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Subject: Re: Another Rybka Exchnage Sac

Author: Daniel Mehrmannn

Date: 23:42:45 12/28/05

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On December 29, 2005 at 01:14:21, Mike Byrne wrote:

>[Event "Blitz_5_5_QUAD RR_2"]
>[Site "WIN-64-MB"]
>[Date "2005.12.29"]
>[Round "4"]
>[White "Rybka v1.0 Preview 2 x64"]
>[Black "Gandalf60"]
>[Result "1-0"]
>[ECO "E00"]
>[PlyCount "96"]
>[EventDate "2005.??.??"]
>
>1. d4 Nf6 2. c4 e6 3. f3 d5 4. Nc3 Nc6 5. e3 Be7 6. Nh3 O-O 7. Nf2 Re8 8. Be2
>Bb4 9. Bd2 e5 10. dxe5 Rxe5 11. cxd5 Nxd5 12. e4 Nxc3 13. bxc3 Ba5 14. Qc2 Re8
>15. O-O Bb6 16. Kh1 Qe7 17. Nd3 Ne5 18. Nxe5 Qxe5 19. Bd3 Rd8 20. Rad1 Be6 21.
>f4 Qc5 22. e5 Bg4 23. Bxh7+ Kh8 24. Bd3 Bxd1 25. Rxd1 c6 26. a4 a6 27. Rf1 Kg8
>28. Be1 Ba5 29. Rf3 b5 30. Bf1 bxa4 31. Bf2 Qd5 32. Rh3 g6 33. Bh4 f5 34. exf6
>Qf5 35. Qxa4 Qb1 36. Qc4+ Rd5 37. Qe2 Rf8 38. Qe6+ Rf7 39. Be1 Qb8 40. Rh6 Qf8
>41. Qh3 Rxf6 42. Rh8+ Kf7 43. Rh7+ Qg7 44. Bc4 Kf8 45. Bxd5 Qxh7 46. Qxh7 cxd5
>47. Bf2 Rc6 48. Qh8+ Ke7 1-0
>
>[d] r2r2k1/ppp2ppp/1b6/2q1P3/5Pb1/2PB4/P1QB2PP/3R1R1K w - - 0 23; bm Bxh7
>
>haven't test any engines - my machine is tied up -- but it looks like a nice
>move with good follow-up play

Yes, interesting position. Homer has some problems with it :(

Homer experimental by Daniel Mehrmann, http://www.homer-chess.com,
info@homer-chess.de
CPU0: AuthenticAMD x86 Family 6 Model 10 Stepping 0 2191 MHz
GUI: Tablebases with 0 pieces found! [Cache: 64 MB + internal 0.00 MB]
Engine: Homer experimental (64 MB)
by Daniel Mehrmann
uci(): moves command without moves!,  rc = 1
  1/10	 0:00 	+0.29 	1.Rb1 (2.157)
  2/02	 0:00 	+0.29 	1.Rb1 h6 (2.189)
  3/09	 0:00 	 0.00 	1.Rde1 Kh8 2.Be3 (6.062) 195
  4/13	 0:00 	+0.28 	1.Rde1 h6 2.Be3 Qc6 (21.196) 271
  5/13	 0:00 	+0.28 	1.Rde1 h6 2.Bh7+ Kh8 3.Be3 Qc4 (28.171) 299
  6/18	 0:00 	+0.13 	1.Bxh7+ Kh8 2.Be4 Bxd1 3.Qxd1 Kg8 4.Bxb7 (100.710) 322
  7/16	 0:00 	+0.23 	1.Bxh7+ Kh8 2.Be4 Bxd1 3.Qxd1 Kg8 4.Bxb7 Rab8 5.Be4
(163.807) 317
  8/18	 0:00 	 0.00 	1.Bxh7+ Kh8 2.Be4 Bxd1 3.Qxd1 Rab8 4.Qh5+ Kg8 5.Qh7+ Kf8
6.Qh8+ Ke7 7.Qh4+ Kf8 8.Qh8+ (198.612) 317
  8/19	 0:01 	+0.17 	1.Rde1 g6 2.c4 Qd4 3.Re3 f6 (419.311) 343
  8/19	 0:01 	+0.17 	1.Rde1 g6 2.c4 Qd4 3.Re3 f6 (451.880) 348
  9/21	 0:02 	+0.25 	1.Rde1 g6 2.Be4 Rab8 3.h3 Bf5 4.Bxf5 gxf5 5.Rd1 (772.997)
346
  9/21	 0:02 	+0.25 	1.Rde1 g6 2.Be4 Rab8 3.h3 Bf5 4.Bxf5 gxf5 5.Rd1 (876.552)
346
 10/20	 0:03 	 0.00 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qb1 g6 6.Rh3
(1.241.010) 346
 10/22	 0:05 	 0.00 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qb1 g6 6.Rh3
(1.772.125) 351
 11/20	 0:05 	-0.12 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qb1 g6 6.c4
Qxc4 7.Rxd1 (2.049.921) 354
 11/21	 0:08 	-0.12 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qb1 g6 6.c4
Qxc4 7.Rxd1 (2.967.665) 353
 12/24	 0:10 	+0.05 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qe4 g6
6.Qxd5 Rxd5 7.Rh3 Kg7 (3.560.806) 354
 12/24	 0:13 	+0.05 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qe4 g6
6.Qxd5 Rxd5 7.Rh3 Kg7 (4.804.593) 354
 13/25	 0:16 	-0.12 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qb1 g6
(5.987.528) 355
 13/25	 0:26 	-0.12 	1.Rde1 Qd5 2.Bxh7+ Kh8 3.Be3 Bxe3 4.Rxe3 Bd1 5.Qb1 g6
(9.370.825) 353
 14/27	 1:24 	 0.00 	1.Rde1 g6 2.Be3 Qa3 3.Be4 c6 4.Qb3 Qxb3 5.axb3 Bxe3 6.Rxe3
Be6 7.c4 Rd2 (30.278.713) 358
 14/27	 2:10 	 0.00 	1.Rde1 g6 2.Be3 Qa3 3.Be4 c6 4.Qb3 Qxb3 5.axb3 Bxe3 6.Rxe3
Be6 7.c4 Rd2 (47.089.993) 361
 15/28	 3:13 	+0.03 	1.Rde1 g6 2.Be3 Qa3 3.Bf2 Ba5 4.Rc1 Be6 5.Bh4 Rd7 6.Qb1
Bxc3 7.Qxb7 (68.870.035) 355
 15/28	 4:25 	+0.03 	1.Rde1 g6 2.Be3 Qa3 3.Bf2 Ba5 4.Rc1 Be6 5.Bh4 Rd7 6.Qb1
Bxc3 7.Qxb7 (92.616.040) 348
best move: Rd1-e1 time: 4:27.875 min  n/s: 348.567  nodes: 93.085.696



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