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Subject: Re: How do white win? (Endgame R against B+B)

Author: Peter McKenzie

Date: 18:21:52 05/17/02

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On May 17, 2002 at 17:35:19, Eduard Nemeth wrote:

>On May 17, 2002 at 17:28:39, Peter McKenzie wrote:
>
>>On May 17, 2002 at 17:02:50, Eduard Nemeth wrote:
>>
>>>This interesting position I find in this game. Ok. white hase won, see this
>>>notation but: is this real a win position for white?
>>>
>>>
>>>[Event "Oceana zt Warwick Fiji FIJ"]
>>>[Site "?"]
>>>[Date "2002.??.??"]
>>>[Round "?"]
>>>[White "Fancy,S"]
>>>[Black "Sharma,Roneel"]
>>>[WhiteElo "2205"]
>>>[ECO "C02"]
>>>[Result "1-0"]
>>>
>>>1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Bd7
>>>7. O-O cxd4 8. cxd4 Nxd4 9. Nxd4 Qxd4 10. Qe2 Ne7 11. Nc3
>>>a6 12. Rd1 Qb6 13. Be3 Qc7 14. Bf4 Ng6 15. Bg3 Bc5 16. Nxd5
>>>Qd8 17. Nc3 O-O 18. Ne4 Be7 19. Rac1 Qb6 20. Nd6 Bc6 21. h4
>>>f5 22. exf6 Rxf6 23. Bc4 Bd5 24. Rxd5 exd5 25. Bxd5+ Kf8
>>>26. Nc8 Qb5 27. Qxb5 axb5 28. h5 Nf4 29. Bxb7 Ne2+ 30. Kh2
>>>Nxc1 31. Bxa8 Ra6 32. Bd5 Nxa2 33. Nxe7 Kxe7 34. Be5 Kf8
>>>35. g4 Nb4 36. Bb7 Re6 37. Bd4 Nd3 38. Kg3 Rd6 39. Bc3 Nc5
>>>40. Bf3 Nd3 41. Be4 h6 42. Kf3 b4 43. Bd2 Rf6+ 44. Ke3 Nxf2
>>>45. Bxb4+ Kg8 46. Bd5+ Kh8 47. Bf3 Nh3 48. Bc3 Rf8 49. Be4
>>>Ng5 50. Bf5 Rd8 51. b4 Nf7 52. Bd4 Nd6 53. Bd3 Re8+ 54. Kd2
>>>Rd8 55. Kc2 Rc8+ 56. Kb3 Kg8 57. b5 Rb8 58. Kb4 Kh8 59. Kc5
>>>Nxb5 60. Bxb5 Rf8 61. Bd7 Rf4 62. Kd5 Rf1 63. Ke6 Rd1
>>>64. Be5 Rb1 65. Be8 Rb7 66. Bd7 Ra7 67. Bd4 Ra6+ 68. Kf7
>>>Ra5 69. Bxg7+ Kh7 70. Bf8 Rg5 71. Bf5+ Kh8 72. Bxh6 Rg8
>>>73. Bc1 Rf8+ 74. Ke7 Rf7+ 75. Ke6 Rf8 76. h6 Re8+ 77. Kd5
>>>Rd8+ 78. Ke4 Re8+ 79. Kf4 Re7 80. Bb2+ Kg8 81. h7+ 1-0
>>>
>>>How do white win?
>>
>>I suspect black can draw.
>>Your diagram was after move 66....Ra7, and black blundered with Ra6+ where Rc7
>>is probably sufficient to hold the draw.
>>
>>A funny variation is Bd4 Rc7 g5 Rc4 Bb2 (Be5 Re4 gh Rxe5!) Rf4 gh Rf6+ =
>>
>>Peter
>>
>>>
>>>[D]7k/r2B2p1/4K2p/4B2P/6P1/8/8/8 w - -
>>>
>>>
>>>Eduard
>
>Thanks Peter!
>
>What says your program ?

Oh, my program is a bit clueless and evaluates that position as about +2.5 for
white :-)  But the score changes dramatically after Ra6+??.

Peter

>
>
>best wishes,
>Eduard



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