Author: John Merlino
Date: 15:16:02 08/09/02
Go up one level in this thread
On August 09, 2002 at 17:40:02, Slater Wold wrote:
>On August 09, 2002 at 15:40:16, John Merlino wrote:
>
>>On August 09, 2002 at 15:31:31, John Merlino wrote:
>>
>>>On August 09, 2002 at 15:22:49, Slater Wold wrote:
>>>
>>>>On August 09, 2002 at 14:47:12, John Merlino wrote:
>>>>
>>>>>On August 09, 2002 at 14:36:41, Slater Wold wrote:
>>>>>
>>>>>>[D]1q4k1/1rb1rpp1/2p2n2/p2p4/3P2P1/2N1PQ1P/1P6/R1B2RK1 b - - 0 37
>>>>>>
>>>>>>Anyone get Rxb2?
>>>>>>
>>>>>>I am @ work so I cannot really study this, but it looks pretty nice from what I
>>>>>>can see.
>>>>>
>>>>>Chessmaster 9000, on a PIII-600, says no sale. It did take a good long look at
>>>>>it, though:
>>>>>
>>>>>Time Depth Score Positions Moves
>>>>>0:00 1/3 -0.86 1340 37...Rb3 38.Ra3 Rxa3 39.bxa3
>>>>>0:00 1/4 -0.80 3799 37...Rb3 38.g5 Ne4 39.Nxe4 dxe4
>>>>>0:00 1/5 -0.67 17492 37...Rb3 38.Qf2 Rb4 39.Qc2 Re6
>>>>>0:01 1/5 -0.68 42114 37...Bh2+ 38.Kh1 Qc7 39.g5 Ne4
>>>>> 40.Nxe4 Rxe4
>>>>>0:01 1/6 -0.68 64374 37...Bh2+ 38.Kh1 Qc7 39.g5 Ne4
>>>>> 40.Nxe4 Rxe4
>>>>>0:01 1/6 -0.80 86115 37...Rb3 38.Qf2 Nh7 39.Qf5 g6 40.Qc2
>>>>> Ng5
>>>>>0:03 1/7 -0.74 206219 37...Rb3 38.g5 Ne4 39.Nxe4 dxe4
>>>>> 40.Qf5 Rb5
>>>>>0:10 1/8 -0.78 647210 37...Rb3 38.Qf2 Nh7 39.Ra3 Rxa3
>>>>> 40.bxa3 Ng5 41.Qh4 f6 42.Kg2
>>>>>0:29 1/9 -0.69 1906490 37...Rb3 38.Qf2 Rb4 39.Qc2 Nh7
>>>>> 40.h4 Bg3 41.Rxa5 Bxh4 42.Rf4
>>>>>0:43 1/9 -0.75 2872154 37...Rb4 38.Qf2 Qe8 39.Kh1 Ne4
>>>>> 40.Nxe4 Rxe4 41.Ra3 Re7 42.Qc2
>>>>>1:34 1/10 -0.78 6403879 37...Rb4 38.Qf2 Qe8 39.Kh1 Ne4
>>>>> 40.Nxe4 Rxe4 41.Ra3 Re7 42.Qc2 Rc4
>>>>>4:31 2/11 -0.73 19090601 37...Rb4 38.Rf2 Ne4 39.Nxe4 dxe4
>>>>> 40.Qg2 Qb5 41.Rc2 Re6 42.Rc5 Qd3
>>>>> 43.Ra3
>>>>>6:17 2/11 -0.80 26150126 37...Qd8 38.g5 Qd6 39.Rf2 Ne4 40.Nxe4
>>>>> dxe4 41.Qg4 Rb5 42.Ra3 Re8 43.Rc3
>>>>>
>>>>>jm
>>>>
>>>>Well, Rxb2 led to a win against a pretty decent opponent in a standard game (not
>>>>blitz). I won't say it's the *only* move, but at least I know it does win,
>>>>pretty convincingly too.
>>>
>>>You're almost certainly correct. I'm pretty hampered by a pretty slow processor,
>>>and CM might have found the move with a better CPU. Maybe someday I'll have a
>>>1GHz! ;-)
>>>
>>>jm
>>
>>Then again, further analysis, after forcing Rxb2 Bxb2 Qxb2, shows that CM9000
>>still doesn't like it better than Qd8:
>>
>>6:55 4/12 -0.52 35620726 39.Rfc1 Qd2 40.Qe2 Qxe3+ 41.Qxe3
>> Rxe3 42.Nd1 Re6 43.Nf2 Bb6 44.Ra4
>> Ne4 45.Nxe4 Rxe4
>
>Interesting. Here's the game:
>
>1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Be7 7. cxd5 exd5 8.
>g3 c6 9. Bg2 a5 10. O-O Re8 11. h3 Nbd7 12. Nf4 Nf8 13. Qf3 Ne6 14. Nxe6
>Bxe6 15. Re1 b5 16. a4 bxa4 17. Rxa4 Rb8 18. Qe2 h5 19. Ra1 Bb4 20. Bd2 Qd7
>21. Kh2 h4 22. Rec1 hxg3+ 23. fxg3 Bf5 24. g4 Qd6+ 25. Kg1 Bg6 26. Qf2 Rb7
>27. Bf3 Bd3 28. Rd1 Qb8 29. Qe1 Bd6 30. Bc1 Bc4 31. Qf2 Bb3 32. Rf1 Bg3 33.
>Qg2 Bc4 34. Be2 Bxe2 35. Nxe2 Bc7 36. Qf3 Re7 37. Nc3 Rxb2!? 38. Bxb2 Qxb2 39.
