Author: Anson T J
Date: 07:40:23 01/20/04
Go up one level in this thread
On January 19, 2004 at 07:42:54, John Griffin wrote: >I left Shredder 8 running yesterday at FICS to test it out and see how it would >do and when I came back I was shocked it had lost 10 games straight to Shredder >7.04 playing on an AMD 2200+ and the hardware I was using was 2x AMD 2000+ and I >decided to examine some of the games and it seemed that Shredder was just giving >pieces away for free and playing really weird I have 4 games out of the 10 to >show how bad it was playing is it a bug or something causing it to play like >this? has anyone else experienced this type of thing aswell? any info will be >appreciated. Thanks > >[Event "ICS Rated blitz match"] >[Site "freechess.org"] >[Date "2004.01.19"] >[Round "Shredder 7.04"] >[White "Shredder 8"] >[Black ""] >[Result "*"] >[WhiteElo "2575"] >[BlackElo "2647"] >[TimeControl "180+2"] > >1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 Nc6 5. Nf3 Bb4+ 6. Nbd2 Qe7 7. a3 >Ngxe5 8. Nxe5 Nxe5 9. e3 Bxd2+ 10. Qxd2 d6 11. Be2 O-O 12. O-O b6 13. b4 >Bb7 14. Qc3 Ng6 15. Bg3 Nh4 16. c5 dxc5 17. bxc5 Nf5 18. Bf4 bxc5 19. Rac1 >Nh4 20. f3 Ng6 21. Bg3 Rfe8 22. e4 c6 23. Qe3 Nf8 24. Rxc5 Ne6 25. Rf5 a5 >26. Qc3 Ba6 27. Bxa6 Qa7+ 28. Rc5 Nxc5 29. Bf2 Nxe4 30. Bxa7 Nxc3 31. Re1 >Rxe1+ 32. Kf2 Rc1 33. Ke3 Nb1 >* Move 28. Rc5? Maybe your hash was too high which caused too little CPU utilisation. Heres my output for this position [d]r3r1k1/q4ppp/B1p1n3/p4R2/4P3/P1Q2PB1/6PP/5RK1 w - - 0 28 New game r3r1k1/q4ppp/B1p1n3/p4R2/4P3/P1Q2PB1/6PP/5RK1 w - - 0 1 Analysis by Shredder 8: 1.Rc5 Qxc5+ 2.Qxc5 Nxc5 = (0.03) Depth: 1/2 00:00:00 1.Rc5 Qxc5+ 2.Qxc5 Nxc5 -+ (-2.40) Depth: 1/4 00:00:00 1.Rc5 Qxc5+ 2.Qxc5 Nxc5 -+ (-2.40) Depth: 1/4 00:00:00 1.Kh1 Qxa6 2.Rd1 g6 3.Rf6 Rad8 4.Bd6 ± (0.99) Depth: 1/4 00:00:00 1.Kh1 Qxa6 2.Rd1 c5 3.Rfd5 Qe2 4.Rd7 ± (0.99) Depth: 1/7 00:00:00 1.Kh1 Qxa6 2.Rd1 c5 3.Rfd5 Qe2 4.Rd7 ± (0.93) Depth: 2/2 00:00:00 1.Kh1 Qxa6 2.Rd1 c5 3.Rfd5 Qe2 4.R5d2 Qb5 ± (0.93) Depth: 3/3 00:00:00 1.Kh1 Qxa6 2.Rd1 Red8 3.Qxa5 Rxd1+ 4.Qe1 ± (0.93) Depth: 4/4 00:00:00 1.Kh1 Qxa6 2.Rd1 Red8 3.Qxa5 Rxd1+ 4.Qe1 ± (0.93) Depth: 5/8 00:00:00 1.Kh1 Qxa6 2.Rd1 Red8 3.Qxa5 Rxd1+ 4.Qe1 