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Subject: Re: Fun with statistical fluctuation

Author: Timothy J. Frohlick

Date: 22:47:26 01/01/02

Go up one level in this thread


Gambit Tiger 2.0 aggressive on AMD 1400 with 512 Mb RAM.

00:00:00.0	1.66	8	150792	b4xa5
00:00:00.1	1.56	8	243849	Rd1-d8 Re7-e5 Rb8-a8+ Ka7-b7 b4xa5 b6xa5 Rd8-b8+ Kb7-c7
Rb8-e8 f7-f6 Bg3xe5+ f6xe5 Ra8xa5
00:00:00.1	1.54	9	312160	Rd1-d8 Re7-e5 Rb8-a8+ Ka7-b7 Rd8-b8+ Kb7-c7 Rb8-e8
f7-f6 Bg3xe5+ f6xe5 Ra8-a7+ Kc7-d6 b4xa5 b6xa5 Ra7xa5
00:00:02.4	1.54	10	1022493	Rd1-d8 Re7-e5 Rb8-a8+ Ka7-b7 Rd8-b8+ Kb7-c7 Rb8-e8
f7-f6 Ra8-a7+ Kc7-d6 b4xa5 b6xa5 Bg3xe5+ f6xe5 Ra7xa5
00:00:03.4	2.16	10	1150514	b4xa5 b6xa5 b5-b6+ Ka7-a6 Rd1-b1 a5-a4 b6-b7 Qe3-a7
Rb8-a8 Re7xb7 Ra8xa7+ Rb7xa7 Rb1-b8
00:00:04.6	2.70	11	1704976	b4xa5 b6xa5 b5-b6+ Qe3xb6 Rb8xb6 Ka7xb6 Rd1-d6+
Kb6-c5 Rd6-h6 Re7-e2 Rh6xh7 f7-f5 Rh7-c7+ Kc5-b5 Kh2-h3
00:00:06.9	2.70	12	2542588	b4xa5 b6xa5 b5-b6+ Qe3xb6 Rb8xb6 Ka7xb6 Rd1-d6+
Kb6-c5 Rd6-h6 Kc5-c4 Rh6xh7 a5-a4 Bg3-d6 Re7-d7 Bd6-e5
00:00:12.7	2.92	13	4704814	b4xa5 b6xa5 b5-b6+ Qe3xb6 Rb8xb6 Ka7xb6 Bg3-f2+
Kb6-a6 Rd1-d6+ Ka6-b5 Rd6-d5+ Kb5-a6 Rd5xg5 a5-a4 Bf2-c5 Re7-e2 Rg5-h5 Re2-c2
00:00:24.5	2.92	14	9385731	b4xa5 b6xa5 b5-b6+ Qe3xb6 Rb8xb6 Ka7xb6 Bg3-f2+
Kb6-a6 Rd1-d6+ Ka6-b5 Rd6-d5+ Kb5-a6 Rd5xg5 a5-a4 Bf2-c5 Re7-e2 Rg5-h5 Re2-c2
00:04:17.0	3.82	14	97933144	Rd1-d8

It seems that finally the score is nearly a point higher after over ten fold the
number of moves searched even though Rd1-d8 was considered early on.

Tim

On January 01, 2002 at 18:48:38, Dann Corbit wrote:

>On January 01, 2002 at 17:57:00, Gian-Carlo Pascutto wrote:
>
>>After changing a few things in the way my engine communicates
>>with WinBoard, I played a test game to see if I had not broken
>>Fritz's WinBoard adapter support.
>>
>>To my surprise, the following happened:
>>
>>[Event "Test game"]
>>[Site "GCP"]
>>[Date "2002.01.01"]
>>[Round "1"]
>>[White "Sjeng 12.7"]
>>[Black "Fritz 7"]
>>[Result "1-0"]
>>[ECO "C07"]
>>[PlyCount "73"]
>>
>>1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 Nc6 5. Bb5 dxe4 6. Nxe4 Bd7
>>7. d5 exd5 8. Qxd5 Qa5+ 9. Nc3 Nf6 10. Qg5 Ne4 11. Qe3 O-O-O
>>12. Qxe4 Re8 13. Qxe8+ Bxe8 14. O-O Bd6 15. Rd1 Nd4 16. Nxd4 cxd4
>>17. Rxd4 Bxh2+ 18. Kxh2 Bxb5 19. Bf4 Bc6 20. Rad1 Qf5 21. Kg1 Re8
>>22. f3 g5 23. Bg3 Qxc2 24. R4d2 Qf5 25. b4 b6 26. Rd6 Kb7
>>27. a4 Re3 28. Nb5 Bxb5 29. axb5 Re7 30. R6d5 Qf6 31. Rd6 Qc3
>>32. Rd8 Qe3+ 33. Kh2 a5 34. Rb8+ Ka7 35. Rdd8 Qf4 36. Bxf4 gxf4
>>37. Ra8+ 1-0
>>
>>Great way to start the new year, don't you think :)
>
>This does not look like any sort of accident.  A slow and steady buildup of
>strength until the finishing blow.  By here, for sure Sjeng has already won:
>[D]3R4/pk2rp1p/1p6/1P4p1/1P6/2q2PB1/6P1/3R2K1 b - -
>
>But the amazing move is this one:
>[D]1R6/k3rp1p/1p6/pP4p1/1P6/4qPB1/6PK/3R4 w - - bm Rdd8; am bxa5; c0 "WOW!";
>
>Absolutely incredible that Sjeng found Rdd8, since the vastly inferior bxa5
>looks so good to programs.  Now, bxa5 is a good enough move to probably win
>eventually.  But Rdd8 is a positive death blow!
>
>Which programs (after a good, long, think) choose Rdd8 over bxa5?
>
>You have really done something wonderful here.



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