Author: Bernhard Bauer
Date: 23:56:36 03/13/00
Go up one level in this thread
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!!
>
>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
Bob's Crafty has no difficulty to find Qc2. Have a look.
10-> 4.36 2.15 1. Rxf7+ Kxf7 2. Qxc7+ Ke6 3. Qxb8
Qc1+ 4. Kh2 Qh6+ 5. Kg3 Qg5+ 6. Kf3
Qf5+ 7. Kg3 Qg5+ <HT>
11 6.71 -- 1. Rxf7+
11 10.79 1.13 1. Rxf7+ Kxf7 2. Qxc7+ Ke6 3. Qxb8
Qc1+ 4. Kh2 Qh6+ 5. Kg3 Qg5+ 6. Kf3
Qf5+ 7. Ke3 Qe4+ 8. Kd2 Qxd4+ 9. Ke2
Qe4+ 10. Kf1 Qd3+ 11. Kg1 Qd1+ 12.
Kh2 Qxa4
11 42.33 1.37 1. Qc2 c6 2. a5 Qh4 3. Qd1 Rb4 4. Rd3
Qd8 5. Rc3 Qh4 6. Rxc6 Rxd4
11-> 42.33 1.37 1. Qc2 c6 2. a5 Qh4 3. Qd1 Rb4 4. Rd3
Qd8 5. Rc3 Qh4 6. Rxc6 Rxd4
12 1:04 1.45 1. Qc2 c6 2. g3 Qh5 3. Rb3 Rxb3 4.
Qxb3 Qe2 5. Qb4 Qd1+ 6. Kg2 Qc2 7.
a5 Qf5
12-> 1:27 1.45 1. Qc2 c6 2. g3 Qh5 3. Rb3 Rxb3 4.
Qxb3 Qe2 5. Qb4 Qd1+ 6. Kg2 Qc2 7.
a5 Qf5
13 2:21 1.33 1. Qc2 c6 2. a5 Qh4 3. Qd1 Rb2 4. Rf6
Qe4 5. Rxc6 Rb1 6. Rc1 Rxc1 7. Qxc1
Qxd4
13-> 2:52 1.33 1. Qc2 c6 2. a5 Qh4 3. Qd1 Rb2 4. Rf6
Qe4 5. Rxc6 Rb1 6. Rc1 Rxc1 7. Qxc1
Qxd4
Kind regards
Bernhard
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