Rxe1+ 5.Bxe1 Qxa3 6.Rxf7 ² (0.68) Depth: 6/6 00:00:00 1.Kh1 Qxa6 2.Rd1 Red8 3.Rxa5 Rxd1+ 4.Be1 Qxa5 5.Qxa5 ² (0.68) Depth: 6/12 00:00:00 1.Bf2 Qxa6 2.Rxa5 Qxa5 3.Qxg7+ Nxg7 ² (0.69) Depth: 6/12 00:00:00 1.Bf2 Qxa6 2.Rc1 g6 3.Rf6 Rac8 4.Rd1 ± (0.90) Depth: 6/12 00:00:00 1.Bf2 Qxa6 2.Rb1 Red8 3.Bb6 Qd3 4.Kf2 Qxc3 ± (0.81) Depth: 7/15 00:00:00 82kN 1.Bf2 Qxa6 2.Rb1 Red8 3.Bb6 Qd3 4.Qxg7+ Kxg7 5.Rxf7+ Kxf7 ² (0.56) Depth: 8/16 00:00:00 146kN 1.Bf2 Qxa6 2.Rb1 Red8 3.a4 Rd3 4.Qe5 Rd2 5.Qc3 ² (0.56) Depth: 8/16 00:00:00 172kN 1.Bf2 Qxa6 2.Rb1 Red8 3.Bb6 Rd3 4.Qc1 Nd4 5.Bxd4 Rxd4 ² (0.56) Depth: 9/17 00:00:00 318kN 1.Bf2 Qxa6 2.Rb1 Red8 3.Bb6 Rd3 4.Qc1 Nd4 5.Bxd4 Rxd4 6.Qc5 Qc4 7.Rb6 Qxc5 8.Rxc5 ² (0.44) Depth: 10/17 00:00:00 527kN 1.Bf2 Qxa6 2.Rb1 Red8 3.Bb6 Rd3 4.Qc1 Nd4 5.Bxd4 Rxd4 6.Qc5 Qc4 7.Rb6 Qxc5 8.Rxc5 ² (0.52) Depth: 11/19 00:00:01 812kN 1.Bf2 Qxa6 2.Rb1 g6 3.Rf6 Red8 4.Qe1 Rab8 5.Rxb8 Rxb8 6.Qc1 Qe2 7.Be3 Rb2 8.Qxc6 ² (0.37) Depth: 12/27 00:00:02 1785kN 1.Bf2 Qxa6 2.Bh4 a4 3.Re1 Qb6+ 4.Kh1 Qb3 5.Rxf7 Qxc3 6.Rxg7+ Kxg7 7.Bf6+ Qxf6 = (0.14) Depth: 13/29 00:00:07 5856kN 1.Bf2 Qxa6 2.a4 g6 3.Rf6 Rad8 4.Qc2 c5 5.Rc1 c4 6.Kh1 Qc6 7.Be1 Qc5 8.Qxc4 Qg1+ = (0.17) Depth: 14/32 00:00:22 17245kN 1.Bf2 Qxa6 2.a4 g6 3.Rf6 Rad8 4.f4 Rd7 5.Qc1 Qd3 6.Qxc6 Nd4 7.Rxg6+ hxg6 8.f5 Nxc6 = (0.02) Depth: 15/35 00:00:29 23101kN 1.Bf2 Qxa6 2.a4 Red8 3.Qa1 g6 4.Rf6 Qe2 5.Re1 Qc2 6.Rc1 Qe2 7.Re1 Qc2 8.Rc1 Qe2 9.Re1 Qc2 = (0.02) Depth: 16/38 00:00:47 36454kN 1.Bf2 Qxa6 2.a4 Red8 3.Re1 Rd3 4.Qb2 g6 5.Rf6 Rad8 6.Qb6 Qa8 7.Rxf7 Kxf7 8.Qxa5 = (0.01) Depth: 17/39 00:01:15 56900kN 1.Bf2 Qxa6 2.a4 g6 3.Re5 f6 4.Rc5 Nxc5 5.Bxc5 Kf7 6.Qxf6+ Kxf6 7.Be7+ Rxe7 8.e5+ Kxe5 9.Re1+ Qe2 10.Rc1 = (0.00) Depth: 18/43 00:02:57 131536kN 1.Bf2 Qxa6 2.a4 Red8 3.Rb1 Rd3 4.Qe1 Ra3 5.Ra1 Rxa1 6.Qxa1 g6 7.Rf6 Qe2 8.Bb6 c5 9.Qc1 Rd8 = (-0.01) Depth: 19/47 00:04:44 208341kN It only has Rc5 as the best move during ply 1 and rejects it before finishing the search at that depth. In my tests so far, Shredder 8 is beating Deep Fritz 8 in 3 minute games S8, Blitz:3' 0 1 Shredder 8 90.0/160 56.25% +43 ELO 2 Deep Fritz 8 70.0/160 43.75% -43 ELO Dual AMD 2400+ 1 Thread Each 128 MB hash each Default Books
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