Author: Uri Blass
Date: 13:08:50 08/30/01
Go up one level in this thread
On August 30, 2001 at 12:50:24, Steve Maughan wrote:
>I've managed to play four games with my new 'toy'. All played on my Pocket iPAQ
>v 1.5 GHz P4. Yes I realise that there is quite a difference in hardware so I
>dug out my old chess programs. Three of the games were against Fritz 2 and one
>against Sargon 5. Pocket Fritz managed two draws. If Stefan M-K is reading
>this he might like to take a look at game four. Despite this being a *VERY*
>boring game, in the final position Fritz 2 claims a draw by 3 move repetition
>and Pocket Fritz is still showing +1.6 to white. Pocket Fritz also says it a
>draw - so the question is - does Pocket Fritz's engine recognise a draw by three
>move repetition?
>
>Here are the games:
>
>Steve
>
>
>[Event "?"]
>[Site "?"]
>[Date "2001.08.30"]
>[Round "?"]
>[White "Pocket Fritz"]
>[Black "Fritz 2.0 (1.5 GHz P4)"]
>[Result "0-1"]
>[PlyCount "89"]
>[EventDate "2001.??.??"]
>
>1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 dxc4 5. Qxc4 c6 6. Nf3 Nbd7 7. e4 Nb6 8.
>Qd3 Be6 9. b3 Bg7 10. Be2 c5 11. O-O cxd4 12. Nxd4 Nxe4 13. Nxe6 fxe6 14. Qxe4
>Bxc3 15. Bb5+ Kf7 16. Qf3+ Bf6 17. Rd1 Qb8 18. Bf4 e5 19. Bg3 Kg7 20. Qe4 Rc8
>21. Rab1 Rc5 22. Be2 Qc7 23. Bf3 Rc2 24. a4 Rb8 25. a5 Nc8 26. Qe1 b6 27. Be4
>Rc3 28. Rbc1 Rxc1 29. Rxc1 Qd6 30. Rd1 Qc7 31. Bd5 bxa5 32. Rc1 Qd6 33. Qxa5
>Rb4 34. Bc4 Nb6 35. Bf1 Rxb3 36. Qxa7 Rb2 37. h3 Qd2 38. Rc6 Nd5 39. Qa8 $4 {
>the losing move}
shredder5.32 on p200 never considers Qa8 as best
Pocket Fritz - Fritz 2.0 (1.5 GHz P4)
8/Q3p1kp/2R2bp1/3np3/8/6BP/1r1q1PP1/5BK1 w - - 0 1
Analysis by Shredder 5.32:
39.Rxf6 Kxf6
µ (-0.87) Depth: 1/2 00:00:00
39.Rxf6 Kxf6
µ (-1.40) Depth: 1/2 00:00:00
39.Rxf6 Kxf6
-+ (-2.05) Depth: 1/2 00:00:00
39.Bc4
µ (-1.15) Depth: 1/2 00:00:00
39.Bc4
= (0.15) Depth: 1/2 00:00:00
39.Bc4
= (0.15) Depth: 1/2 00:00:00
39.Bc4 Qe1+ 40.Kh2
= (-0.15) Depth: 2/4 00:00:00
39.Bc4 Qe1+ 40.Kh2
= (-0.15) Depth: 2/4 00:00:00
