46:04 depth 2/12 Uri
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