>Rfc1 Qd2 40. Qe2 Qxe3+ 41. Qxe3 Rxe3 42. Nd1 Re6 43. Kg2 Bb6 44. Ra4 Kh7 45.
>g5 Nd7 46. Rc2 Kg6 47. h4 Kh5 48. Rf2 f6 49. gxf6 Nxf6 50. Rb2 Nd7 51. Rf2
>Re4 52. Rf7 Rg4+ 53. Kf1 Nf6 54. Ke2 Bxd4 55. Rxa5 Kxh4 56. Re7 c5 57. Ra8
>c4 58. Rh8+ Kg3 59. Ne3 Bxe3 60. Rxe3+ Kg2 61. Rc3 g5 62. Rc8 Re4+ 63. Re3
>Rf4 64. Re6 Ne4 65. Rcc6 g4 66. Re5 g3 67. Re7 Rf3 68. Rb6 Nc3+ 69. Ke1 d4
>70. Re8 Rf1+ 71. Kd2 Rf2+ 72. Kc1 d3 73. Rb2 Ne2+ 74. Kb1 c3 75. Rd8 cxb2
>76. Kxb2 Nc3+ 77. Kxc3 d2 78. Kc4 d1=Q 79. Rxd1 Rf4+ 80. Kd5 Kh2 81. Ke6 g2
>82. Ke5 Rf1 83. Rd2 Kg3 84. Rd8 Re1+ 85. Kf5 Kf3 86. Rd3+ Kf2 87. Rd2+ Kf1
>88. Rxg2 Kxg2 89. Kf4 Re2 90. Kg5 Rf2 91. Kg4 Rf3 92. Kg5 Kg3 93. Kh6 Kf4
>94. Kg6 Kg4 95. Kh7 Kf5 96. Kg7 Kg5 97. Kh8 Rf7 98. Kg8 Kg6 99. Kh8 Rf8#
>{White checkmated}
>0-1
>
>CM got the line pretty well. Perhaps an eval *after* Rxb2!? 38. Bxb2 Qxb2 39.
>Rfc1 Qd2 40. Qe2 Qxe3+ 41. Qxe3 Rxe3 42. Nd1 Re6?
Still nothing thrilling to report:
Time Depth Score Positions Moves
0:00 1/3 -0.39 810 43.Nf2 Bb6 44.g5 Ne4 45.Nxe4 dxe4
0:00 1/4 -0.51 4164 43.Nf2 Bb6 44.g5 Bxd4 45.gxf6 Bxa1
46.Rxa1 Rxf6 47.Rxa5
0:00 1/4 -0.50 5668 43.Rcb1 Re1+ 44.Kf2 Rh1 45.Rb7 Bd6
0:00 1/5 -0.63 14933 43.Rcb1 Re4 44.g5 Ne8 45.Rc1 Rxd4
46.Rxc6
0:00 1/5 -0.56 17187 43.Nf2 Bb6 44.Ra4 Ne4 45.Nxe4 Rxe4
0:00 1/6 -0.56 25388 43.Nf2 Bb6 44.Ra4 Ne4 45.Nxe4 Rxe4
0:01 1/7 -0.63 75290 43.Nf2 Bb6 44.Ra4 Ne4 45.Nxe4 Rxe4
46.Rxc6 Rxd4
0:01 1/7 -0.60 129348 43.Rab1 Bf4 44.Rc5 Re4 45.Rxc6
Rxd4 46.Rc8+ Kh7 47.Nc3
0:02 1/8 -0.66 211776 43.Rab1 Bf4 44.Rc2 Re4 45.Rxc6
Rxd4 46.Nc3 Rd2 47.Kf1
0:03 1/8 -0.59 249213 43.Nf2 Bb6 44.Ra4 Nd7 45.Kf1 c5
46.dxc5 Nxc5
0:05 2/9 -0.63 390039 43.Nf2 Bb6 44.Ra4 Nd7 45.Kf1 c5
46.dxc5 Nxc5 47.Ra3
0:11 3/10 -0.61 875230 43.Nf2 Bb6 44.Ra4 Nd7 45.Kf1 c5
46.dxc5 Nxc5 47.Ra3 a4
0:33 4/11 -0.63 2631271 43.Nf2 Bb6 44.Ra4 Nd7 45.Kf1 c5
46.dxc5 Nxc5 47.Ra3 a4 48.Rcc3
1:38 5/12 -0.49 8228895 43.Nf2 Bf4 44.Rd1 Ne4 45.Ra3 Bc7
46.Nxe4 Rxe4 47.Rb3 Bf4 48.Kf2 a4
3:31 6/13 -0.51 18963490 43.Nf2 Bf4 44.Rd1 Ne4 45.Ra3 Bc7
46.Nxe4 Rxe4 47.Rb3 Bf4 48.Kf2
a4 49.Ra3
7:30 6/13 -0.46 39988094 43.Kg2 Ne4 44.Rc2 Bb6 45.Ra4 Rd6
46.Nc3 Kf8 47.Nxe4 dxe4 48.Re2
Rxd4 49.Rxe4 Rd2+ 50.Kf3
I think this may be one of those instances in which the game just slowly gets
better for one side. Doing some fairly quick analysis through the game, CM
agrees with just about every move, but the eval slowly starts rising for Black,
until 50.Rb2, when it finally goes above one point in Black's favor.
And 78...d1=Q means SOMEBODY was using EGTBs.... ;-)
jm
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