39.Qd7 h6
= (-0.10) Depth: 2/4 00:00:00
39.Qd7 Nf4
= (0.01) Depth: 2/4 00:00:00
39.Qc5 Kf7
= (0.02) Depth: 2/4 00:00:00
39.Qc5 Qd4
= (0.07) Depth: 2/4 00:00:00
39.Qc5 Qd4 40.Qc1
= (-0.10) Depth: 3/6 00:00:00
39.Rd6 Rb8 40.Qxb8 exd6 41.Qxd6
= (-0.01) Depth: 3/6 00:00:00
39.Rd6 Rc2 40.Rd8
= (0.10) Depth: 3/6 00:00:00
39.Rd6 e4 40.Rd7 Bd4
= (0.15) Depth: 4/8 00:00:00
39.Rd6 Rb1 40.Qa8 exd6 41.Qb7+ Rxb7
= (-0.10) Depth: 5/10 00:00:00
39.Rd6 Rb1 40.Qa8 exd6 41.Qb7+ Rxb7
³ (-0.60) Depth: 5/10 00:00:00
39.Rd6 Rb1 40.Rxd5 Qxd5 41.Qe3
-+ (-2.16) Depth: 5/10 00:00:00
39.Rxf6 Kxf6 40.Qd7 Rc2 41.Qa7
-+ (-2.15) Depth: 5/10 00:00:00
39.Rxf6 Nxf6 40.Qxe7+ Kg8 41.Qxf6
-+ (-1.80) Depth: 5/10 00:00:00
39.Rxf6 Kxf6 40.Qd7 Ra2 41.Bc4
-+ (-1.44) Depth: 5/10 00:00:00
39.Qc5 Nb4 40.Bxe5 Nxc6 41.Bxb2 Qxb2 42.Qxc6
-+ (-1.43) Depth: 5/10 00:00:00
39.Qc5 Rc2 40.Qxc2 Qxc2 41.Rxc2
µ (-1.08) Depth: 5/10 00:00:00
39.Qc5 Qd4 40.Qa3 Nb4 41.Rc7
= (-0.02) Depth: 5/10 00:00:01
39.Qa4 Qxf2+ 40.Bxf2 Nb6 41.Bxb6 Rxg2+ 42.Kxg2
= (-0.01) Depth: 5/10 00:00:01
39.Qa4 Qe1 40.Qa3 Rd2 41.Qa4
= (0.00) Depth: 5/10 00:00:01
39.Rc8 Qe1 40.Qc5
= (0.01) Depth: 5/10 00:00:01
39.Rc8 Qe1 40.Qc5 Rd2 41.Rd8
= (0.01) Depth: 5/10 00:00:01
39.Rc8 Nf4 40.Qc5 Ne2+ 41.Bxe2 Rb1+ 42.Kh2 Qxe2
= (-0.04) Depth: 6/12 00:00:02 57kN
39.Rd6 Rb1
= (-0.03) Depth: 6/12 00:00:03 78kN
39.Rd6 Rb1 40.Qd7 Rxf1+ 41.Kxf1 Ne3+ 42.fxe3 Qxd6
= (-0.03) Depth: 6/12 00:00:03 79kN
39.Rd6 Rb1 40.Rxd5 Rxf1+ 41.Kxf1 Qxd5
³ (-0.28) Depth: 7/14 00:00:03 97kN
39.Rd6 Rb1 40.Qd7 Rxf1+ 41.Kxf1 Qd1#
µ (-0.78) Depth: 7/14 00:00:03 98kN
39.Rd6 Rb1 40.Rxf6 Rxf1+ 41.Kh2 Nxf6 42.Qxe7+ Kh6 43.Qxf6
-+ (-1.93) Depth: 7/14 00:00:04 118kN
39.Qa4 Nc3 40.Qc4 Ne2+ 41.Bxe2 Qe1+ 42.Bf1 e6 43.Rxe6 Qxf2+ 44.Bxf2
-+ (-1.92) Depth: 7/14 00:00:04 128kN
39.Qa4 Nc3 40.Qc4 Ne2+ 41.Bxe2 Qe1+ 42.Bf1 Bh4 43.Bxh4 Qxf2+ 44.Bxf2
-+ (-1.57) Depth: 7/14 00:00:04 135kN
39.Qa4 Nf4 40.Rc7 Ne2+ 41.Bxe2 Qxe2 42.Qe8 Qd1+ 43.Kh2 Rc2
= (-0.06) Depth: 7/14 00:00:06 198kN
