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Subject: Re: Junoir 6 Evaluation

Author: Fabio Leone

Date: 01:24:54 03/14/00

On March 13, 2000 at 20:38:44, Vincent Lejeune wrote:

>[D]1r6/2p2pk1/6p1/2QpP1q1/P2P4/5R2/5PP1/6K1 w - - 0 1
>
>
>In this position Junior 6 played 42. Qc2!! all other programs that i've tested
>(Crafty 17.07, Hiarcs 7.32, Fritz6 light 3 min on a celeron 450) evaluate Rxf7+
>two pawns above Qc2, but 42. Rxf7+ Kxf7 43. Qxc7+ Ke6 44. Qxb8 seems to be a
>very deep forced draw (see line in game below)
>
>So, how Junior 6 can see this repetition draw :
>
>- Evaluation (queen against a king in open lines) ?
>- Full check extension (each check extend one ply, too big tree explosion in my
>sens) ?
>- Reduced check extension (one check extend some plies,but this is 32 plies deep
>!) ?
>
>Can someone test this position in junior 6 and give analysis please ?
>This would help to understand the mechanism to find 42. Qc2!!


New position
1r6/2p2pk1/6p1/2QpP1q1/P2P4/5R2/5PP1/6K1 w - - 0 1

Analysis by Junior 6.0:

1.e5-e6 Rb8-b1+ 2.Kg1-h2 f7xe6 3.Qc5xc7+
  ±  (0.89)   Depth: 3   00:00:00
1.Rf3xf7+ Kg7-h6 2.Rf7-h7+ Kh6xh7 3.Qc5xc7+ Kh7-h6 4.Qc7xb8
  +-  (2.60)   Depth: 3   00:00:00  1kN
1.Rf3xf7+ Kg7-h6 2.Rf7-h7+ Kh6xh7 3.Qc5xc7+ Kh7-h6 4.Qc7xb8
  +-  (2.60)   Depth: 3   00:00:00  1kN
1.Rf3xf7+ Kg7xf7 2.Qc5xc7+ Kf7-e6 3.Qc7xb8 Qg5-c1+ 4.Kg1-h2 Qc1-f4+ 5.Kh2-h3
Qf4xf2
  +-  (1.52)   Depth: 6   00:00:00  15kN
1.Rf3xf7+ Kg7xf7 2.Qc5xc7+ Kf7-e6 3.Qc7xb8 Qg5-c1+ 4.Kg1-h2 Qc1-h6+ 5.Kh2-g3
Qh6-g5+ 6.Kg3-f3 Qg5-f5+ 7.Kf3-e2 Qf5-c2+ 8.Ke2-e3 Qc2xa4
  +-  (1.79)   Depth: 9   00:00:00  62kN
1.Rf3xf7+ Kg7xf7 2.Qc5xc7+ Kf7-e6 3.Qc7xb8 Qg5-c1+ 4.Kg1-h2 Qc1-h6+ 5.Kh2-g3
Qh6-g5+ 6.Kg3-f3 Qg5-f5+ 7.Kf3-e2 Qf5-c2+ 8.Ke2-e3 Qc2-e4+ 9.Ke3-d2 Qe4xd4+
10.Kd2-e1
  ±  (0.97)   Depth: 12   00:00:03  1100kN
1.Qc5-c2 c7-c5 2.e5-e6 f7xe6 3.d4xc5 Qg5-e5 4.c5-c6 Qe5-a1+ 5.Kg1-h2 Qa1-e5+
6.g2-g3 Rb8-h8+ 7.Kh2-g2
  ±  (1.03)   Depth: 12   00:00:05  1544kN
1.Qc5-c2 c7-c5 2.e5-e6 f7xe6 3.d4xc5 Qg5-e5 4.Rf3-e3 Qe5-f6 5.Re3-c3 d5-d4
6.Rc3-b3 Rb8xb3 7.Qc2xb3
  ±  (0.98)   Depth: 15   00:00:23  6997kN









>
>There's the game with the drawing line :
>
>[Event "ICS Rated standard match"]
>[Site "192.168.0.2"]
>[Date "2000.03.12"]
>[Round "?"]
>[White "Deep Junior"]
>[Black "Xie Jun"]
>[Result "1-0"]
>[ECO "C92"]
>[WhiteElo "2666"]
>[BlackElo "2647"]
>[Annotator "DRAW ???"]
>[PlyCount "99"]
>[EventDate "2000.??.??"]
>
>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
>O-O 9. h3 a5 10. d4 a4 11. Bc2 exd4 12. Nxd4 Nxd4 13. cxd4 d5 14. e5 Ne4 15.
>Qe2 Rb8 16. Nc3 Nxc3 17. bxc3 Bd7 18. Qd3 g6 19. Qf3 Be6 20. Bh6 Re8 21. Qf4
>Rb6 22. Re3 Qd7 23. Bd1 b4 24. cxb4 Rxb4 25. a3 Rb2 26. Rc3 Reb8 27. Rac1 R8b7
>28. h4 Rb1 29. h5 Rxc1 30. Qxc1 Bf5 31. Bc2 Bxc2 32. Qxc2 Qg4 33. Qxa4 Rb1+ 34.
>Kh2 Rb8 35. Qa7 Rc8 36. hxg6 hxg6 37. a4 Bf8 38. Bxf8 Kxf8 39. Rf3 Kg7 40. Kg1
>Qg5 41. Qc5 Rb8 42. Qc2 (42. Rxf7+ Kxf7 43. Qxc7+ Ke6 44. Qxb8 Qc1+ 45. Kh2
>Qf4+ 46. Kh3 Qh6+ 47. Kg3 Qg5+ 48. Kf3 Qf5+ 49. Ke3 Qe4+ 50. Kd2 Qxd4+ 51. Ke2
>Qc4+ 52. Ke3 Qe4+ 53. Kd2 Qf4+ 54. Ke2 Qc4+ 55. Ke3 Qe4+ 56. Kd2 Qf4+ 57. Kd3
>Qc4+ 58. Kd2 Qf4+) 42... Rb4 43. e6 Rc4 44. Rxf7+ Kg8 45. Qb3 Qc1+ 46. Kh2 Qh6+
>47. Kg3 Qg5+ 48. Kf3 Qh5+ 49. Ke3 Qg5+ 50. Kd3 (50. Kd3 Qd8 51. e7 Qe8 52. Rf8+
>Qxf8 53. exf8=Q+ Kxf8 54. a5) 1-0

LG2000 is again the best: 0,93s for Qc2! Jouni Uski 02:05:03 03/14/00
- Re: LG2000 is again the best: 0,93s for Qc2! Jeremiah Penery 21:12:26 03/14/00
  - Re: LG2000 is again the best: 0,93s for Qc2! Jouni Uski 22:04:11 03/14/00
- Re: LG2000 is again the best: 0,93s for Qc2! James Robertson 09:31:50 03/14/00
- Re: LG2000 is again the best: 0,93s for Qc2! Robert Hyatt 06:05:50 03/14/00

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