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Subject: Re: Endgame: test position

Author: John Merlino

Date: 08:34:58 09/18/01

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On September 18, 2001 at 10:59:33, Eduard Nemeth wrote:

>I think this is not easy, or?
>
>First the game:
>
>[Event "Czech Extra League"]
>[Site "?"]
>[Date "2001.??.??"]
>[Round "?"]
>[White "Frolik,M"]
>[Black "Posta,P"]
>[WhiteElo "2315"]
>[BlackElo "2160"]
>[ECO "D36"]
>[Result "1-0"]
>
>1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3 Nbd7 6. e3
>O-O 7. cxd5 exd5 8. Bd3 c6 9. Qc2 h6 10. Bh4 Ne8 11. Bxe7
>Qxe7 12. O-O Ndf6 13. Rab1 Nd6 14. b4 a6 15. Ne5 Ng4
>16. Nxg4 Bxg4 17. Rfe1 Qg5 18. Kh1 Bf5 19. Bxf5 Qxf5
>20. Qxf5 Nxf5 21. a4 b5 22. Ra1 Nd6 23. Ra2 Rfb8 24. Rea1
>bxa4 25. Rxa4 Rb6 26. g3 Nc4 27. R1a2 Kf8 28. Ne2 Nd6
>29. Nf4 Ne4 30. Rc2 Ke7 31. Nd3 f6 32. Kg2 Ng5 33. Kf1 Ne6
>34. Ke2 Nc7 35. Rca2 Kd6 36. Kd2 Ra7 37. Nc5 Ra8 38. Rc2
>Ra7 39. h4 Ra8 40. Nd3 Ne6 41. Rca2 Ra7 42. Ke2 Nc7 43. Nc5
>Ke7 44. Kf3 Kd6 45. h5 Ra8 46. Kg4 Rab8 47. Nxa6 Nxa6
>48. Rxa6 Rxb4 49. Ra7 R4b7 50. Kf5 Rxa7 51. Rxa7 Rb2 52. f3
>Rb3 53. Kf4 Rb4 54. Kf5 Rb3 55. Rxg7 Rxe3 56. f4 c5
>57. dxc5+ Kxc5 58. Kxf6 d4 59. g4 d3 60. Rc7+ Kd4 61. g5 d2
>62. Rd7+ Kc3 63. Rxd2 Kxd2 64. g6 Kd3 65. Kg7 Ke4 66. Kxh6
>Kxf4 67. g7 Re8 68. Kg6 Re5 69. h6 1-0
>
>Position after move 62. White played now strong  63. Rxd2! then after 63. g6 Rd3
>it will be a Endgame with two Queens. Stronger move is also 63. Rxd2 and white
>win easy!
>
>[D]8/3R4/5K1p/6PP/5P2/2k1r3/3p4/8 w - -
>
>What says you program?
>
>Eduard

CM8000 believes that 63.g6 leads to a Q vs. QP endgame, but 63.Rxd2 leads to a Q
vs. R endgame. It appears to prefer the first option....

Initial position:

Time	Depth	Score	Positions	Moves
0:00	4/5	0.94	21024		1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Qxh5 5. f5
0:00	5/6	0.82	31716		1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Qxh5 5. f5 Ke4
0:01	6/7	1.84	106674		1. g6 Rg3 2. g7 Rg4 3. f5 Rg5 4.
					Rd8 Rg1
0:02	7/8	1.77	232428		1. g6 Rg3 2. g7 Rg4 3. Kf7 Rxf4+
					4. Kg6 Kc2 5. Kxh6 Rf6+ 6. Kh7
0:06	8/9	3.12	667429		1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Kc3 5. Qc8+ Kb3 6. Qb8+
					Kc4 7. Kg6 Qd4 8. Kxh6 Qf6+ 9. Kh7
0:12	9/10	3.17	1447654		1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Ke4 5. Qg6+ Kxf4 6. Qxh6+
					Kf3 7. Qf8 Qd7 8. Ke5+ Ke3 9. h6
0:27	10/11	3.01	3254500		1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Ke4 5. Qg6+ Kxf4 6. Qxh6+
					Kf3 7. Qf8 Qd7 8. Kg6+ Ke4 9. h6
					Qg4+ 10. Kf7
1:47	11/12	3.21	12250144	1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Ke4 5. Qg6+ Kxf4 6. Qxh6+
					Kf3 7. Qf8 Qd4+ 8. Kg6+ Ke3 9.
					h6 Qg4+ 10. Kh7 Qe4+ 11. Kg7
3:42	12/13	3.34	26157408	1. g6 Rd3 2. Rxd3+ Kxd3 3. g7 d1=Q
					4. g8=Q Ke4 5. Qg6+ Kxf4 6. Qxh6+
					Kf3 7. Qf8 Qd4+ 8. Kg6+ Ke3 9.
					Qe7+ Kd3 10. h6 Qg4+ 11. Kh7 Qd4
					12. Qg7

After forcing 63.Rxd2 Kxd2:

Time	Depth	Score	Positions	Moves
0:00	5/6	0.70	28367		2. g6 Re8 3. f5 Rf8+ 4. Kg7 Rxf5
					5. Kxh6 Rf8
0:00	7/8	0.06	78635		2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. Kh7 Re7+ 6. g7 Re8 7. g8=Q Rxg8
					8. Kxg8
0:01	8/9	0.21	235555		2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. Kh7 Re8 6. g7 Kf5 7. h6
0:02	8/9	0.33	445403		2. gxh6 Re8 3. f5 Ke3 4. Kg7 Re7+
					5. Kg6 Re8 6. h7 Kd4 7. f6
0:04	9/10	0.22	750205		2. gxh6 Rh3 3. f5 Ke3 4. h7 Rxh5
					5. Kg6 Rh3 6. f6 Ke4 7. f7 Rg3+
					8. Kf6
0:05	9/10	0.48	917806		2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Ke5 7. h6
0:10	10/11	2.26	1760112		2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Rg8 7. h6 Ke5
					8. h7
0:17	11/12	2.33	3060174		2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Re6+ 7. Kf7 Rh6
					8. g8=Q Rxh5 9. Qg6
0:37	12/13	2.26	6254743		2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Re6+ 7. Kf7 Rh6
					8. g8=Q Rxh5 9. Qg6 Re5
1:20	13/14	2.29	13069233	2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Re6+ 7. Kf7 Rh6
					8. g8=Q Rxh5 9. Qg6 Rf5+ 10. Ke6
					Re5+ 11. Kf6
2:04	14/15	2.30	21175216	2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Rd8 7. h6 Ra8
					8. Kf7 Ra6 9. g8=Q Rxh6 10. Qg2
4:01	15/16	2.35	41434399	2. g6 Kd3 3. Kg7 Ke4 4. Kxh6 Kxf4
					5. g7 Re8 6. Kg6 Rd8 7. h6 Ra8
					8. h7 Ra6+ 9. Kf7 Ra7+ 10. Kf6
					Ra6+ 11. Ke7 Ra7+ 12. Ke6 Rxg7
					13. h8=Q Rg6+ 14. Kf7 Kf5 15. Qc8+
					Kg5

jm



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