39.Qa4 Nf4 40.Rc7 Qe1 41.Qe8 Ne2+ 42.Kh2 Nxg3 43.Qf8+ Kxf8
³ (-0.31) Depth: 8/16 00:00:11 342kN
39.Qa4 Qe1 40.Qa3 Rb1 41.Rxf6 Kxf6 42.Qf3+ Nf4 43.Bh4+ g5 44.Bxg5+ Kxg5 45.h4+
Kxh4 46.Qg4+ Kxg4
µ (-0.81) Depth: 8/16 00:00:15 477kN
39.Qa4 Qe1 40.Qc4 Ne3 41.fxe3 Qxg3 42.e4 Rd2
µ (-0.97) Depth: 8/16 00:00:17 558kN
39.Qc5 e4 40.Rc8 Qd4 41.Bc4 Qxf2+ 42.Bxf2 Rb1+ 43.Kh2 Rh1+ 44.Kxh1
µ (-0.96) Depth: 8/16 00:00:18 587kN
39.Qc5 e4 40.Re6 Nf4 41.Bxf4 Qd1
³ (-0.61) Depth: 8/16 00:00:20 671kN
39.Qc5 e4 40.Re6 Rb1 41.Rxe7+ Bxe7 42.Qc3+ Qxc3
³ (-0.61) Depth: 8/16 00:00:22 721kN
39.Rc5 Nf4 40.Kh2 Rc2 41.Rxc2 Qxc2 42.Qd7 Qb2 43.f3 Nxg2
³ (-0.60) Depth: 8/16 00:00:44 1458kN
39.Rc5 Rb1 40.Qa6 Nc3 41.Rxe5 Bxe5 42.Qa1 Rxa1
³ (-0.59) Depth: 8/16 00:00:47 1576kN
39.Rc5 Rb1 40.Qa6 Nc3 41.Kh2 Qc1 42.Rc7 Qxf1 43.Qxf1 Rxf1 44.Rxc3
µ (-0.82) Depth: 9/18 00:00:59 2002kN
39.Rc8 e4 40.Kh2 e3 41.Qa8 Qxf2 42.Rg8+ Kf7 43.Bxf2 exf2
µ (-0.81) Depth: 9/18 00:01:35 3314kN
39.Rc8 Rb1 40.Qa6 e4 41.Rd8 e3 42.fxe3 Qxe3+ 43.Kh2 e6 44.h4
µ (-0.81) Depth: 9/18 00:01:43 3591kN
39.Rc8 e4 40.Qa8 Rb1 41.Rg8+ Kh6 42.Kh2 Rxf1 43.Qxd5 Qxd5 44.Rxg6+ Kxg6
µ (-1.06) Depth: 10/20 00:02:44 5761kN
39.Rc8 e4 40.Qa6 e3 41.fxe3 Qxe3+ 42.Kh2 Be5 43.Bxe5+ Qxe5+ 44.Kh1 Qe4 45.Kg1
µ (-1.39) Depth: 10/20 00:03:18 6895kN
39.Qa4 Qe1 40.Qc4 Ne3 41.fxe3 Qxg3 42.Rc7 Qxe3+ 43.Kh1 Qd4 44.g3 Qxc4 45.Rxc4
µ (-1.38) Depth: 10/20 00:04:38 9897kN
39.Qa4 Qe1 40.Qc4 Ne3 41.fxe3 Qxg3 42.Rc8 Rxg2+ 43.Bxg2 Qxe3+ 44.Kh2 Qg3+
45.Kxg3
µ (-1.03) Depth: 10/20 00:04:45 10174kN
39.Qa4 Qe1 40.Qc4 Ne3 41.Qd3 Nxf1 42.Qxf1 Rb1 43.Qxe1 Rxe1+ 44.Kh2
µ (-0.72) Depth: 10/20 00:05:00 10748kN
After Qa8 shredder can see at very small depth that black is winning(4 seconds
and depth 6) so I suspect that these games were at fast time control(I
understood that the pocket pc is something close to p100 and it means that
pocketFritz could probably find the +3 score for black after 8 seconds and
assuming branching factor of 3 it could avoid Qa8 after 25 seconds).
I believe that if you play slower time control Pocketshredder has better chances
against Fritz2 on good hardware.
Here is the analysis of shredder5.32 on p200 after Qa8
Pocket Fritz - Fritz 2.0 (1.5 GHz P4)
Q7/4p1kp/2R2bp1/3np3/8/6BP/1r1q1PP1/5BK1 b - - 0 1
Analysis by Shredder 5.32:
39...Ra2
= (-0.14) Depth: 1/2 00:00:00
39...Ra2 40.Qe8
² (0.44) Depth: 2/4 00:00:00
39...Ra2 40.Qe8
² (0.44) Depth: 2/4 00:00:00
39...Qe1 40.Bxe5
² (0.36) Depth: 2/4 00:00:00
39...Qe1 40.Qe8
= (0.16) Depth: 2/4 00:00:00
39...Qe1 40.Qe8 Ne3
= (0.14) Depth: 3/6 00:00:00
39...Rb6 40.Rc8 Qd1
= (0.12) Depth: 3/6 00:00:00
39...Rb6 40.Rc8 e6
= (0.10) Depth: 3/6 00:00:00
39...e4 40.Qc8 Bd4
= (0.09) Depth: 3/6 00:00:00
39...e4 40.Qe8 Qd4
= (0.12) Depth: 3/6 00:00:00
39...e4 40.Rc5 e6 41.Qe8
= (0.04) Depth: 4/8 00:00:00
39...Qe1 40.Qe8 Ne3 41.Rc1
= (0.03) Depth: 4/8 00:00:00
39...Qe1 40.Rc8 e6 41.Qa3
= (0.01) Depth: 4/8 00:00:00
39...Qe1 40.Qa3 Rd2 41.Qf3 Kg8
= (0.00) Depth: 5/10 00:00:00
39...e4 40.Rc5 Ne3 41.Bb5 Qe1+ 42.Kh2
= (-0.01) Depth: 5/10 00:00:00
39...e4 40.Rc8 Nf4 41.Bc4
= (-0.01) Depth: 5/10 00:00:00
39...Nf4 40.Bc4 Ne2+ 41.Kh2 Nxg3 42.Qf8+ Kxf8
= (-0.02) Depth: 5/10 00:00:00
39...Nf4 40.Bc4 Ne2+ 41.Kh2 Nxg3 42.Qg8+ Kh6 43.Kxg3
= (-0.13) Depth: 5/10 00:00:01
39...Nf4 40.Rc8 Qd5 41.Qa4 Nd3 42.Qe8
= (0.04) Depth: 6/12 00:00:02 61kN
39...Qe1 40.Qa3 Rb1 41.Qd3 Nb4 42.Bh4
= (0.03) Depth: 6/12 00:00:02 67kN
39...Qe1 40.Qa7 Nf4 41.Qxe7+ Bxe7 42.Rxg6+ Kxg6
³ (-0.31) Depth: 6/12 00:00:02 80kN
39...Rb1 40.Rxf6 exf6 41.Bf4
³ (-0.32) Depth: 6/12 00:00:03 99kN
39...Rb1 40.Rxf6 exf6 41.Bf4 exf4 42.Qf8+ Kxf8
³ (-0.67) Depth: 6/12 00:00:03 104kN
39...Rb1 40.Qa6 Nb4 41.Bxe5 Rxf1+ 42.Qxf1 Nxc6
-+ (-3.05) Depth: 6/12 00:00:04 126kN
39...Rb1 40.Rc8 Rxf1+ 41.Kh2 Qd1 42.Rg8+ Kh6 43.Qf8+ Kh5 44.Bxe5 Rxf2 45.Bxf6
exf6
-+ (-3.29) Depth: 7/14 00:00:05 164kN
39...Rb1 40.Qa6 Nb4 41.Qb6 Rxf1+ 42.Kh2 Nxc6 43.Qxc6 Kh6
-+ (-3.53) Depth: 8/16 00:00:08 244kN
Uri
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